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Journal articles on the topic 'Polyester copolymer'

Author: Grafiati

Published: 4 June 2021

Last updated: 13 February 2022

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1

KOBAYASHI, Takuma, and Touru MIZUGAMI. "Heat Durability of Polyester-Polyester Block Copolymer." KOBUNSHI RONBUNSHU 50, no. 7 (1993): 543–49. http://dx.doi.org/10.1295/koron.50.543.

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2

Demina, Tatiana S., Maria G. Drozdova, Chantal Sevrin, et al. "Biodegradable Cell Microcarriers Based on Chitosan/Polyester Graft-Copolymers." Molecules 25, no. 8 (2020): 1949. http://dx.doi.org/10.3390/molecules25081949.

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Self-stabilizing biodegradable microcarriers were produced via an oil/water solvent evaporation technique using amphiphilic chitosan-g-polyester copolymers as a core material in oil phase without the addition of any emulsifier in aqueous phase. The total yield of the copolymer-based microparticles reached up to 79 wt. %, which is comparable to a yield achievable using traditional emulsifiers. The kinetics of microparticle self-stabilization, monitored during their process, were correlated to the migration of hydrophilic copolymer’s moieties to the oil/water interface. With a favorable surface/

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3

Burkeev, M. Zh, A. Zh Sarsenbekova, A. N. Bolatbay, et al. "The use of differential calculation methods for the destruction of copolymers of polyethylene glycol fumarate with the acrylic acid." Bulletin of the Karaganda University. "Chemistry" series 99, no. 3 (2020): 4–10. http://dx.doi.org/10.31489/2020ch3/4-10.

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In this work, the thermal decomposition of copolymers based on polyethylene glycol fumarate with the acrylic acid using various ratios of initial monomers has been studied for the first time. The samples were studied in air and nitrogen. According to the thermograms analysis, it was found that the copolymer sample decomposition begins at higher temperatures for a copolymer with high content of polyester resin. The copolymer is vigorously oxidized by the oxygen when heated in air, and one can observe almost complete sample decomposition, whereas it decomposes with a residue of ~ 15% in an inert

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4

Nguyen, Sophie. "Graft copolymers containing poly(3-hydroxyalkanoates) — A review on their synthesis, properties, and applications." Canadian Journal of Chemistry 86, no. 6 (2008): 570–78. http://dx.doi.org/10.1139/v08-044.

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The use of the poly(3-hydroxyalkanoates) in copolymer synthesis has received much interest, as the microbial polyester segments can bring interesting properties, such as biodegradability and biocompatibility. The synthesis, properties, and applications of graft copolymers containing poly(3-hydroxyalkanoates) as main chain or branches are reviewed here, with emphasis on the different preparation methods, which fit into the three main synthesis strategies of graft copolymers: “grafting onto”, “grafting from”, and “grafting through” or macromonomer methods.Key words: poly(3-hydroxyalkanoates), gr

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5

Lee, Hee Young, Heidy Cruz, and Younggon Son. "Effects of incorporation of polyester on the electrical resistivity of polycarbonate/multi-walled carbon nanotube nanocomposite." Journal of Composite Materials 53, no. 10 (2018): 1291–98. http://dx.doi.org/10.1177/0021998318801932.

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In this work, we present the effect of incorporation of polyester on the electrical properties of injection-molded polycarbonate/multi-walled carbon nanotube nanocomposites. The study was conducted by melt-mixing polycarbonate, multi-walled carbon nanotube, and three types of polyesters: polybutylene terephthalate, polyethylene terephthalate, and liquid crystal polymer. It was found that the volume resistivities of injection-molded composites containing 2 phr polyester significantly decreased because of the transesterification reaction between the polycarbonate and polyester. The resulting pol

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6

Kupczak, Maria, Anna Mielańczyk, and Dorota Neugebauer. "The Influence of Polymer Composition on the Hydrolytic and Enzymatic Degradation of Polyesters and Their Block Copolymers with PDMAEMA." Materials 14, no. 13 (2021): 3636. http://dx.doi.org/10.3390/ma14133636.

