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Journal articles on the topic 'Copolymer of styrene'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Dolgin, Ignat S., Pyotr P. Purygin та Yury P. Zarubin. "Synthesis of new copolymers based on 2,3,4,5,6-pentafluorostyrene, styrene, α-methylstyrene and 4-fluoro-α-methylstyrene". Butlerov Communications 60, № 12 (2019): 91–95. http://dx.doi.org/10.37952/roi-jbc-01/19-60-12-91.

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At the first stages of the research work, a copolymer of styrene and α methyl styrene was synthesized by the method of radical emulsion polymerization in an inert atmosphere of argon. The initiator was ammonium persulfate. The molar ratio of the initial monomers of styrene and α-methylstyrene was 70 : 30, respectively. It was found that copolymers synthesized under special controlled conditions have good values of permittivity and dielectric loss tangent. It should be noted that the choice of emulsifier directly affects the values of these indicators. It was previously shown that the most opti

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2

Dolgin, Ignat S., Pyotr P. Purygin та Yury P. Zarubin. "Investigation of the dielectric properties of copolymers based on 2,3,4,5,6-pentafluorostyrene, styrene, 4-fluoro-α-methylstyrene and α-methylstyrene". Butlerov Communications 60, № 12 (2019): 87–90. http://dx.doi.org/10.37952/roi-jbc-01/19-60-12-87.

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Three new copolymers based on fluorine-containing derivatives of styrene and α-methylstyrene were obtained. According to the results of the previous stages of the study, copolymers based on styrene derivatives have improved dielectric properties compared to polystyrene and a copolymer of styrene and α-methyl styrene. The dielectric constant ε and dielectric loss tangent tanδ were measured for the initial and synthesized samples of styrene – α-methyl styrene copolymer at Samara Electromechanical Plant OJ-SC (Samara city, Russia). All measurements of dielectric characteristics were carried out a

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3

Zhang, Da Wei, Jin Song Leng, and Yan Ju Liu. "Influence of Radialization Dosage on Shape Memory Effect of Polystyrene Copolymer." Advanced Materials Research 47-50 (June 2008): 690–93. http://dx.doi.org/10.4028/www.scientific.net/amr.47-50.690.

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This paper is concerned about the synthesis of shape memory styrene copolymer and the investigation of the influence of radialization dosage on its shape memory effect. As one of novel actuators in smart materials, shape memory polymers (SMPs) have been investigated intensively. Styrene copolymer with proper cross-linking degree can exhibit shape memory effect (SME). In this paper, the influence of radialization on shape memory effect of styrene copolymer was investigated through altering the dosage of radialization. The radialization dosage of styrene copolymer was determined by changed radic

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4

Tanaka, Yasuyuki, Hisaya Sato, and Junichi Adachi. "Structural Characterization of Diene Block Copolymers by GPC and Ozonolysis—GPC Measurements." Rubber Chemistry and Technology 60, no. 1 (1987): 25–34. http://dx.doi.org/10.5254/1.3536119.

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Abstract The sequence distribution and block structure of styrene units in commercial styrene—butadiene and styrene-isoprene copolymers were analyzed by GPC measurements on the original copolymers and on ozonolysis products. Tapered-block structures are clearly differentiated by ozonolysis—GPC measurements. The content of large block styrene sequences in S-B-S type block copolymers was found to be 77 to 99% or more. S-B and S sequences in addition to the S-B-S sequence were observed for most of the triblock copolymers. A star-shaped S-B-S copolymer was distinguished from a linear copolymer by

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5

Kowalczynska, H. M., and J. Kaminski. "Adhesion of L1210 cells to modified styrene copolymer surfaces in the presence of serum." Journal of Cell Science 99, no. 3 (1991): 587–93. http://dx.doi.org/10.1242/jcs.99.3.587.

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The static adhesion of living L1210 cells (in serum-containing medium) to the surface of (styrene/methylmethacrylate) copolymers differing in styrene content (from 5% to 50% of styrene units) was investigated. The examination of wettability of the copolymer surfaces showed that the contact angle of water on the hydrophobic surfaces is an increasing linear function of styrene content in the copolymer. Cell adhesion to the unwettable surfaces is low (within 2–4%). A novel method of modification of the styrene copolymer surfaces was used to render these surfaces suitable for cell attachment. The

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6

Mieczkowski, Paweł, Bartosz Budziński, Mieczysław Słowik, Jan Kempa, and Wojciech Sorociak. "Experimental Study of Tensile Properties of Styrene–Butadiene–Styrene Modified Asphalt Binders." Materials 14, no. 7 (2021): 1734. http://dx.doi.org/10.3390/ma14071734.

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The requirements imposed on road pavements are ever increasing nowadays, necessitating the improvement of the properties of paving materials. The most commonly used paving materials include bituminous mixtures that are composed of aggregate grains bound by a bituminous binder. The properties of bitumens can be improved by modification with polymers. Among the copolymers used for modifying bitumens, styrene–butadiene–styrene, a thermoplastic elastomer, is the most commonly used. This article presents the results of tests conducted on bitumens modified with two types of styrene–butadiene–styrene

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7

Broglia, Martin F., Diego F. Acevedo, Denise Langheinrich, Heidi R. Perez-Hernandez, Cesar A. Barbero, and Andrés F. Lasagni. "Rapid Fabrication of Periodic Patterns on Poly(styrene-co-acrylonitrile) Surfaces Using Direct Laser Interference Patterning." International Journal of Polymer Science 2015 (2015): 1–7. http://dx.doi.org/10.1155/2015/721035.

