Synthesis of CO2-Based Block Copolymers via Chain Transfer Polymerization Using Macroinitiators: Activity, Blocking Efficiency, and Nanostructure

Zhang, Yao -Yao; Yang, Guan -Wen; Wang, Yanyan; Lu, Xin-Yu; Wu, Guang -Peng; Zhang, Ze-Sheng; Wang, Kai; Zhang, Ruo -Yu; Nealey, Paul F.; Darensbourg, Donald J.; Xu, Zhi -Kang

doi:10.1021/acs.macromol.7b02231

Title: Synthesis of CO₂-Based Block Copolymers via Chain Transfer Polymerization Using Macroinitiators: Activity, Blocking Efficiency, and Nanostructure

Journal Article · Thu Feb 01 00:00:00 EST 2018 · Macromolecules

DOI:https://doi.org/10.1021/acs.macromol.7b02231· OSTI ID:1461348

Zhang, Yao -Yao ^[1]; Yang, Guan -Wen ^[1]; Wang, Yanyan ^[2]; Lu, Xin-Yu ^[1];

^[1]; Zhang, Ze-Sheng ^[1]; Wang, Kai ^[3]; Zhang, Ruo -Yu ^[1];

^[4];

^[2];

^[1]

Zhejiang Univ., Hangzhou (China)
Texas A & M Univ., College Station, TX (United States)
Zhejiang Univ., Hangzhou (China); Univ. of Chicago, Chicago, IL (United States)
Univ. of Chicago, Chicago, IL (United States); Argonne National Lab. (ANL), Argonne, IL (United States)

Immortal copolymerization of epoxides/CO₂ using macro-chain-transfer agent (macro-CTA) is a useful method to prepare CO₂-based block copolymers for manufacturing high value-added materials. Despite a variety of CO₂-based block copolymers that have been reported using distinct macro-CTAs, issues including catalytic activity and blocking efficiency for the immortal polymerization remain superficially understood. Here, we systematically studied the reaction activity and blocking efficiency by using various macro-CTAs (including PPG, PEG, and PS) in the presence of two classical catalyst systems ((BDI)ZnOAc and SalenCoTFA/PPN-TFA). By analysis of the gel permeation chromatograms via mathematical deconvolution, it comes to a conclusion that the size, nature, and ratio of [macro-CTA]/[Cat.] strongly influence the catalytic activity of the reaction and blocking efficiency for the resultant block copolymers. As a result, thin film self-assembly of PS/PPC block copolymers was investigated, and the results were analyzed by SEM to ascertain the impact of blocking efficiency on nanoassembly.

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Research Organization:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Organization:: National Natural Science Foundation of China (NSFC); Welch Foundation; Zhejiang University; National Science Foundation (NSF); USDOE

Grant/Contract Number:: AC02-06CH11357

OSTI ID:: 1461348

Journal Information:: Macromolecules, Vol. 51, Issue 3; ISSN 0024-9297

Publisher:: American Chemical SocietyCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 25 works

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Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
CO2
block copolymer
chain transfer agent
immortal polymerization
polycarbonate

Title: Synthesis of CO2-Based Block Copolymers via Chain Transfer Polymerization Using Macroinitiators: Activity, Blocking Efficiency, and Nanostructure

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Title: Synthesis of CO₂-Based Block Copolymers via Chain Transfer Polymerization Using Macroinitiators: Activity, Blocking Efficiency, and Nanostructure