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Well-defined, semi-degradable polyester/polymethacrylate block copolymers, based on ε-caprolactone (CL), d,l-lactide (DLLA), glycolide (GA) and N,N′-dimethylaminoethyl methacrylate (DMAEMA), were synthesized by ring-opening polymerization (ROP) and atom transfer radical polymerization. Comprehensive degradation studies of poly(ε-caprolactone)-block-poly(N,N′-dimethylaminoethyl methacrylate) (PCL-b-PDMAEMA) on hydrolytic degradation and enzymatic degradation were performed, and those results were compared with the corresponding aliphatic polyester (PCL). The solution pH did not affect the hydro

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7

Zhou, Hao, Qing Hong Liang, Xiang Ke Shi, Li Hua Lu, Li Qun Zhang, and Dong Mei Yue. "Self-Assemble Behavior of Amphiphilic Diblock Copolymer of Methoxy Poly (Ethylene Glycol)/Polyester." Advanced Materials Research 295-297 (July 2011): 11–15. http://dx.doi.org/10.4028/www.scientific.net/amr.295-297.11.

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Amphiphilic diblock copolymers based on methoxy polyethylene glycol (MePEG), 1, 6-hexanediol and maleic anhydride with different molar composition were synthesized by solution polycondensation. Self-assemble behavior of amphiphilic diblock copolymer in different solvents by dialyzing technique was discussed. The micelle morphologhy was observed by TEM. It was found that well core-shell MePEG1900/Polyester 2162 copolymer nanoparticles can be formed by self-assemble in acetone solution. In addition, the size of nanospheres measured using dynamic light scattering exhibited a narrow monodisphere s

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8

Saade, H., R. Díaz de León-Gómez, M. E. Treviño, et al. "Performance of Cotton, Cotton-Polyester, and Polyester-Elastane Fabrics Impregnated with Ultrafine Polymeric Nanoparticles Loaded with Lavender Oil." Journal of Nanomaterials 2021 (February 17, 2021): 1–10. http://dx.doi.org/10.1155/2021/6665327.

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Lavender oil- (LO-) loaded ultrafine nanoparticles (NP) ( diameter < 50 nm ) of a copolymer were used for impregnating fabrics of cotton, cotton polyester, and polyester-elastane. The copolymer was composed mainly of methyl methacrylate (MMA) units with a low proportion of methacrylic acid (MAA). Moreover, two kinds of NP were used: one containing uncrosslinked copolymer and another one composed of crosslinked material. All the fabrics impregnated with NP of uncrosslinked copolymer keep the aroma up to 25 washes. Under storage at ambient conditions, the fabrics impregnated with NP of either

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9

Tarabukina, Elena, Emil Fatullaev, Anna Krasova, et al. "Synthesis, Structure, Hydrodynamics and Thermoresponsiveness of Graft Copolymer with Aromatic Polyester Backbone at Poly(2-isopropyl-2-oxazoline) Side Chains." Polymers 12, no. 11 (2020): 2643. http://dx.doi.org/10.3390/polym12112643.

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New thermoresponsive graft copolymers with an aromatic polyester backbone and poly(2-isopropyl-2-oxazoline) (PiPrOx) side chains are synthesized and characterized by NMR and GPC. The grafting density of side chains is 0.49. The molar masses of the graft-copolymer, its backbone, side chains, and the modeling poly-2-isopropyl-2-oxaziline are 74,000, 19,000, 4300, and 16,600 g·mol−1, respectively. Their conformational properties in nitropropane as well as thermoresponsiveness in aqueous solutions are studied and compared with that of free side chains, i.e., linear PiPrOx with a hydrophobic termin

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10

Kawasaki, Hidetoshi, Toshiyuki Anan, Eishu Kimura, and Yoshio Oyumi. "BAMO/NMMO Copolymer with Polyester Initiation." Propellants, Explosives, Pyrotechnics 22, no. 2 (1997): 87–92. http://dx.doi.org/10.1002/prep.19970220208.

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11

Zhang, Heng, Xiao Ze Jiang, Xiao Yun Pan, et al. "Exploring the Effect of Molecular Components on Hydrolysis-Resistance Performance and Hydrophilicity of Amphiphilic Poly(Ester-Block-Ether) Copolymers." Materials Science Forum 848 (March 2016): 99–110. http://dx.doi.org/10.4028/www.scientific.net/msf.848.99.