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Periodic microstructures in styrene-acrylonitrile (SAN) copolymers are fabricated by two-beam direct laser interference patterning using a nanosecond pulsed laser operating at a wavelength of 266 nm. The SAN copolymers are synthesized using different molar ratios (styrene to acrylonitrile) by a free radical polymerization process. The chemical composition of the copolymers and their properties are determined using Fourier transformed infrared spectroscopy (FTIR) and differential scanning calorimetry (DSC). Depending on the composition of the irradiated copolymer films, with weight ratios rangi

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8

Pellecchia, Claudio, and Leone Oliva. "Ethylene—Styrene Copolymerization." Rubber Chemistry and Technology 72, no. 3 (1999): 553–58. http://dx.doi.org/10.5254/1.3538817.

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Abstract Ethylene—styrene copolymers are new materials developed within the last decade using the new homogeneous olefin polymerization catalysts (generally referred to as “metallocene catalysts”). By proper selection of the catalytic system and the reaction conditions, a variety of copolymers with different compositions, structures, and properties can be obtained. Thus, copolymers containing a very low amount of styrene (or p-methylstyrene) on a substantially polyethylenic backbone are crystalline thermoplastics, which could be used to produce functionalized PEs. Increasing the styrene conten

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9

Abbasova, L. Sh. "Preparation of copolymer of allyl ester of salicylic acid with styrene and study of its antifungal properties." Perspektivnye Materialy 4 (2022): 34–39. http://dx.doi.org/10.30791/1028-978x-2022-4-34-39.

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The reactions of radical copolymerization of the allyl ester of salicylic acid with styrene were carried out and their patterns and products were studied. The Feinemann-Ross method was used to determine the constants of the relative activity of the copolymers (r1 = 0.02 and r2 = 9.6) and the parameters of the microstructure of the obtained copolymers. It was found that with an increase in the styrene content from 10 to 90 mol. % in the initial mixture of monomers, the average length of microblocks consisting of styrene units increases from 2.07 to 87.4, the length of microblocks of allylsalicy

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10

Roggi, Andrea, Elisa Guazzelli, Claudio Resta, Gabriele Agonigi, Antonio Filpi, and Elisa Martinelli. "Vinylbenzyl Chloride/Styrene-Grafted SBS Copolymers via TEMPO-Mediated Polymerization for the Fabrication of Anion Exchange Membranes for Water Electrolysis." Polymers 15, no. 8 (2023): 1826. http://dx.doi.org/10.3390/polym15081826.

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In this work, a commercial SBS was functionalized with the 2,2,6,6-tetramethylpiperidin-N-oxyl stable radical (TEMPO) via free-radical activation initiated with benzoyl peroxide (BPO). The obtained macroinitiator was used to graft both vinylbenzyl chloride (VBC) and styrene/VBC random copolymer chains from SBS to create g-VBC-x and g-VBC-x-co-Sty-z graft copolymers, respectively. The controlled nature of the polymerization as well as the use of a solvent allowed us to reduce the extent of the formation of the unwanted, non-grafted (co)polymer, thereby facilitating the graft copolymer’s purific

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11

Azimi, Hamid Reza, and Mostafa Rezaei. "The determination of n-pentane solubility and diffusivity in styrene–methyl methacrylate copolymers via designed apparatus." Journal of Cellular Plastics 53, no. 3 (2016): 319–31. http://dx.doi.org/10.1177/0021955x16652105.

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In this work, styrene–methyl methacrylate copolymer particles were synthesized by suspension polymerization process with different copolymer compositions. A system was designed to measure the solubility and diffusivity of n-pentane in the synthesized copolymers. The designed system consisted of the self-sealing cell equipped to the pressure and temperature controllers. The synthesized copolymer particles were impregnated by n-pentane and their expansion were recorded visually. Furthermore, the solubility and diffusivity of n-pentane in copolymer particles were measured by the same apparatus. T

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12

Tsai, Bin-Hong, Tse-An Lin, Chi-Hui Cheng, and Jui-Che Lin. "Studies of the Sulfonated Hydrogenated Styrene–Isoprene–Styrene Block Copolymer and Its Surface Properties, Cytotoxicity, and Platelet-Contacting Characteristics." Polymers 13, no. 2 (2021): 235. http://dx.doi.org/10.3390/polym13020235.

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Styrenic thermoplastic elastomers (TPEs) consist of styrenic blocks. They are connected with other soft segments by a covalent linkage and are widely used in human life. However, in biomedical applications, TPEs need to be chemically hydrogenated in advance to enhance their properties such as strong UV/ozone resistance and thermal-oxidative stability. In this study, films composed of sulfonated hydrogenated TPEs were evaluated. Hydrogenated tert-butyl styrene–styrene–isoprene block copolymers were synthesized and selectively sulfonated to different degrees by reaction with acetyl sulfate. By c

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13

Dolgin, I. S., Petr P. Purygin, Y. P. Zarubin та A. V. Samorodov. "Synthesis, Study of Dielectric Properties, Thermogravimetric Analysis and Hemolytic Effect of Copolymers Based on Various Derivatives of Styrene and α-Methylstyrene". Materials Science Forum 1022 (лютий 2021): 203–11. http://dx.doi.org/10.4028/www.scientific.net/msf.1022.203.

