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Synthesis and characterization of polystyrene/poly(4-vinylpyridine) triblock copolymers by reversible addition-fragmentation chain transfer polymerization and their self-assembled aggregates in water
Yuan, JJ; Ma, R; Gao, Q; Wang, YF; Cheng, SY; Feng, LX; Fan, ZQ; Jiang, L
2003-07-25
Source PublicationJOURNAL OF APPLIED POLYMER SCIENCE
ISSN0021-8995
Volume89Issue:4Pages:1017-1025
AbstractReversible addition-fragmentation chain transfer polymerization (RAFT) was developed for the controlled preparation of polystyrene (PS)/poly(4-vinylpyridine) (P4VP) triblock copolymers. First, PS and P4VP homopolymers were prepared using dibenzyl trithiocarbonate as the chain transfer agent (CTA). Then, PS-b-P4VP-b-PS and P4VP-b-PS-b-P4VP triblock copolymers were synthesized using as macro-CTA the obtained homopolymers PS and P4VP, respectively. The synthesized polymers had relatively narrower molecular weight distributions (M-w/M-n < 1.25), and the polymerization was controlled/living. Furthermore, the polymerization rate appeared to be lower when styrene was polymerized using P4VP as the macro-CTA, compared with polymerizing 4-vinylpyridine using PS as the macro-CTA. This was attributed to the different transfer constants of the P4VP and PS macro-CTAs to the styrene and the 4-vinylpyridine, respectively. The aggregates of the triblock copolymers with different compositions and chain architectures in water also were investigated, and the results are presented. Reducing the P4VP block length and keeping the PS block constant favored the formation of rod aggregates. Moreover, the chain architecture in which the P4VP block was in the middle of the copolymer chain was rather favorable to the rod assembly because of the entropic penalty associated with the looping of the middle-block P4VP to form the aggregate corona and tailing of the end-block PS into the core of the aggregates. (C) 2003 Wiley Periodicals, Inc.
KeywordBlock Copolymers Radical Polymerization Poly(4-vinylpyridine) Aggregates
DOI10.1002/app.12222
Indexed BySCI
Language英语
WOS IDWOS:000182924600018
PublisherJOHN WILEY & SONS INC
Citation statistics
Cited Times:56[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/80656
Collection中国科学院化学研究所
Corresponding AuthorCheng, SY
Affiliation1.Hubei Univ, Coll Chem & Mat Sci, Wuhan 430062, Peoples R China
2.Zhejiang Univ, Inst Polymer Sci, Hangzhou 310027, Peoples R China
3.Chinese Acad Sci, Inst Chem, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Yuan, JJ,Ma, R,Gao, Q,et al. Synthesis and characterization of polystyrene/poly(4-vinylpyridine) triblock copolymers by reversible addition-fragmentation chain transfer polymerization and their self-assembled aggregates in water[J]. JOURNAL OF APPLIED POLYMER SCIENCE,2003,89(4):1017-1025.
APA Yuan, JJ.,Ma, R.,Gao, Q.,Wang, YF.,Cheng, SY.,...&Jiang, L.(2003).Synthesis and characterization of polystyrene/poly(4-vinylpyridine) triblock copolymers by reversible addition-fragmentation chain transfer polymerization and their self-assembled aggregates in water.JOURNAL OF APPLIED POLYMER SCIENCE,89(4),1017-1025.
MLA Yuan, JJ,et al."Synthesis and characterization of polystyrene/poly(4-vinylpyridine) triblock copolymers by reversible addition-fragmentation chain transfer polymerization and their self-assembled aggregates in water".JOURNAL OF APPLIED POLYMER SCIENCE 89.4(2003):1017-1025.
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