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In this study, four poly (ester-block-ether) copolymers were synthesized via the macromolecular transesterification method from different hydrophobic polyester segments prepared from precursors, dimethyl terephthalate (DMT), ethylene glycol (EG), dimethyl-5-hydroxyisophthalate (DHIP) and neopentyl glycol (NPG), and hydrophilic polyether, polyethylene glycol (PEG) or polyetheramine (PEA). The hydrolysis-resistance performance at alkaline condition and hydrophilicity of these four synthetic poly (ester-block-ether) copolymers were characterized by hydrolysis degree and water solubility with Nucl

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12

Ünlü, Cüneyt, Eric Pollet та Luc Avérous. "Original Macromolecular Architectures Based on poly(ε-caprolactone) and poly(ε-thiocaprolactone) Grafted onto Chitosan Backbone". International Journal of Molecular Sciences 19, № 12 (2018): 3799. http://dx.doi.org/10.3390/ijms19123799.

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Polyester and/or polythioester grafted chitosan copolymers were synthesized. For that, poly(ε-caprolactone) (PCL), poly(ε-thiocaprolactone) (PTCL), and their copolymers were first synthesized by ring opening polymerization. Copolymers with caprolactone:thiocaprolactone (CL:TCL) molar ratios of 2:1, 1:1, 1:2 were synthesized. All of the synthesized macromolecular architectures were characterized using different spectral (Fourier transform infrared (FTIR), proton nuclear magnetic resonance (1H-NMR), X-Ray diffraction (XRD)) and thermal (Differential scanning calorimetry (DSC), Thermogravimetric

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13

Qiang, Na, Shuo Tang, Xiang Liao, Hao Liang, Fang Xie, and Ji-xiang Zhu. "Synthesis of Functional Polyester Based on Polylactic Acid and Its Effect on PC12 Cells after Coupling with Small Peptides." International Journal of Polymer Science 2016 (2016): 1–6. http://dx.doi.org/10.1155/2016/9829757.

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Polyesters containing functional groups are a suitable candidate matrix for cell culture in tissue engineering. Three types of semicrystalline copolymer poly(L-lactide-co-β-malic acid) [P(LA-co-BMD)] with pendent carboxyl groups were synthesized in this study. The functional monomer 3(S)-[(benzyloxycarbonyl)methyl]-1,4-dioxane-2,5-dione (BMD) was synthesized usingL-aspartic acid. The copolymer P(LA-co-BMD) was then synthesized through ring-opening copolymerization ofL-LA and BMD, with dodecanol as initiator and stannous octoate as catalyst. Copolymer structure was characterized by1H nuclear ma

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14

Wang, Ya’nan, Xiaofang Lin, Zhengbiao Zhang, Jian Zhu, Xiangqiang Pan та Xiulin Zhu. "A Novel Synthesis of Poly(Ester-Alt-Selenide)s by Ring-Opening Copolymerization of γ-Selenobutyrolactone and Epoxy Monomer". Polymers 12, № 5 (2020): 1203. http://dx.doi.org/10.3390/polym12051203.

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Ring-opening copolymerization (ROCOP) is an effective means to prepare functionalized polyester. In this work, a type of selenide-containing polyesters with controllable structure, molecular weight, and molecular weight distribution was successfully prepared by ROCOP of γ-selenobutyrolactone and epoxy compounds. The influence of the catalyst, solvent, and reaction temperature on the reaction efficiency was examined. Then, kinetic study was investigated under an optimized condition. The structure of the copolymers was carefully characterized by nuclear magnetic resonance (NMR), 1H NMR, 13C NMR,

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15

Todea, Anamaria, Emese Biro, Valentin Badea та ін. "Optimization of enzymatic ring-opening copolymerizations involving δ-gluconolactone as monomer by experimental design". Pure and Applied Chemistry 86, № 11 (2014): 1781–92. http://dx.doi.org/10.1515/pac-2014-0717.

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Abstract Enzymatic incorporation of carbohydrate-derived monomer units into hydrophobic polyester backbones represents a promising alternative to obtain new biodegradable oligomers and polymers. Immobilized lipases are efficient biocatalysts for copolymerization of β-butyrolactone and δ-gluconolactone, but only a systematic optimization study was able to highlight the influence of the main reaction parameters on the polymerization degree and on the relative copolymer content of the product. Therefore, experimental design was employed for determination of the optimal ring-opening copolymerizati

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16

Duivenvoorde, Francis L., Jozua Laven, and Rob van der Linde. "Diblock copolymer dispersants in polyester powder coatings." Progress in Organic Coatings 45, no. 2-3 (2002): 127–37. http://dx.doi.org/10.1016/s0300-9440(02)00046-2.