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The paper describes the synthesis of three new copolymers based on styrene and α-methylstyrene derivatives by radical emulsion copolymerization in an aqueous medium in the presence of an ammonium persulfate initiator and potassium stearate emulsifier. In early study, it was found that copolymers based on methoxy derivatives of styrene have the advanced dielectric properties, as compared to polystyrene and a copolymer of styrene and α-methylstyrene. In addition, the latest scientific literature provides data on the biological activity of styrene copolymers. Thus, the synthesis and study of the

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14

Zhang, Da Wei, Yan Hua Zhang, Li Hua Zhang, and Shui Hu. "Study on the Shape Memory Effect of Styrene Copolymer." Advanced Materials Research 148-149 (October 2010): 1464–68. http://dx.doi.org/10.4028/www.scientific.net/amr.148-149.1464.

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This paper is concerned about the synthesis of shape memory styrene copolymer and the investigation of the influence of cross-linking degree on its shape memory effect. The influence of cross-linking degree on shape memory effect of styrene copolymer was investigated through altering the dosage of cross-linking agent. The Tg increased from 65 to 80.7 with the gel content increase from 35% to 80% which is achieved by increasing the dosage of cross-linking agent from 1% to 4%. Moreover, the SMP experienced good SME and the largest reversible strain of the SMP reached as high as 150%. When the co

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15

Iftime, Gabriel, Lana Fisher, Almeria Natansohn, and Paul Rochon. "Photoinduced birefringence in copolymers containing Disperse Red 1 and styrene." Canadian Journal of Chemistry 78, no. 4 (2000): 409–14. http://dx.doi.org/10.1139/v00-034.

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A series of copolymers of 4'-[[[2-(methacryloyloxy)ethyl]ethyl]amino]-4-nitroazobenzene (DR1M) and an optically "inert" styrene comonomer were tested for photoinduced birefringence. The level of saturated birefringence increased linearly with the content of DR1M in the copolymer. The birefringence per mole of azo chromophore was constant along the copolymer series.Key words: azobenzene, photoinduced birefringence, copolymers, trans-cis isomerization.

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16

Lokaj, Jan, Libuše Brožová, Petr Holler, and Zbyněk Pientka. "Synthesis and Gas Permeability of Block Copolymers Composed of Poly(styrene-co-acrylonitrile) and Polystyrene Blocks." Collection of Czechoslovak Chemical Communications 67, no. 2 (2002): 267–78. http://dx.doi.org/10.1135/cccc20020267.

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Radical copolymerization of a mixture of styrene (S) and acrylonitrile (AN) at azeotropic composition (63 mole % of S and 37 mole % of AN) at 125 °C in the presence of dibenzoyl peroxide and 2,2,6,6-tetramethylpiperidin-1-yloxyl (TEMPO) gave TEMPO-terminated S-AN copolymers with narrow molecular weight distributions. Both the linear semilogarithmic time-conversion and molecular weight-conversion dependences indicated a quasiliving copolymerization process. Polymerization of styrene initiated with the synthesized macroinitiators containing reversibly bound terminal TEMPO groups yielded film-for

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17

Garcia-Rubio, L. H., and N. Ro. "Detailed copolymer characterization using ultraviolet spectroscopy." Canadian Journal of Chemistry 63, no. 1 (1985): 253–63. http://dx.doi.org/10.1139/v85-042.

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A method is demonstrated for the interpretation of the ultraviolet spectra of styrene-containing copolymers. This method is based on the use of model molecules to approximate the absorption behaviour of the known chromophores and on the statistical estimation of the average spectra of the unknown chromophores. The analysis yields directly the copolymer composition and an estimate of the background spectra which arise from the different arrangements of the styril units along the polymer chains. It is shown that reliable composition estimates are obtained for styrene – methyl methacrylate and st

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18

Lin, Hu Bin, Chong Ming Du, Jian Yi Zhu та Wen Yao Liang. "Non-Isothermal Crystallization Behavior and Kinetics of Compatibilized β Nucleated Polypropylene/Polystyrene Blends". Advanced Materials Research 893 (лютий 2014): 291–94. http://dx.doi.org/10.4028/www.scientific.net/amr.893.291.

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The β nucleated polypropylene (PP), uncompatibilized β nucleated PP/polystyrene (PS) and compatibilized β nucleated PP/PS blends were prepared on a twinscrew extruder.and added into compatibilizers styrene-ethylene-propylene block copolymer (SEP) or two styrene-ethylene-butylen- e-styrene block copolymers (SEBS) with different content of styrene.The crystallization characteristic, melting behavior and crystallization kinetics of these composites were studied.

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19

Negim, El-Sayed, A. M. Konysbay, G. Irmukhametova, and S. N. Kalugin. "Synthesis and characterization of polypropylene glycol-graft-styrene." Kompleksnoe Ispolʹzovanie Mineralʹnogo syrʹâ/Complex Use of Mineral Resources/Mineraldik Shikisattardy Keshendi Paidalanu 318, no. 3 (2021): 5–11. http://dx.doi.org/10.31643/2021/6445.23.

