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Relevant bibliographies by topics / Diblock copolymer synthesis

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Academic literature on the topic 'Diblock copolymer synthesis'

Author: Grafiati

Published: 4 June 2021

Last updated: 2 February 2022

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Journal articles on the topic "Diblock copolymer synthesis"

1

Luo, Song, Xinyu Peng, Ying Chen та ін. "Synthesis, characterization, and crystallization of biodegradable poly(ε-caprolactone)-poly(L-lactide) diblock copolymers". e-Polymers 15, № 1 (2015): 15–23. http://dx.doi.org/10.1515/epoly-2014-0155.

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AbstractThree diblock copolymers of PCL6k-PLLA2k, PCL6k-PLLA4k, and PCL6k-PLLA6k were prepared and their crystallization behaviors were investigated. The molecular weights of the copolymers calculated from 1H nuclear magnetic resonance spectra were equivalent to the designed molecular weights. The gel permeation chromatography spectra of the copolymers showed one peak, which revealed that the copolymers were monodisperse. The crystallization capability of poly(ε-caprolactone) (PCL) decreased and that of poly(L-lactide) (PLLA) increased when the molecular weight of the PLLA block was increased

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Pan, Chuan Yi, Yan Yan, Heng De Li, and Sheng Hu. "Synthesis of Bismuth Oxide Nanoclusters from Norbornene Diblock Copolymer Template." Advanced Materials Research 550-553 (July 2012): 777–79. http://dx.doi.org/10.4028/www.scientific.net/amr.550-553.777.

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The synthesis and characterization of well-dispersed Bi2O3 nanoclusters from diblock copolymer are reported. A diblock copolymer template of norbornene derivatives was synthesized using ring-opening metathesis polymerization. By introducing BiCl3 into the diblock copolymer template, the bismuth oxide nanoclusters within the copolymer micelles were achieved by NaOH soaking and water wash. Finally, FTIR and TEM were used to characterize the nanocomposite morphology and the process of oxide formation

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Yao, N., M. Park, C. Harrison, D. H. Adamson, P. M. Chaikin, and R. A. Register. "Tem Studies of Single and Double Microdomain Layers of Block Copolymer." Microscopy and Microanalysis 4, S2 (1998): 818–19. http://dx.doi.org/10.1017/s1431927600024211.

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Diblock copolymers consist of two chemically different polymer chains (or blocks) joined by a covalent bond. Because of the incompatibility between the two blocks and connectivity constraints, diblock copolymers spontaneously self-assemble into microphase-separated nanometer size domains that exhibit ordered morphologies at equilibrium. Commonly observed microdomain morphologies in bulk samples are periodic arrangements of lamellae, cylinders, and spheres. Recent studies show that the thin films of such block copolymers are of great potential for many nanoapplications including nanolithography

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4

Yoneoka, Shuichiro, Ki Park, Yasuhiro Nakagawa, Mitsuhiro Ebara, and Takehiko Tsukahara. "Synthesis and Evaluation of Thermoresponsive Boron-Containing Poly(N-isopropylacrylamide) Diblock Copolymers for Self-Assembling Nanomicellar Boron Carriers." Polymers 11, no. 1 (2018): 42. http://dx.doi.org/10.3390/polym11010042.

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Development of new boron nanocarriers has been a crucial issue to be solved for advancing boron neutron capture therapy (BNCT) as an effective radiation treatment for cancers. The present study aimed to create a novel double-thermoresponsive boron-containing diblock copolymer based on poly(N-isopropylacrylamide) [poly(NIPAAm)], which exhibits two-step phase transitions (morphological transitions) at the temperature region below human body temperature. The boronated diblock copolymer considerably concentrates boron atoms into the water-dispersible (i.e., intravenous-administration possible) nan

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Zhou, Yong, and Bing Liu. "Synthesis and Self-Assembly Behavior of Chiral Amphiphilic Diblock Copolymers Bearing L-Phenylalanine." Advanced Materials Research 345 (September 2011): 334–37. http://dx.doi.org/10.4028/www.scientific.net/amr.345.334.

