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Controlled Bimodal Molecular‐Weight‐Distribution Polymers: Facile Synthesis by RAFT Polymerization
Author(s) -
Qin Jian,
Zhang Lifen,
Jiang Hongjuan,
Zhu Jian,
Zhang Zhengbiao,
Zhang Wei,
Zhou Nianchen,
Cheng Zhenping,
Zhu Xiulin
Publication year - 2012
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201103914
Subject(s) - raft , reversible addition−fragmentation chain transfer polymerization , molar mass distribution , chain transfer , polymerization , living polymerization , polymer , polymer chemistry , living free radical polymerization , radical polymerization , copolymer , chemistry , materials science , organic chemistry
The RAFT agents RAFT‐1 and RAFT‐2 were used for RAFT polymerization to synthesize well‐defined bimodal molecular‐weight‐distribution (MWD) polymers. The system showed excellent controllability and “living” characteristics toward both the higher‐ and lower‐molecular‐weight fractions. It is important that bimodal higher‐molecular‐weight (HMW) polymers and block copolymers with both well‐controlled molecular weight (MW) and MWD could be prepared easily due to the “living” features of RAFT polymerization. The strategy realized a mixture of higher/lower‐molecular‐weight polymers at the molecular level but also preserved the features of living radical polymerization (LRP) of the RAFT polymerization.