副教授 博士生导师 硕士生导师
性别: 男
毕业院校: 大连理工大学
学位: 博士
所在单位: 化工学院
学科: 高分子材料. 高分子化学与物理. 功能材料化学与化工
办公地点: 西部校区化工实验楼A303
联系方式: 办公室电话:84986101,13610963135
电子邮箱: zhangchq@dlut.edu.cn
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论文类型: 期刊论文
发表时间: 2010-07-01
发表刊物: POLYMER BULLETIN
收录刊物: SCIE、EI
卷号: 65
期号: 3
页面范围: 201-213
ISSN号: 0170-0839
关键字: Symmetrical triblock copolymers; High-trans-1,4-Polybutadiene; Cold crystallization; Styrene; Isoprene
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, (1)H NMR, and (13)C 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.