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Novel chiral amphiphilic diblock copolymers bearing L-phenylalanine was synthesized using a “click” reaction of N3-L-phenylalanine and MPEO-b-PGPE. The structure and composition of copolymers were characterized by 1H-NMR and elemental analysis. Additionally, the self-assembly behavior of these chiral copolymers was investigated in sodium dihydrogen phosphate buffer (pH 4.5): the CMC of copolymer MPEO-b-PGTP determined by the measurement of surface tension was 2.1 mg/mL; the size and morphology of the micelles were studied using TEM; the specific optical rotation ([α]25D) of the micellar soluti

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Yuan, Bing, Xin He, Yaqing Qu, Chengqiang Gao, Erika Eiser, and Wangqing Zhang. "In situ synthesis of a self-assembled AB/B blend of poly(ethylene glycol)-b-polystyrene/polystyrene by dispersion RAFT polymerization." Polymer Chemistry 8, no. 14 (2017): 2173–81. http://dx.doi.org/10.1039/c7py00339k.

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Yang, Po-Chih, Yueh-Han Chien, Shih-Hsuan Tseng, Chia-Chung Lin, and Kai-Yu Huang. "Synthesis and Self-Assembly of Multistimulus-Responsive Azobenzene-Containing Diblock Copolymer through RAFT Polymerization." Polymers 11, no. 12 (2019): 2028. http://dx.doi.org/10.3390/polym11122028.

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This paper gathered studies on multistimulus-responsive sensing and self-assembly behavior of a novel amphiphilic diblock copolymer through a two-step reverse addition-fragmentation transfer (RAFT) polymerization technique. N-Isopropylacrylamide (NIPAM) macromolecular chain transfer agent and diblock copolymer (poly(NIPAM-b-Azo)) were discovered to have moderate thermal decomposition temperatures of 351.8 and 370.8 °C, respectively, indicating that their thermal stability was enhanced because of the azobenzene segments incorporated into the block copolymer. The diblock copolymer was determined

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Zhang, Juan, Zhongkai Wang, Xuehui Wang, and Zhigang Wang. "The synthesis of bottlebrush cellulose-graft-diblock copolymer elastomers via atom transfer radical polymerization utilizing a halide exchange technique." Chemical Communications 55, no. 92 (2019): 13904–7. http://dx.doi.org/10.1039/c9cc06982h.

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A novel kind of bottlebrush cellulose-graft-diblock copolymer elastomer (Cell-g-PBA-b-PMMA) was made with cellulose as the backbone chain and poly(n-butyl acrylate)-block-poly(methyl methacrylate) (PBA-b-PMMA) as the diblock copolymer brushes.

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Derry, Matthew J., Lee A. Fielding, Nicholas J. Warren, et al. "In situ small-angle X-ray scattering studies of sterically-stabilized diblock copolymer nanoparticles formed during polymerization-induced self-assembly in non-polar media." Chemical Science 7, no. 8 (2016): 5078–90. http://dx.doi.org/10.1039/c6sc01243d.

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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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Dissertations / Theses on the topic "Diblock copolymer synthesis"

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Qureshi, M. S. "A study of styrene-ethylene oxide diblock copolymers." Thesis, University of Strathclyde, 1990. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.292269.

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Shakir, Sa'ed A. "Studies of stabilization of non-aqueous polymer dispersions with diblock copolymers." Thesis, Loughborough University, 1987. https://dspace.lboro.ac.uk/2134/19421.