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17

Neffe, Axel, Victor Izraylit, Paul Hommes-Schattmann, and Andreas Lendlein. "Soft, Formstable (Co)Polyester Blend Elastomers." Nanomaterials 11, no. 6 (2021): 1472. http://dx.doi.org/10.3390/nano11061472.

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High crystallization rate and thermomechanical stability make polylactide stereocomplexes effective nanosized physical netpoints. Here, we address the need for soft, form-stable degradable elastomers for medical applications by designing such blends from (co)polyesters, whose mechanical properties are ruled by their nanodimensional architecture and which are applied as single components in implants. By careful controlling of the copolymer composition and sequence structure of poly[(L-lactide)-co-(ε-caprolactone)], it is possible to prepare hyperelastic polymer blends formed through stereocompl

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18

Montava-Jorda, Sergi, Diego Lascano, Luis Quiles-Carrillo, et al. "Mechanical Recycling of Partially Bio-Based and Recycled Polyethylene Terephthalate Blends by Reactive Extrusion with Poly(styrene-co-glycidyl methacrylate)." Polymers 12, no. 1 (2020): 174. http://dx.doi.org/10.3390/polym12010174.

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In the present study, partially bio-based polyethylene terephthalate (bio-PET) was melt-mixed at 15–45 wt% with recycled polyethylene terephthalate (r-PET) obtained from remnants of the injection blowing process of contaminant-free food-use bottles. The resultant compounded materials were thereafter shaped into pieces by injection molding for characterization. Poly(styrene-co-glycidyl methacrylate) (PS-co-GMA) was added at 1–5 parts per hundred resin (phr) of polyester blend during the extrusion process to counteract the ductility and toughness reduction that occurred in the bio-PET pieces aft

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19

Garg, S. N., and A. Misra. "Crystallization behavior of a polyester–polyamide block copolymer." Journal of Polymer Science: Polymer Letters Edition 23, no. 1 (1985): 27–31. http://dx.doi.org/10.1002/pol.1985.130230106.

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20

Kuhnt, Tobias, Ramiro Marroquín García, Sandra Camarero-Espinosa, et al. "Poly(caprolactone-co-trimethylenecarbonate) urethane acrylate resins for digital light processing of bioresorbable tissue engineering implants." Biomaterials Science 7, no. 12 (2019): 4984–89. http://dx.doi.org/10.1039/c9bm01042d.

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21

Builes, D. H., and A. Tercjak. "Effect of carboxylated poly(ethylene oxide-b-propylene oxide-b-ethylene oxide) block copolymer on nanostructured unsaturated polyester resin." RSC Advances 5, no. 116 (2015): 96170–80. http://dx.doi.org/10.1039/c5ra18290e.

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22

Thammawong, C., Atitsa Petchsuk, Mantana Opaprakasit, N. Chanunpanich, Pramuan Tangboriboonrat, and Pakorn Opaprakasit. "Preparation and Characterizations of Electrospun Lactide-Based Polymeric Nanofibers." Advanced Materials Research 93-94 (January 2010): 377–80. http://dx.doi.org/10.4028/www.scientific.net/amr.93-94.377.

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Poly(L)lactide (PLLA), aliphatic polyester, and poly(LLA-co-DLLA) copolymers consisting of 2.5, 7.5, 50% of DLLA content were also synthesized. PLLA was successfully electrospun by using 15wt% solution in (1DMF:3CHCl3) mixed solvent. 2.5, 7.5, 50% P(LLA-co-DLLA) copolymers were then spun at 8, 10, and 15wt% concentration in a single chloroform solvent, respective. The lactide-based polymeric nanofibers were characterized by Scanning Electron Microscope (SEM). Smooth surface morphology was observed in nanofibers produced from PLLA and 50% P(LLA-co-DLLA) copolymer. However, surface porosity was

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23

Li, Hongjuan, Siyuan Xu, Jing Li, et al. "Biodegradable all polyester-based multiblock copolymer elastomers with controlled properties." Polymer Chemistry 12, no. 12 (2021): 1837–45. http://dx.doi.org/10.1039/d1py00076d.