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Grafting polymerization based on polypropylene glycol (PPG) and styrene (St) was synthesized with different composition of styrene using the free radical technique in the presence of potassium persulphate as an initiator. The grafted copolymers (PPG-g-St) used different styrene composition (65/15, 65/25, 65/35), respectively. The grafted copolymers were investigated through FTIR (Fourier-transform spectroscopy), Differential scanning calorimeter and thermogravimetric analyzer. FTIR showed new peaks at 1450 cm-1 and 1135 cm-1 due to the grafting process of St on PPG. Thermal stability of grafte

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20

Lee, Sang-In, Min-Guk Seo, June Huh, and Hyun-jong Paik. "Effective Interaction between Homo- and Heteropolymer Block of Poly(n-butyl acrylate)-b-poly(methyl methacrylate-r-styrene) Diblock Copolymers." Polymers 15, no. 13 (2023): 2915. http://dx.doi.org/10.3390/polym15132915.

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We investigated the segregation behavior of a molten diblock copolymer, poly(n-butyl acrylate)-b-poly(methyl methacrylate-r-styrene) (PBA-b-P(MMA-r-S)), wherein styrene (S) is incorporated as a comonomer in the second block to modulate the effective interaction between homopolymer and a random copolymer block. The temperature dependence of the effective interaction parameter χeff between n-butyl acrylate (BA) and the average monomer of the MMA-r-S random block was evaluated from small-angle X-ray scattering (SAXS) analysis using the random phase approximation (RPA) approach. The calculated χef

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21

Mandal, Prithwiraj, Siva Ponnupandian, Soumyadip Choudhury, and Nikhil K. Singha. "TUNING PROPERTIES AND MORPHOLOGY IN HIGH VINYL CONTENT SBS BLOCK COPOLYMER, A THERMOPLASTIC ELASTOMER VIA THIOL-ENE MODIFICATION." Rubber Chemistry and Technology 90, no. 3 (2017): 550–61. http://dx.doi.org/10.5254/rct.17.83761.

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ABSTRACT Thiol-ene modification of high vinyl content thermoplastic elastomeric styrene butadiene styrene (SBS) block copolymer (BCP) was carried out using different thiolating agents in toluene at 70 °C. 1H NMR analysis confirmed the participation of vinyl double bond in the thiol-ene modification reaction of SBS. Surface morphology of the block copolymers evaluated by atomic force microscopy analysis showed higher roughness after the thiol-ene reaction. The thiol-modified SBS block copolymer showed better adhesion strength and oil resistance properties than the pristine SBS.

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22

Colvin, Howard, and Charles Bull. "Sulfur/Olefin Copolymers as Vulcanizing Agents for Rubber." Rubber Chemistry and Technology 68, no. 5 (1995): 746–56. http://dx.doi.org/10.5254/1.3538771.

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Abstract Sulfur/olefin copolymers are known as vulcanizing agents for rubber, but synthetic procedures for these materials are poor and there is little in the literature to relate the structure of the copolymer with the vulcanizate properties of the rubber. This study discusses a new suspension process for the preparation of sulfur/dicyclopentadiene and sulfur/dicyclopentadiene/styrene copolymers. The relationship between the sulfur/olefin copolymer and vulcanizate properties is discussed in terms of the structure of the copolymer and other reaction products.

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23

J.E., Saidov, and Ikhtiyarova G.A. "DEVELOPMENT OF A DEPRESSOR ADDITIVE BASED ON BIODEGRADABLE CHITOSAN FOR DIESEL FUEL." American Journal of Applied Science and Technology 4, no. 11 (2024): 28–34. http://dx.doi.org/10.37547/ajast/volume04issue11-05.

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For the first time in scientific research, effective compositions of copolymers based on environmentally friendly aminopolysaccharide chitosan and acrylic acid and styrene were developed and scientifically based. The scientific significance of the research results was explained by the fact that a copolymer was obtained from acrylic and styrene.

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24

Wang, Fusong, Lei Zhang, Xiaoshan Zhang, Hechuan Li, and Shaopeng Wu. "Aging Mechanism and Rejuvenating Possibility of SBS Copolymers in Asphalt Binders." Polymers 12, no. 1 (2020): 92. http://dx.doi.org/10.3390/polym12010092.

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The styrene–butadiene–styrene (SBS)-modified asphalt pavement has been in growing demand in the road construction field owing to its workable mechanical property and temperature durability. This paper prepared a penetrative rejuvenator (PR) with waste cooking oil (WCO) and emulsified asphalt, then applied PR on SBS copolymers to investigate its aging and rejuvenating effects in an asphalt binder. After a thin film oven test (TFOT) and ultraviolet (UV) aging of SBS copolymers, Fourier transform infrared (FTIR) spectra were used to analyse the aged copolymers’ chemical structure. Moreover, both

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25

Husár, Branislav, Norbert Moszner, and Ivan Lukáč. "Synthesis and photooxidation of styrene copolymer bearing camphorquinone pendant groups." Beilstein Journal of Organic Chemistry 8 (March 6, 2012): 337–43. http://dx.doi.org/10.3762/bjoc.8.37.