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A diblock copolymer of Poly (Styrene-b- [ethylene-co-propylene]) has been used as a stabilizer in non-aqueous dispersion polymerizations of methyl methacrylate and vinyl acetate in n-heptane. The particles thus produced were stabilized by well defined surface layers of ethylene-propylene copolymer chains. The dependence of the particle size on the stabilizer, monomer and initiator concentrations was studied. Both seeded and one-shot polymerization techniques were investigated. Polymer particles were characterized by transmission electron microscopy to determine particle shape and size. The lon

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Akçora, Pınar. "Synthesis and characterization of diblock copolymer templated iron oxide nanoparticles." College Park, Md. : University of Maryland, 2005. http://hdl.handle.net/1903/2720.

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Thesis (Ph. D.) -- University of Maryland, College Park, 2005.<br>Thesis research directed by: Chemical Engineering. Title from t.p. of PDF. Includes bibliographical references. Published by UMI Dissertation Services, Ann Arbor, Mich. Also available in paper.

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Cunningham, Victoria. "Synthesis of diblock copolymer nanoparticles via polymerisation-induced self-assembly." Thesis, University of Sheffield, 2016. http://etheses.whiterose.ac.uk/14322/.

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Reversible addition-fragmentation chain transfer (RAFT) polymerisation has been used to synthesise a range of amphiphilic diblock copolymers. These diblock copolymers undergo polymerisation-induced self-assembly (PISA) to form spherical, worm-like or vesicular nano-objects, depending on the target diblock composition and the reaction conditions. These diblock copolymers are analysed by a variety of techniques including NMR, GPC, DLS and TEM.

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Feng, Lei. "Synthesis and Characterization of Ionically Bonded Diblock Copolymers." University of Akron / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=akron1385331107.

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Gautriaud, Emilie. "Synthesis of polyisobutylene-polyisoprene diblock copolymer based on natural rubber biosynthesis." University of Akron / OhioLINK, 2006. http://rave.ohiolink.edu/etdc/view?acc_num=akron1154963470.

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Chen, Alfred Yuen-Wei. "Synthesis and Functionalization of Poly(ethylene oxide-b-ethyloxazoline) Diblock Copolymers with Phosphonate Ions." Thesis, Virginia Tech, 2013. http://hdl.handle.net/10919/23930.

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Poly(ethylene oxide) (PEO) and poly(2-ethyl-2-oxazoline) (PEOX) are biocompatible polymers that act as hydrophilic "stealth" drug carriers. As block copolymers, the PEOX group offers a wider variety of functionalization. The goal of this project was to synthesize a poly(ethylene oxide)-b-poly(2-ethyl-2-oxazoline) (PEO-b-PEOX) block copolymer and functionalize pendent groups of PEOX with phosphonic acid. This was achieved through cationic ring opening polymerization (CROP) of 2-ethyl-2-oxazoline monomer onto PEO. These polymerizations used tosylsulfonyl chloride as initiator. Size-exclusion chr

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Montenegro-Galindo, Gladys Rocio. "Synthesis and Protein Adsorption Studies of Pegylated-Polyester Nanoparticles with Different Peg Architectures." University of Akron / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=akron1384629996.

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Gautriaud, Emilie. "Review of natural rubber biosynthesis and synthesis of model intermediates for the preparation of a macroinitiator for the in vitro synthesis of polyisobutylene-polyisoprene diblock copolymer." Akron, OH : University of Akron, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=akron1154963470.

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Thesis (M.S.)--University of Akron, Dept. of Polymer Science, 2006.<br>"December, 2006." Title from electronic thesis title page (viewed 12/31/2008) Advisor, Judit E. Puskas; Faculty Reader, Coleen Pugh; Department Chair, Mark D. Foster; Dean of the College, Frank N. Kelley; Dean of the Graduate School, George R. Newkome. Includes bibliographical references.

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Jarnagin, Nathan D. "High χ block copolymers for sub 20 nm pitch patterning: synthesis, solvent annealing, directed self assembly, and selective block removal". Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/50287.