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24

Li, L. S., and S. I. Stupp. "Phase transitions of a comb-shaped side-chain polyester: An electron diffraction study." Proceedings, annual meeting, Electron Microscopy Society of America 49 (August 1991): 1048–49. http://dx.doi.org/10.1017/s042482010008955x.

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In order to reveal the phase transition sequence of aromatic polyesters and to characterize each phase appearing during heating, a comb-shaped side-chain polyester has been studied using electron diffraction techniques at room and higher temperatures. The chemical structure of the polyester is shown below,Fig. 1 is an electron diffraction pattern of two layers of the polymer, showing a chiral smectic E phase at room temperature. In this phase each layer consists of three orthorhombic lattices with orientations related to each other by rotations of ±60° as in a smectic E phase. However, there i

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25

Saner, B., Y. Z. Menceloglu, and N. Bilgin Oncu. "Branched Pentablock Poly(L-lactide-co-∊-caprolactone) Synthesis in scCO2." High Performance Polymers 19, no. 5-6 (2007): 649–64. http://dx.doi.org/10.1177/0954008307081209.

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Pentablock poly(L-lactide-co-∊-caprolactone) (PLLA/PCL), with a central fluorinated segment and four PLLA/PCL side chains was synthesized by sequential ring-opening polymerization (ROP) with stannous octoate catalyst in an environmentally benign and clean medium, scCO2. Copolymers of PLLA and PCL are extensively researched for biomedical applications. Fluorinated hydrocarbons are similarly promising for biomedicine, and especially for oxygen-carrying substitute applications. Initially, a fluorinated reactive triblock stabilizer (prepolymer, PCL-FLKT-PCL) with inner fluorinated segment and PCL

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26

Wang, Shen-Guo, Chuan-Fu Chen, Zhi-Fen Li, Xue-Fen Li, and Han-Qing Gu. "Mixed Polyether-Polyester Multiblock Copolymer and its Blood Compatibility." Journal of Macromolecular Science: Part A - Chemistry 26, no. 2-3 (1989): 505–18. http://dx.doi.org/10.1080/00222338908051990.

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27

Guo, Li, Zhijie Zhang, Yangping Zhu, Junping Li, and Zemin Xie. "Synthesis of polysiloxane–polyester copolymer by lipase-catalyzed polycondensation." Journal of Applied Polymer Science 108, no. 3 (2008): 1901–7. http://dx.doi.org/10.1002/app.27807.

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28

Gao, Chengyong, Tieling Xing, Xueni Hou, and Guoqiang Chen. "Preparation of disperse inks for direct inkjet printing of non-pretreated polyester fabrics." RSC Advances 9, no. 34 (2019): 19791–99. http://dx.doi.org/10.1039/c9ra01999e.

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The preparation of disperse inks for direct inkjet printing was carried out using disperse dye, dispersant (TD-1109, hydrophilic polyacrylic acid block copolymer), wetting agent (DEG and EG), water-based polymers (PVA or waterborne polyester), deionized water, etc.

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29

Nikolic, Marija, Dejan Poleti, and Jasna Djonlagic. "Biodegradable polyesters based on succinic acid." Chemical Industry 57, no. 11 (2003): 526–35. http://dx.doi.org/10.2298/hemind0311526n.

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Two series of aliphatic polyesters based on succinic acid were synthesized by copolymerization with adipic acid for the first series of saturated polyesters, and with fumaric acid for the second series. Polyesters were prepared starting from the corresponding dimethyl esters and 1,4-butanediol by melt transesterification in the presence of a highly effective catalyst tetra-n-butyl-titanate, Ti(0Bu)4. The molecular structure and composition of the copolyesters was determined by 1H NMR spectroscopy. The effect of copolymer composition on the physical and thermal properties of these random polyes

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30

Liang, Qing Hong, Dong Mei Yue, and Xiao Yu Li. "Synthesis of Amphiphilic Diblock Copolymer of Methoxy Poly(ethylene glycol)-b-polyester and Its Self-Assemble Behavior." Advanced Materials Research 11-12 (February 2006): 643–48. http://dx.doi.org/10.4028/www.scientific.net/amr.11-12.643.

