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| 分次滴加DVB合成星形异戊二烯-苯乙烯嵌段共聚物 | |
| 引用本文： | 张雪涛,张东恒,魏观为,李韶辉,于军. 分次滴加DVB合成星形异戊二烯-苯乙烯嵌段共聚物[J]. 润滑油, 2013, 28(1): 23-28 |
| 作者姓名： | 张雪涛 张东恒 魏观为 李韶辉 于军 |
| 作者单位： | 中国石油大连润滑油研究开发中心,辽宁大连,116032 |
| 摘 要： | 采用阴离子聚合法，以正丁基锂为引发剂，合成了线形异戊二烯－苯乙烯嵌段活性链，以二乙烯基苯为偶联剂，分别采用一次性加入法和分次滴加法合成了星形异戊二烯－苯乙烯嵌段共聚物。研究发现，分次滴加法可以很好地解决单臂分子量较大时偶联效率低的难题，得到偶联效率高达95％的星形异戊二烯－苯乙烯嵌段共聚物。考察了聚合物的微观结构与热性能，发现聚合物具有典型的两相分离结构。 |
| 关 键 词： | 阴离子聚合 星形聚合物 嵌段共聚物 异戊二烯－苯乙烯聚合物 |
The Synthesis of Star-Shaped Isoprene-Styrene Block Copolymer by the Incremental Addition of Divinylbenzene |
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| ZHANG Xue-tao , ZHANG Dong-heng , WEI Guan-wei , LI Shao-hui , YU Jun. The Synthesis of Star-Shaped Isoprene-Styrene Block Copolymer by the Incremental Addition of Divinylbenzene[J]. Lubricating Oil, 2013, 28(1): 23-28 | |
| Authors: | ZHANG Xue-tao ZHANG Dong-heng WEI Guan-wei LI Shao-hui YU Jun |
| Affiliation: | (PetroChina Dalian Lubricating Oil R&D Institute,Dalian 116032,China) |
| Abstract: | Living isoprene- styrene block chains were synthesized by n -butyllithium via anionic polymerization. Star- shaped isoprene - styrene block copolymers were achieved from the living chains with a one - shot procedure or an incremental procedure in which equally divided portions of divinylbenzene （DVB） were added periodically. It indicated that the problem which was difficult to obtain high coupling efficiency when the arm molecular weight was large was well solved by the incremental procedure. Star- shaped isoprene -styrene block copolymer with the coupling efficiency of 95% was obtained. The microstructure and thermo performance were investigated and the polymer showed a micro phase separation. |
| Keywords: | anionic polymerization star- shaped polymer block copolymer isoprene- styrene copolymer |
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