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(±)-10-Methacryloyloxycamphorquinone (MCQ) was synthesized from (±)-10-camphorsulfonic acid either by a known seven-step synthetic route or by a novel, shorter five-step synthetic route. MCQ was copolymerized with styrene (S) and the photochemical behavior of the copolymer MCQ/S was compared with that of a formerly studied copolymer of styrene with monomers containing the benzil (BZ) moiety (another 1,2-dicarbonyl). Irradiation (λ > 380 nm) of aerated films of styrene copolymers with monomers containing the BZ moiety leads to the insertion of two oxygen atoms between the carbonyl groups of

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26

Açıkses, Aslışah, Necmittin Çömez, and Fatih Biryan. "Preparation and Characterization of Styrene Bearing Diethanolamine Side Group, Styrene Copolymer Systems, and Their Metal Complexes." International Journal of Polymer Science 2018 (2018): 1–15. http://dx.doi.org/10.1155/2018/6703783.

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The two copolymer systems of styrene bearing diethanol amine side group and styrene were prepared by free radical polymerization method at 60°C in presence of 1,4-dioxane as solvent and AIBN as initiator. Their metal complexes were prepared by reaction of the copolymer used as ligand P(DEAMSt-co-St)L′′ and Ni(II) and Co(II) metal ions, which was carried out in presence of ethanol and NaOH at 65°C for 48 h in pH = 7.5. The structures of the copolymers used as ligand and metal complexes were identified by FT-IR, 1H-NMR spectra, and elemental analysis. The properties of the copolymers used as lig

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Mamedli, S. B. "PREPARATION OF OPTICAL TRANSPARENT COMPOSITES ON THE BASIS OF BUTYL METHACRYLATE WITH -METHYL STYRENE." Azerbaijan Chemical Journal, no. 1 (March 15, 2022): 34–40. http://dx.doi.org/10.32737/0005-2531-2022-1-34-40.

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The process of radical binary copolymerization of butyl methacrylate and α-methyl styrene in a solvent has been carried out and optically transparent copolymers at various molar ratios have been synthesized. The copolymers synthesized based on butyl methacrylate and α-methyl styrene have relatively high refraction coefficient ( =1.5880) and transmission values (about 86%). The copolymerization constants values (r1 and r2) of the above-mentioned monomer pairs have been found and Q-e parameters have been calculated. The microstructure of the obtained copolymer samples of the butyl methacrylate w

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Badanov, S. V., A. V. Urumov, V. V. Bayandin, and N. S. Shaglaeva. "Reactivity of 2,3-Dichloropropene in free-radical copolymerization reactions." Proceedings of Universities. Applied Chemistry and Biotechnology 11, no. 4 (2022): 517–22. http://dx.doi.org/10.21285/2227-2925-2021-11-4-517-522.

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The copolymers of 2,3-Dichloropropene with vinyl chloride, methyl methacrylate, and styrene of different compositions were obtained via free-radical copolymerization. The copolymerization constants for the comonomers were found from the dependence of the copolymer composition on the initial mixture content. An increase in the content of 2,3-Dichloropropene in the initial mixture was found to decrease the yield and intrinsic viscosity of the copolymer for all systems. The reactivity of 2,3-Dichloropropene in copolymerization reactions was assessed according to the reciprocals of the copolymeriz

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Chowdhury, Tanaka, Nakayama, and Shiono. "Copolymerization of Norbornene and Styrene with Anilinonaphthoquinone-Ligated Nickel Complexes." Polymers 11, no. 7 (2019): 1100. http://dx.doi.org/10.3390/polym11071100.

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Poly(norbornene-co-styrene)s were synthesized by the use of anilinonaphthoquinone-ligated nickel complexes [Ni(C10H5O2NAr)(Ph)(PPh3): 1a, Ar = C6H3-2,6-iPr; 1b, Ar = C6H2-2,4,6-Me; 1c, Ar = C6H5] activated with modified methylaluminoxane (MMAO) or B(C6F5)3 in toluene. The effects of the cocatalysts were more significant than those of the nickel complexes, and MMAO gave higher activity than B(C6F5)3. The structural characterizations of the products indicated the formation of statistical norbornene copolymers. An increase of the styrene ratio in feed led to an increase in the incorporated styren

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Chen, Wei-Cheng, Yu-Hsuan Tsao, Chih-Feng Wang, et al. "Main Chain–Type Block Copolymers through Atom Transfer Radical Polymerization from Double-Decker–Shaped Polyhedral Oligomeric Silsesquioxane Hybrids." Polymers 12, no. 2 (2020): 465. http://dx.doi.org/10.3390/polym12020465.

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In this study, we synthesized two main chain–type block copolymers featuring hydrogen bond donor and acceptor segments through atom transfer radical polymerization (ATRP) using a bifunctionalized polyhedral oligomeric silsesquioxane (POSS) nanoparticle as the initiator. Hydrosilylation of vinylbenzyl chloride at the two corners of a double-decker silsesquioxane (DDSQ) provided the bifunctionalized benzyl chloride initiator VBC-DDSQ-VBC, which we applied as a platform to prepare a main chain–type polystyrene homopolymer (PS-DDSQ-PS), the diblock copolymer poly(styrene–b–4-vinylpyridine) (P4VP-b

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Lin, Hu Bin, Chong Min Du, Jian Yi Zhu та Wen Yao Liang. "Morphology and Mechanical Properties of Compatibilized β Nucleated Polypropylene/Polystyrene Blends". Advanced Materials Research 902 (лютий 2014): 63–65. http://dx.doi.org/10.4028/www.scientific.net/amr.902.63.