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Amphiphilic diblock copolymer was synthesized in one-step or two-step process by using of methoxy polyethylene glycol (MePEG), 1,6-hexanediol and maleic anhydride and characterized by FTIR and GPC. IR spectrum of amphiphilic diblock copolymer confirmed that MePEG had grafted on polyester. Solution polycondensation, melt polycondensation, mode of adding monomers and reaction time were studied on effect of molecular weight and its distribution. The GPC results showed that fairly narrow molecular weight distribution was obtained in solution polycondensation by one-step process. In addition, self-

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31

Shaw, Zachary, Arth Patel, Thai Butcher, Tuhina Banerjee, Ren Bean, and Santimukul Santra. "Pseudo-branched polyester copolymer: an efficient drug delivery system to treat cancer." Biomaterials Science 8, no. 6 (2020): 1592–603. http://dx.doi.org/10.1039/c9bm01475f.

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New aliphatic pseudo-branched polyester copolymers are synthesized from diethylmalonate. The formulated nanomedicine successfully encapsulates therapeutic drug in higher dosage and deliver specifically to cancer cells for diagnosis and treatment.

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32

Yan, Mengyu, Yunyun Lu, Na Li, et al. "Hyperbranch-Crosslinked S-SEBS Block Copolymer Membranes for Desalination by Pervaporation." Membranes 10, no. 10 (2020): 277. http://dx.doi.org/10.3390/membranes10100277.

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Sulfonated aromatic polymer (SAP) featuring hydrophilic nanochannels for water transport is a promising membrane material for desalination. SAPs with a high sulfonation degree favor water transport but suffer from reduced mechanical strength and membrane swelling. In this work, a hyperbranched polyester, H302, was introduced to crosslink a sulfonated styrene-ethylene/butylene-styrene (S-SEBS) copolymer membrane. The effects of crosslinking temperature and amount of H302 on the microstructure, and the pervaporation desalination performance of the membrane, were investigated. H302/S-SEBS copolym

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33

Fu, Tsai-Sheng, Yu-Hong Wei, Po-Yuan Cheng, I.-Ming Chu, and Wei-Chuan Chen. "A Novel Biodegradable and Thermosensitive Poly(Ester-Amide) Hydrogel for Cartilage Tissue Engineering." BioMed Research International 2018 (December 19, 2018): 1–12. http://dx.doi.org/10.1155/2018/2710892.

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Thermosensitive hydrogels are attractive alternative scaffolding materials for minimally invasive surgery through a simple injection and in situ gelling. In this study, a novel poly(ester-amide) polymer, methoxy poly(ethylene glycol)-poly(pyrrolidone-co-lactide) (mPDLA, P3L7) diblock copolymer, was synthesized and characterized for cartilage tissue engineering. A series of amphiphilic diblock copolymers was synthesized by ring-opening polymerization of mPEG 550, D,L-lactide, and 2-pyrrolidone. By dynamic light scattering analysis and tube-flipped-upside-down method, viscoelastic properties of

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34

Mikes, Petr, Jana Horakova, Ales Saman, et al. "Comparison and characterization of different polyester nano/micro fibres for use in tissue engineering applications." Journal of Industrial Textiles 50, no. 6 (2019): 870–90. http://dx.doi.org/10.1177/1528083719848155.

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The study focuses on a comparison of the electrospinning of various polylactide and polycaprolactone (PLCL) copolymers and poly-L-lactide (PLLA) and polycaprolactone (PCL) homopolymers. The chemical characterisation, electrospinnability, fibrous morphology, degradation rate and interactions with fibroblasts were assessed with respect to copolymers and homopolymers with both lower (around 50,000) and higher (around 95,000) molecular weights. The research investigated commercially available as well as synthesised copolymers. The results revealed that the electrospinnability of polymeric solution

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35

Arnould, Mark A., Rafael Vargas, Rita W. Buehner, and Chrys Wesdemiotis. "Tandem Mass Spectrometry Characteristics of Polyester Anions and Cations Formed by Electrospray Ionization." European Journal of Mass Spectrometry 11, no. 2 (2005): 243–56. http://dx.doi.org/10.1255/ejms.746.

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Electrospray ionization of polyesters composed of isophthalic acid and neopentyl glycol produces carboxylate anions in negative mode and mainly sodium ion adducts in positive mode. A tandem mass spectrometry (MS/MS) study of these ions in a quadrupole ion trap shows that the collisionally-activated dissociation pathways of the anions are simpler than those of the corresponding cations. Charge-remote fragmentations predominate in both cases, but the spectra obtained in negative mode are devoid of the complicating cation exchange observed in positive mode. MS/MS of the Na+ adducts gives rise to

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36

Kobayashi, Takuma, Atsushi Kaji, and Hironobu Kitagawa. "The Influence of Feed Ratio of Starting Material on the Character of Polyester-Polyester Block Copolymer." Sen'i Gakkaishi 49, no. 1 (1993): 32–40. http://dx.doi.org/10.2115/fiber.49.32.

