scholarly journals Model Amphiphilic Block Copolymers with Tailored Molecular Weight and Composition in PDMS-Based Films to Limit Soft Biofouling

2017 ◽  
Vol 9 (19) ◽  
pp. 16505-16516 ◽  
Author(s):  
Brandon M. Wenning ◽  
Elisa Martinelli ◽  
Sophie Mieszkin ◽  
John A. Finlay ◽  
Daniel Fischer ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Block Copolymers ◽  
Amphiphilic Block Copolymers

Amphiphilic Block Copolymers as Stabilizers in Emulsion Polymerization: Effects of the Anchoring Block Molecular Weight Dispersity on Stabilization Performance

2016 ◽  
Vol 50 (1) ◽  
pp. 315-323 ◽  
Author(s):  
Sean R. George ◽  
Rachel Champagne-Hartley ◽  
Gary A. Deeter ◽  
J. D. Campbell ◽  
Bernd Reck ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Block Copolymers ◽  
Emulsion Polymerization ◽  
Amphiphilic Block Copolymers

Amphiphilic Block Copolymers as Stabilizers in Emulsion Polymerization: Effects of the Stabilizing Block Molecular Weight Dispersity on Stabilization Performance

2015 ◽  
Vol 48 (24) ◽  
pp. 8913-8920 ◽  
Author(s):  
Sean George ◽  
Rachel Champagne-Hartley ◽  
Gary Deeter ◽  
Dave Campbell ◽  
Bernd Reck ◽  
...  
Keyword(s):  
Molecular Weight ◽  
Block Copolymers ◽  
Emulsion Polymerization ◽  
Amphiphilic Block Copolymers

Poly(Ethylene Oxide)-B-Poly(ε-Caprolactone) Amphiphilic Block Copolymers: Synthesis and Self-Assembly

2011 ◽  
Vol 284-286 ◽  
pp. 1877-1885
Author(s):  
Ke Xin Kang ◽  
Min Ying Liu ◽  
Qing Xiang Zhao ◽  
Peng Fu ◽  
Xiao Bing Wang
Keyword(s):  
Molecular Weight ◽  
Block Copolymers ◽  
Self Assembly ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Amphiphilic Block Copolymers ◽  
H Nmr ◽  
Transmission Electron ◽  
Particle Size Analyzer ◽  
Anionic Ring

A series of amphiphilic block copolymers mPEO-b-PCL with different PCL molecular weight were successfully prepared by combination of anionic ring-opening polymerization with coordination-insertion ring-opening polymerization. Firstly, the linear mPEO was prepared by anionic ring-opening copolymerization of EO with 2-(2-methoxyethoxy) ethoxide potassium as the small molecule initiators, then the mPEO as the macroinitiator was used to initiate the ring-opening polymerization of CL, in the absence of Sn(Oct)2 as the catalyst, and amphiphilic block copolymers mPEO-b-PCL were obtained. By changing the ratio of monomer and macroinitiator, prepared a series of different molecular weight mPEO-b-PCL. The structure of intermediates and final products were characterized by 1H NMR and GPC. The critical micelle concentration (cmc) of the final copolymer was measured. In addition, the sizes and morphologies of the obtained micelles at different PCL chains were studied with Laser nano-particle size analyzer and transmission electron microscopy (TEM).

Synthesis of CdS Nanoparticle/Amphiphilic Block Copolymer Composite Films and its Characteristics of Microstructures and Optoelectronic Properties

2009 ◽  
Vol 79-82 ◽  
pp. 887-890
Author(s):  
Yang Yen Yu ◽  
Wen Chen Chien ◽  
Yu Heng Chou
Keyword(s):  
Molecular Weight ◽  
Particle Size ◽  
Block Copolymers ◽  
Composite Films ◽  
Amphiphilic Block Copolymers ◽  
Hybrid Films ◽  
Chemical Structures ◽  
Cds Nanoparticle ◽  
Spherical Micelles ◽  
Prepared Composite

In this study, block copolymers of PS-b-PMSMA with various molecular weight were synthesized by atom transfer radical polymerization (ATRP). GPC analysis showed that the molecular weight distribution of the prepared PS-b-PMSMA could be controlled to be lower than 1.3 for the case of molecular weight less than 30,000. The chemical structures of the amphiphilic block copolymers of PS-b-PMSMA were well identified by FTIR. SEM showed that the spherical micelles and compound micelles were produced in hybrid films. The EDX analysis indicated that the nano-sized CdS particles have been successfully prepared in the PS-b-PMSMA composite films. The diameter of CdS particles calculated from Brus formula was about 4-5 nm. PL analysis revealed that the λmax of emission of the prepared composite materials had a red-shift as the CdS particle size increased.

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