Synthesis and characterization of symmetrical triblock copolymers containing crystallizable high-trans-1,4-polybutadiene

被引：0
|
作者：
Xuetao Zhang
Chunqing Zhang
Yurong Wang
Yang Li
机构：
[1] Dalian University of Technology,State Key Laboratory of Fine Chemicals, Department of Polymer Science and Engineering
来源：
Polymer Bulletin | 2010年 / 65卷
关键词：
Symmetrical triblock copolymers; High-trans-1,4-Polybutadiene; Cold crystallization; Styrene; Isoprene;
D O I：
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学科分类号：
摘要：
A series of symmetrical triblock copolymers containing crystallizable high-trans-1,4-polybutadiene (HTPB) were synthesized by sequential anionic polymerization of 1,3-butadiene (Bd) with isoprene (Ip) (or styrene (St)) using barium salt of di(ethylene glycol) ethyl ether/triisobutylaluminium/dilithium (BaDEGEE/TIBA/DLi) as initiation system. The microstructures of the symmetrical triblock copolymers were determined by IR, 1H NMR, and 13C NMR. The results indicated that polyisoprene-block-high-trans-1,4-polybutadiene-block-polyisoprene (IBI) contained HTPB segments and medium 3,4-polyisoprene (PI) segments, and polystyrene-block-HTPB-block-polystrene (SBS) contained HTPB and atatic-polystyrene (PS) segments. The DSC analysis revealed that SBS tended to phase separate but IBI did not. The cold crystallization was observed in IBI but not in SBS.
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页码：201 / 213
页数：12
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