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Duale, Khadar, Piotr Latos, Anna Chrobok та ін. "Towards Advances in Molecular Understanding of Boric Acid Biocatalyzed Ring-Opening (Co)Polymerization of δ-Valerolactone in the Presence of Ethylene Glycol as an Initiator". Molecules 26, № 16 (2021): 4859. http://dx.doi.org/10.3390/molecules26164859.

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Following our previous studies on the molecular level structure of (co)oligoesters obtained via anionic homo- and co-polymerization of novel β-substituted β-lactones, prepared by the atmospheric pressure carbonylation reaction of respective epoxides, the boric acid biocatalyzed ring-opening (co)polymerization of δ-valerolactone has been studied. As a co-monomer the 6-methy-ε-caprolactone, prepared by the one-pot oxidation of respective alcohol, and ethylene glycol as polymerization initiator were used. The obtained copolymers were characterized by 1H-NMR, GPC and ESI-MS, respectively in order

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38

Masuko, Toru, Ichiro Morita, and Koichiro Yonetake. "FINE-STRUCTURAL CHANGES IN DEFORMED POLYESTER/POLYETHER BLOCK COPOLYMER FILMS." Sen'i Gakkaishi 42, no. 9 (1986): T491—T498. http://dx.doi.org/10.2115/fiber.42.9_t491.

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39

Yonetake, Koichiro, Ichiro Morita, and Toru Masuko. "SORPTION OF DISPERSE DYES BY POLYESTER/POLYETHER BLOCK COPOLYMER FILMS." Sen'i Gakkaishi 42, no. 9 (1986): T499—T506. http://dx.doi.org/10.2115/fiber.42.9_t499.

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Yonetake, Koichiro, Tadayosi Koizumi, and Toru Masuko. "Fine-structural changes in redrawn polyester/polyether block copolymer films." Sen'i Gakkaishi 44, no. 12 (1988): 597–605. http://dx.doi.org/10.2115/fiber.44.12_597.

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Godovskii, Yu K., Ye V. Konyukhova, and S. N. Chvalun. "Thermodynamics of the deformation of a block polyether-polyester copolymer." Polymer Science U.S.S.R. 28, no. 9 (1986): 2061–67. http://dx.doi.org/10.1016/0032-3950(86)90362-x.

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Li, Mengmeng, Lin Zhou, Ziqi Zhang, et al. "One-step synthesis of poly(methacrylate)-b-polyester via “one organocatalyst, two polymerizations”." Polymer Chemistry 12, no. 35 (2021): 5069–76. http://dx.doi.org/10.1039/d1py00892g.

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In a “one organocatalyst, two polymerizations” system, triarylsulfonium hexafluorophosphate salt could spontaneously catalyze photo-ATRP and ROP. A well-defined PTMC-b-PMMA block copolymer was successfully synthesized in one-step.

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Wang, Tao, Xian Lin Xu, Xiao Yang Sui, and Li Na Wang. "The Antistatic Research of Polyester/Nylon Fabrics Finished by Triblock Copolymer Containing Organic Silicon." Advanced Materials Research 535-537 (June 2012): 1569–72. http://dx.doi.org/10.4028/www.scientific.net/amr.535-537.1569.

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Polyester/nylon blend fabric has some advantages, such as high strength, excellent drapability, but the biggest drawback of the blend fabric is the easily formed electrostatic. In this paper, the blend fabric was finished with the triblock copolymer containing organic silicon to improve the antistatic property of the fabric. The influence of the concentration of the finishing agent on the antistatic property was studied emphasisly. And the effect of antistatic, the feeling and the color fastness were analyzed. The results show that the finishing agent of triblock copolymer containing hydrophil

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Liu, Bo, Xiaofang Zhang, Ya Chen та ін. "Enzymatic synthesis of poly(ω-pentadecalactone-co-butylene-co-3,3′-dithiodipropionate) copolyesters and self-assembly of the PEGylated copolymer micelles as redox-responsive nanocarriers for doxorubicin delivery". Polymer Chemistry 6, № 11 (2015): 1997–2010. http://dx.doi.org/10.1039/c4py01321b.