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Block copolymer (BCP) thin film patterns, generated using directed self-assembly (DSA) of diblock copolymers, have shown excellent promise as templates for semiconductor device manufacturing since they have the potential to produce feature pitches and sizes well below 20 nm and 10 nm, respectively, using current 193 nm optical lithography. The goal of this work is to explore block copolymers with sufficient thermodynamics driving force (as described by the Flory Huggins interaction parameter, χ) for phase separation at these smallest lengths scales. Here, poly(styrene)-b-poly(hydroxystyrene

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Books on the topic "Diblock copolymer synthesis"

1

Bailey, Lindsey. synthesis and aqueous solution properties of new hydrophilic-hydrophilic diblock copolymers. 2001.

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Cao, Lan. Synthesis and solution self-assembly of polyferrocene diblock copolymers: A route to orgaometallic nanospheres and nanowires. 2002.

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Book chapters on the topic "Diblock copolymer synthesis"

1

Scherer, Maik Rudolf Johann. "Diblock Copolymer Synthesis." In Double-Gyroid-Structured Functional Materials. Springer International Publishing, 2013. http://dx.doi.org/10.1007/978-3-319-00354-2_3.

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Ko, Yoon Soo, and Yong Ku Kwon. "Synthesis and Nanophase-Separated Morphology of a Diblock Copolymer of Polypentafluorostyrene-b-Poly(methyl methacrylate) by Atom Transfer Radical Polymerization." In Solid State Phenomena. Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/3-908451-31-0.595.

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Kloninger, Christian, and Matthias Rehahn. "Carbanion-Pump Mediated Synthesis and Bulk Morphologies of Ferrocenyldimethylsilane-Methyl Methacrylate Diblock Copolymers." In ACS Symposium Series. American Chemical Society, 2006. http://dx.doi.org/10.1021/bk-2006-0928.ch021.

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Stelzer, F., W. Fischer, G. Leising, and Ch Heller. "Well Defined Polyacetylene-block-Poly(1,3-cyclopentylene Vinylene) Diblock Copolymers, Synthesis and Characterization." In Electronic Properties of Polymers. Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/978-3-642-84705-9_43.

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Wang, Xiao-Song, Mitchell A. Winnik, and Ian Manners. "Synthesis and Solution Self-Assembly of Polyferrocene-Based AB Diblock and ABC Triblock Copolymers." In Macromolecules Containing Metal and Metal-Like Elements. John Wiley & Sons, Inc., 2003. http://dx.doi.org/10.1002/0471466573.ch4.

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Cao, Lan, Mitchell A. Winnik, and Ian Manners. "Synthesis and Self-Assembly of Polyisoprene-Block -Polyferrocenyldimethylsilane Diblock Copolymers: Fabrication of Ceramic Nanolines on Semiconducting Substrates." In Macromolecules Containing Metal and Metal-Like Elements. John Wiley & Sons, Inc., 2003. http://dx.doi.org/10.1002/0471466573.ch5.

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Han, Chang Dae. "Rheology of Block Copolymers." In Rheology and Processing of Polymeric Materials: Volume 1: Polymer Rheology. Oxford University Press, 2007. http://dx.doi.org/10.1093/oso/9780195187823.003.0014.

