Preparation of amphiphilic graft copolymer with polyisoprene backbone by combination of anionic polymerization and ＂click＂ reaction

A novel graft copolymer consisting of polyisoprene backbone and hydrophilic side chain with carbamic acid ester functional group was prepared via thiol-ene＂click＂reaction and alcohol-isocyanate reactions.Polyisoprene was synthesized by anionic polymerization using n-butyl lithium as initiator,and th...

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Bibliographic Details
Published in:Chinese chemical letters 2012-03, Vol.23 (3), p.347-350
Main Authors: Shao, Fei, Ni, Xu Feng, Shen, Zhi Quan
Format: Article
Language:English
Subjects:
Click reaction
Graft-copolymer
Isocyanate
Thiol-ene addition
两亲接枝共聚物
偶氮二异丁腈
制备
异氰酸酯
氨基甲酸酯类
烯反应
聚异戊二烯
阴离子聚合
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Summary:A novel graft copolymer consisting of polyisoprene backbone and hydrophilic side chain with carbamic acid ester functional group was prepared via thiol-ene＂click＂reaction and alcohol-isocyanate reactions.Polyisoprene was synthesized by anionic polymerization using n-butyl lithium as initiator,and the pendant hydroxyl groups were introduced by the thiol-ene reaction of mercaptoethanol with the double bond of 1,2-addition units of PI backbone in the presence of radical initiator azobisisobutyronitrile. Isocyanate end group capped poly（ethylene glycol）（mPEG-NCO） was grafted onto the PI backbone through alcoholisocyanate reaction between the pendant hydroxyl groups and isocyanate group of mPEG-NCO.The structure of the graft copolymer were characterized and confirmed by means of size-exclusion chromatography,~1H NMR and FTIR spectroscopy.
ISSN:1001-8417
1878-5964
DOI:10.1016/j.cclet.2011.12.003