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The β nucleated polypropylene (PP), uncompatibilized β nucleated PP/polystyrene (PS) and compatibilized β nucleated PP/PS blends were prepared on a twinscrew extruder.and then,added into compatibilizers styrene-ethylene-propylene block copolymer (SEP) or twostyrene-ethylene-butylene-styrene block copolymers (SEBS) with different content of styrene.The morphology and mechanical properties of these composites were investigated.

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Sadygova, A. I. "COPOLYMERS ON THE BASIS OF (p-CHLOROPHENOXYCARBONYL)-CYCLOPROPYL STYRENE WITH STYRENE AND METHYL METHACRYLATE." Azerbaijan Chemical Journal, no. 3 (September 22, 2022): 45–50. http://dx.doi.org/10.32737/0005-2531-2022-3-45-50.

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The radical copolymerization of (p-chlorophenoxycarbonyl)cyclopropyl styrene with styrene and methyl methacrylate has been carried out. New cyclopropane-containing copolymers have been obtained. It has been established that the synthesized copolymers due to peculiarities of their structure and polyfucntionality, namely with content of carbonyl and cyclopropane groups sensitive to UV irradiation in the macromolecule have photosensitivity. The constant values of relative activity of monomers have been determined and Q-e parameters on Alfrey and Price have been calculated. The copolymerization co

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Gong, Yafeng, Yunze Pang, Fayang Li, Weidong Jin, Haipeng Bi, and Yulin Ma. "Analysis of the Influence of SBS Content and Structure on the Performance of SBS/CR Composite Modified Asphalt." Advances in Materials Science and Engineering 2021 (April 22, 2021): 1–12. http://dx.doi.org/10.1155/2021/5585891.

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The performance of asphalt can be improved by adding styrene-butadiene-styrene (SBS) copolymer and crumb rubber (CR). This paper investigated the influence of the structure and content of styrene-butadiene-styrene (SBS) copolymer on the properties of SBS/CR modified asphalt (SBS/CRMA). These SBS/CRMA were prepared by mixing 90# matrix asphalt, 60 mesh CR powder, and SBS copolymers with two molecular structures, which were tested for penetration, softening point, ductility, and rheology. The complex modulus, phase angle, rutting factor, storage modulus, and dissipation modulus of SBS/CRMA were

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Li, Ting Ting, Zhi Ming Zhang, He Ti Li, and Jie Cao. "Study on Synthesis and Characterization of Styrene-Maleic Anhydride Random Copolymer by Xylene." Advanced Materials Research 750-752 (August 2013): 1075–78. http://dx.doi.org/10.4028/www.scientific.net/amr.750-752.1075.

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Radical copolymerization of styrene (St) and maleic anhydride (MA) were typically alternating copolymerization, which generated copolymer styrene-maleic anhydride (SMA). The copolymer was synthesized by solution polymerization method,with benzoyl peroxide (BPO) as initiator and xylene as solvent, and using the yield of copolymer as evaluation criteria, the reaction conditions were researched. The maleic anhydride of molar fraction was 45% in the copolymer measured by chemical titration, combined with the theoretical that the synthesis of styrene-maleic anhydride copolymer was confirmed to be t

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Feng, Hui Xia, Jian Qiang Zhang, and Sheng Li Liu. "Study on Synthesis of Methyl Methacrylate/Styrene Copolymer by Suspension Polymerization." Advanced Materials Research 150-151 (October 2010): 1476–79. http://dx.doi.org/10.4028/www.scientific.net/amr.150-151.1476.

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It was reported that suspension polymerization experiment of methyl methacrylate/ styrene copolymer in inorganic/organic ternary composite system. Some factors on modification of methacrylate/styrene copolymer were studied and optimized synthesis technics was found. The configuration and thermal performance of round bead copolymer products was analyzed by FT-IR and thermogravimetry. Methyl methacrylate/Styrene copolymer dispersed in O-MMT suspension polymerization system showed there was evident improvement about its thermostability.

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STASIAK, JOANNA, GEOFF D. MOGGRIDGE, ADRIANO ZAFFORA, ANNA PANDOLFI, and MARIA L. COSTANTINO. "ENGINEERING ORIENTATION IN BLOCK COPOLYMERS FOR APPLICATION TO PROSTHETIC HEART VALVES." Functional Materials Letters 03, no. 04 (2010): 249–52. http://dx.doi.org/10.1142/s1793604710001342.

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This study demonstrates how the mechanical performance of polymeric material can be enhanced by morphology and phase orientation of block copolymers to achieve desired anisotropic mechanical properties. The material used was a new Kraton block copolymer consisting of styrene-isoprene-butadiene-styrene blocks having cylindrical morphology. We report a method of achieving long range uniaxial as well as biaxial orientation of block copolymer. Each microstructural organization results in a specific mechanical performance, which depends on the direction of the applied deformation. The method of tai

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Picchioni, Francesco, Elisa Passaglia, Giacomo Ruggeri, Maria Teresa Piccini, and Mauro Aglietto. "Blends of styrene-butadiene-styrene triblock copolymer with random styrene-maleic anhydride copolymers." Macromolecular Chemistry and Physics 203, no. 10-11 (2002): 1396–402. http://dx.doi.org/10.1002/1521-3935(200207)203:10/11<1396::aid-macp1396>3.0.co;2-p.