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Block copolymer consists of two or more long blocks with dissimilar chemical structures which are chemically connected. There are different architectures of block copolymers, namely, AB-type diblock, ABA-type triblock, ABC-type triblock, and AmBn radial or star-shaped block copolymers, as shown schematically in Figure 8.1. The majority of block copolymers has long been synthesized by sequential anionic polymerization, which gives rise to narrow molecular weight distribution, although other synthesis methods (e.g., cationic polymerization, atom transfer radical polymerization) have also been developed in the more recent past. Owing to immiscibility between the constituent blocks, block copolymers above a certain threshold molecular weight form microdomains (10–50 nm in size), the structure of which depends primarily on block composition (or block length ratio). The presence of microdomains confers unique mechanical properties to block copolymers. There are many papers that have dealt with the synthesis and physical/mechanical properties of block copolymers, too many to cite them all here. There are monographs describing the synthesis and physical properties of block copolymers (Aggarwal 1970; Burke and Weiss 1973; Hamley 1998; Holden et al. 1996; Hsieh and Quirk 1996; Noshay and McGrath 1977). Figure 8.2 shows schematically four types of equilibrium microdomain structures observed in block copolymers. Referring to Figure 8.2, it is well established (Helfand and Wasserman 1982; Leibler 1980) that in microphase-separated block copolymers, spherical microdomains are observed when the volume fraction f of one of the blocks is less than approximately 0.15, hexagonally packed cylindrical microdomains are observed when the value of f is between approximately 0.15 and 0.44, and lamellar microdomains are observed when the value of f is between approximately 0.44 and 0.50. Some investigators have observed ordered bicontinuous double-diamonds (OBDD) (Thomas et al. 1986; Hasegawa et al. 1987) or bicontinuous gyroids (Hajduk et al. 1994) at a very narrow range of f (say, between approximately 0.35 and 0.40) for certain block copolymers. Figure 8.2 shows only one half of the symmetricity about f = 0.5. Transmission electron microscopy (TEM), small-angle X-ray scattering (SAXS), and small-angle neutron scattering (SANS) have long been used to investigate the types of microdomain structures in block copolymers.

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(Mike) Chung, T. C. "Synthesis of Functional Polyolefin Diblock Copolymers." In Functionalization of Polyolefins. Elsevier, 2002. http://dx.doi.org/10.1016/b978-012174651-3/50011-2.

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Ameduri, Bruno, and Bernard Boutevin. "Synthesis, properties and applications of fluorinated diblock, triblock and multiblock copolymers." In Well-Architectured Fluoropolymers: Synthesis, Properties and Applications. Elsevier, 2004. http://dx.doi.org/10.1016/b978-008044388-1/50013-3.

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Chan, Yi-Tsu, Hong-Ping Lin, Chung-Yuan Mou, and Shiuh-Tzung Liu. "Synthesis of mesoporous silicas with different pore-size by using EOmMAn diblock copolymers of tunable block length as the templates." In Nanotechnology in Mesostructured Materials, Proceedings of the 3rd International Materials Symposium. Elsevier, 2003. http://dx.doi.org/10.1016/s0167-2991(03)80340-3.

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Conference papers on the topic "Diblock copolymer synthesis"

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Karnik, Rohit, Frank X. Gu, Suman Bose, et al. "Microfluidic Synthesis of Polymeric Nanoparticles." In ASME 2008 6th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2008. http://dx.doi.org/10.1115/icnmm2008-62218.

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A central challenge in the development of drug-encapsulated polymeric nanoparticles is the inability to control the nanoparticle physicochemical properties that affect their biodistribution, drug release, and efficacy. Nanoparticles may be developed by mixing and nanoprecipitation of polymers and drugs dissolved in organic solvents with non-solvents. Inadequate control over this mixing process is a source of variability in the synthesis of these nanoparticles by nanoprecipitation. We demonstrate that rapid and tunable mixing through hydrodynamic flow focusing in a microfluidic device can be us

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Sauvé, Geneviève, Rui Zhang, Shijun Jia, Tomasz Kowalewski, and Richard D. McCullough. "Synthesis, mobility, and conductivity of well-defined regioregular poly(3-hexylthiophene) and diblock copolymers of regioregular poly(3-hexylthiophene)." In SPIE Optics + Photonics, edited by Zhenan Bao and David J. Gundlach. SPIE, 2006. http://dx.doi.org/10.1117/12.681068.

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Reports on the topic "Diblock copolymer synthesis"

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Veith, C. A., and R. E. Cohen. Synthesis of Poly(dimethylsiloxane) - Nylon 6 Diblock Copolymers. Defense Technical Information Center, 1989. http://dx.doi.org/10.21236/ada216850.

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