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Valente, M., E. Pettenazzo, L. Di Filippo, F. Laborde, S. Rinaldi та G. Thiene. "Biodegradable Polymer (D,L-Lactide-ε-Caprolactone) in Aortic Vascular Prosthesis: Morphological Evaluation in an Animal Model". International Journal of Artificial Organs 25, № 8 (2002): 777–82. http://dx.doi.org/10.1177/039139880202500805.

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Biodegradable D,L-Lactide-ε-caprolactone copolymer was used in substitution to bovine collagen to seal porosity in nine Dacron vascular Sorin Carbografts®. One served as control and 8 were implanted in mini-pigs as vascular by-pass in the thoracic aorta. The grafts were explanted at 7 days (4 animals), 30 (2 animals) and at 90 days (2 animals), and submitted to gross examination, X-ray, histology and electron microscopy. Aim of the study was to assess the safety and the reliability of these polyester vascular prostheses impregnated with the copolymer in terms of containment of the bleeding in

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Song, Xiuhuan, Xiaoxiao Zhang, Tianduo Li, Zibiao Li, and Hong Chi. "Mechanically Robust Hybrid POSS Thermoplastic Polyurethanes with Enhanced Surface Hydrophobicity." Polymers 11, no. 2 (2019): 373. http://dx.doi.org/10.3390/polym11020373.

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A series of hybrid thermoplastic polyurethanes (PUs) were synthesized from bi-functional polyhedral oligomeric silsesquioxane (B-POSS) and polycaprolactone (PCL) using 1,6-hexamethylene diisocyanate (HDI) as a coupling agent for the first time. The newly synthesized hybrid materials were fully characterized in terms of structure, morphology, thermal and mechanical performance, as well as their toughening effect toward polyesters. Thermal gravimeter analysis (TGA) and differential scanning calorimetry (DSC) showed enhanced thermal stability by 76 °C higher in decomposition temperature (Td) of t

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Kuo, Chung-Feng Jeffrey, Wei-Lun Lan, Shih-Hsiung Chen, Fang-Sian Lin, and Min-Yan Dong. "Development of disperse dye polypropylene fiber and process parameter optimization Part I: development of dyeable polypropylene fiber and parameter optimization." Textile Research Journal 88, no. 1 (2016): 3–13. http://dx.doi.org/10.1177/0040517516673335.

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This study develops polyester modified polypropylene (PP) with disperse dye dyeability. The thermal properties, rheological properties, and spectral properties are used for validation and differential analysis. The optimum PP dyeable particle process uses polyester as the mixed copolymer. The melt temperature of polyester material is significantly different from PP, which may lead to a failure of the mixing process. Therefore, this study aims to develop low-melting co-polyester. Different proportions of adipic acid are used in the co-polyester molecular chain to reduce the melting point. The m

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Xie, Kaifang, Yanfang Xu, Hua Shen, Guangbiao Xu, and Yanxue Ma. "Effect of coating process on morphology, bending rigidity and wearability of polyester harness cords." Journal of Industrial Textiles 50, no. 2 (2019): 187–204. http://dx.doi.org/10.1177/1528083718819865.

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In this article, the harness cords were manufactured by braiding, coating and heat setting at the temperatures of 130 and 195℃, respectively. The film formers used in coating process were poly(butyl acrylate), copolymer size and partial alcoholysis polyvinyl alcohol. The pure film formers' spectra were obtained using in-situ infrared test method on a spectrometer. The scanning electron microscope, bending tester and wearing test device were used to measure the morphology, bending rigidity and wearability of harness cords, respectively. The results showed that the temperature of heat setting ch

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Lefelar, J. A. "Effect of heating and aging on microstructure of polyester-polyamide copolymer." Journal of Polymer Science Part B: Polymer Physics 26, no. 7 (1988): 1469–81. http://dx.doi.org/10.1002/polb.1988.090260710.

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Boyard, N., C. Sinturel, M. Vayer, and R. Erre. "Morphology and cure kinetics of unsaturated polyester resin/block copolymer blends." Journal of Applied Polymer Science 102, no. 1 (2006): 149–65. http://dx.doi.org/10.1002/app.23401.

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