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Gusarov, M. V., A. V. Krylov, E. A. Deshevaya, and V. A. Tverskoy. "Synthesis and properties of vinyl benzyl alcohol copolymers with styrene." Fine Chemical Technologies 16, no. 5 (2021): 399–413. http://dx.doi.org/10.32362/2410-6593-2021-16-5-399-413.

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Objectives. Synthesis and study of the properties of copolymers of vinyl benzyl alcohol (VBA) with styrene with antimicrobial properties.Methods. The study employed infrared (IR) and nuclear magnetic resonance (NMR) spectroscopy, thin-layer chromatography, viscometry, and elemental analysis. The sessile drop method and the pencil method were respectively utilized to determine the contact angles and hardness of the films. The process of testing the film coatings’ resistance to the effects of molds consisted of contaminating the film coatings applied to the glass with mold spores of the All-Russ

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Park, Yu-Ri, Jeong-A. Yu, and Joon-Seop Kim. "Aggregation Behavior of Na-Neutralized Styrene-Ran-Methacrylic Acid Copolymers in Aqueous Solution." Journal of Nanoscience and Nanotechnology 7, no. 11 (2007): 3920–25. http://dx.doi.org/10.1166/jnn.2007.088.

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The aggregation behavior of un-neutralized, partly and fully Na-neutralized poly(styrene-ranmethacrylic acid) copolymers in aqueous solution was investigated using a SEM technique. It was observed that the un-neutralized copolymer formed spherical particles on the Si wafer, and the average size of particles was ca. 160 nm. The particle sizes did not change much with acid content. Upon the neutralization of the acid groups of the copolymer with NaOH, the copolymer became more hydrophilic, leading to the formation of network-like feature consisting of much smaller particles (<50 nm), compared

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Spontak, Richard J., Steven D. Smith, and Arman Ashraf. "Molecular-weight factors affecting formation of the OBBD morphology in block copolymer blends." Proceedings, annual meeting, Electron Microscopy Society of America 50, no. 2 (1992): 1028–29. http://dx.doi.org/10.1017/s0424820100129772.

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Microphase-separated diblock copolymers have been known since 1970 to exhibit three principal morphologies. These morphologies depend on the composition of the copolymer and include dispersed spheres of the minor component on either a BCC or FCC lattice, dispersed cylinders of the minor component on a hexagonal lattice, or alternating lamellae. Recent microstructural studies of starblock and diblock copolymers have shown that an ordered bicontinuous morphology is observed between the lamellar and cylindrical regimes. This microstructure is currently referred to as the ordered bicontinuous doub

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Toprakci, Ozan, Mukaddes Sevval Cetin, and Hatice Aylin Karahan Toprakci. "Production of Styrene-[Ethylene-(Ethylene-Propylene)]-Styrene Block Copolymer (SEEPS) Microfibers by Electrospinning." Material Science Research India 18, no. 1 (2021): 27–36. http://dx.doi.org/10.13005/msri/180104.

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Thermoplastic elastomer-based fibers have many advantages including lightness, flexibility, resilience. Styrene-[ethylene-(ethylene-propylene)]-styrene (SEEPS) is a styrenic block copolymer based thermoplastic elastomer and it can be used for many applications with many functions as a matrix, compatibilizer, modifier or adhesive. It has good resistance to oxidizing agents, weathering, aging, and it can be used under various conditions. In this study, SEEPS block copolymer fibers were electrospun. This study is the first study about the electrospinning of SEEPS block copolymer in the literature

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42

Tanaka, Yasuyuki, Yasunobu Nakafutami, Yasushi Kashiwazaki, Junichi Adachi, and Kaoru Tadokoro. "Sequence Structure of Styrene-Butadiene Copolymer Determined by Ozonolysis-HPLC Method." Rubber Chemistry and Technology 60, no. 2 (1987): 207–16. http://dx.doi.org/10.5254/1.3536125.

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Abstract The configurational sequence of styrene units and the arrangement of styrene and 1,2-butadiene units in styrene-butadiene copolymers were characterized by 1H- and 13C-NMR analysis of the ozonolysis products which were separated by a combination of GPC and HPLC. The ozonolysis products from diad and triad styrene sequences flanked by 1,4-butadiene units showed two and three peaks in HPLC, respectively, reflecting the diad and triad tacticity. The probability of racemic addition was found to be 0.56 and 0.58 for radical and anionic SBR, respectively. The ozonolysis products from styrene

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Lazzari, Massimo, and Mercedes Torneiro. "A Global View on Block Copolymers." Polymers 12, no. 4 (2020): 869. http://dx.doi.org/10.3390/polym12040869.

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In this systematic review, a total of 45,143 publications on block copolymers, issued between 1952 and 2019, are analyzed in terms of number, source, language, institution, country, keywords, and block copolymer type, to find out their evolution and predict research trends. The number of publications devoted to block copolymers has been growing for over six decades, maintaining a consistent level throughout the last few years. In their majority, documents came out of the United States, although more recently, Chinese institutions are those displaying the largest production. Keywords analysis i

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Sukhareva, Ksenia V., Anastasia D. Buluchevskaya, Valeria O. Besedina, Yuliana V. Grosheva, Lydmila R. Lyusova, and Anatoly A. Popov. "EFFECTS OF POLYCHLORINATED N-ALKANES ON THE CHEMICAL STRUCTURE, MECHANICAL AND THERMAL PROPERTIES OF THE STYRENE-BUTADIENE STYRENE TRIBLOCK COPOLYMER." ChemChemTech 67, no. 6 (2024): 100–108. http://dx.doi.org/10.6060/ivkkt.20246706.6973.

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The development of new functional materials based on modified styrene-butadiene block copolymers will enable the creation of materials with improved resistance to gasoline, heat, light, ozone, and enhanced adhesive properties. This study investigates the influence of chlorinated paraffin on the properties of the styrene-butadiene-styrene triblock copolymer. Chlorinated paraffins (CP), complex mixtures of polychlorinated n-alkanes, were used as halogen-containing modifiers for the thermoplastic elastomer to enhance its tensile and adhesive strength and thermal properties. Composite materials ba

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45

Azimi, Hamid Reza, Mostafa Rezaei, and Mostafa Salehi. "The effect of copolymer composition on the batch foaming dynamics of styrene/methylmethacrylate copolymers." Journal of Thermoplastic Composite Materials 30, no. 1 (2016): 47–66. http://dx.doi.org/10.1177/0892705715575095.

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In this work, styrene/methyl methacrylate (St/MMA) copolymer particles were synthesized by suspension polymerization process with different copolymer compositions to study the visual batch foaming dynamics. The visualization system consisted of the self-sealing observation cell equipped to the pressure and temperature controller. The synthesized copolymer particles were impregnated by n-pentane, followed by recording of particle expansion. The cell structure of foams was studied by scanning electron microscopy. The effect of different foaming conditions on the expansion behavior of copolymers

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Vahabova, V. A., A. F. Mammadova, and K. Q. Guliyev. "SYNTHESIS OF PARA-AMINOPHENYL CYCLOPROPYLMETHACRYLATE AND ITS RADICAL COPOLYMERIZATION WITH STYRENE." Azerbaijan Chemical Journal, no. 2 (June 19, 2023): 134–37. http://dx.doi.org/10.32737/0005-2531-2023-2-131-137.

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The synthesis of a new monomer para-aminophenyl cyclopropyl methacrylate (APCM) was carried out, its radical copolymerization with styrene was investigated and some regularities of the process were studied. Its radical copolymerizations with styrene were carried out and the resulting copolymers were established in the structures. Based on the IR-NMR and UV spectra, it was found that the copolymerization process of para-aminophenyl cyclopropyl methacrylate proceeds through the double bond, and the substituents, para-aminophenyl cyclopropyl fragment, remain in the side macrochain. The values of

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47

Ghebremeskel, Ghebrehiwet N., J. K. Sekinger, J. L. Hoffpauir, and C. Hendrix. "A Study of the Thermal Degradation Products of Styrene-Butadiene Type Rubber by Pyrolysis/GC/MS." Rubber Chemistry and Technology 69, no. 5 (1996): 874–84. http://dx.doi.org/10.5254/1.3538409.

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Abstract Pyrolysis coupled with GC/MS was used to study thermal degradation products of styrene—butadiene rubber (SBR). Introduction of samples, using the pyrolysis carrier gas through the split injection port, followed by sub-ambient focusing of pyrolysis products gave reproducible chromatograms. The styrene content of styrene—butadiene copolymer was determined by plotting the GC areas of styrene and butadiene dimer (4-vinlycyclohexene) vs the percent bound styrene measured by refractive index and infrared spectroscopy. The accuracy and ease of use of the technique in determining the styrene

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48

Yamaoka, Ikuro. "Anisotropic behaviour of styrene-butadiene-styrene triblock copolymer/methyl methacrylate-styrene copolymer blends." Polymer 39, no. 5 (1998): 1081–93. http://dx.doi.org/10.1016/s0032-3861(97)00399-6.

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Kim, Seon-Mi, Sang Suk Han, A. Young Kim, et al. "Anti-Biofouling Effect of PEG-Grafted Block Copolymer Synthesized by RAFT Polymerization." Journal of Nanoscience and Nanotechnology 15, no. 10 (2015): 7866–70. http://dx.doi.org/10.1166/jnn.2015.11216.

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Poly(glycidyl methacrylate-block-styrene) (PGMA-b-PS), a block copolymer consisting of glycidyl methacrylate and styrene, was synthesized via reversible addition-fragmentation chain transfer living polymerization. The synthesized PGMA-b-PS was then grafted with low-molecular-weight polyethylene glycol (PEG) via epoxy ring opening to give PGMA-g-PEG-b-PS, which was evaluated as an anti-biofouling coating material. As a preliminary test for the anti-biofouling effect, a protein adsorption experiment was performed on the synthesized block copolymer surface. The block copolymers were spin-coated o

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Bluhm, T. L., and M. D. Whitmore. "Styrene/butadiene block copolymer micelles in heptane." Canadian Journal of Chemistry 63, no. 1 (1985): 249–52. http://dx.doi.org/10.1139/v85-041.

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The radius of gyration of poly(styrene-b-butadiene) block copolymer micelles in n-heptane is measured by small angle X-ray scattering (SAXS). The results are compared with theoretical predictions, and good agreement is found, particularly for the appropriate scaling relations. It is argued that the radius of gyration of the micelles depends on both the molecular weight and the composition of the copolymers. The dominant factors which determine the micelle core and corona dimensions are identified.

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