双锂引发剂一步法合成S/B嵌段共聚物的研究

杨华; 金关泰*; 逄杰斌; 张兴英; 杨万泰;

北京化工大学学报(自然科学版) ›› 2000, Vol. 27 ›› Issue (2) : 18-21.

PDF(141 KB)
欢迎访问北京化工大学学报(自然科学版),今天是 2025年7月26日 星期六
Email Alert  RSS
PDF(141 KB)
北京化工大学学报(自然科学版) ›› 2000, Vol. 27 ›› Issue (2) : 18-21.
研究论文

双锂引发剂一步法合成S/B嵌段共聚物的研究

  • 杨华; 金关泰*; 逄杰斌; 张兴英; 杨万泰;
作者信息 +

Study on synthesis of S/B block copolymer by one-step addition process with dilithium initiator

  • YANG Hua ;JIN Guan-tai; PANG Jie-bin ;ZHANG Xing-ying ;YANG Wan-tai
Author information +
文章历史 +

摘要

根据苯乙烯与丁二烯共聚时竞聚率的差异,以环己烷为溶剂,四氢呋喃为极性添加剂,用双锂活性短链引发剂一步合成了窄分布的具有无规段的S/B嵌段共聚物,采用核磁共振、红外光谱、差示扫描量热法对此聚合物进行了表征,结果表明其结构为嵌段与无规并存。透射式电镜能明显地观察到聚合物的微观相分离结构。性能测试表明该聚合物具备较好的力学性能,可视为一种热塑性弹性体,但较多无规过渡段的存在造成其永久变形较大。热熔压敏胶的测试表明,其性能符合指标要求。

Abstract

According to the difference between reactivity ratio of styrene and butadiene (anionic polymeri-zation), a kind of S/B block copolymer with molecular weight distribution about 1 13 was synthesized by one step addition process with dilithium as initiator, cyclohexane as solvent and tetrahydrofuran as polar additive. S/B block copolymer was characterized by GPC, 1H-NMR, IR, DSC. The results showed that the block and tapered structure coexisted in the product. Obvious two phase separation structure The result s showed that the block and taperedst ructure coexisted in the product . Obvious two phase separation st ructure was observed through TEM. The mechanical properties of this product showed that it had characteristics of thermoplastic elastomer , but it spermanent set was relatively high due to the existence of the tapered st ructure. The result s of hot melt pressure sensitive adhesive with this S/ B block copolymer as main component showed that the rolling ball tack , the holding
power and the peel st rength are satisfactory with the requirement .

引用本文

导出引用
杨华; 金关泰*; 逄杰斌; 张兴英; 杨万泰;. 双锂引发剂一步法合成S/B嵌段共聚物的研究[J]. 北京化工大学学报(自然科学版), 2000, 27(2): 18-21
YANG Hua ;JIN Guan-tai; PANG Jie-bin ;ZHANG Xing-ying ;YANG Wan-tai . Study on synthesis of S/B block copolymer by one-step addition process with dilithium initiator [J]. Journal of Beijing University of Chemical Technology, 2000, 27(2): 18-21

参考文献

[1] 杨华,金关泰,颜鸿斌,等. 双锂活性短链引发剂两步法合成SBS 的研究. 北京化工大学学报,1999 ,26 (1) :24~26
[2] 杨万泰,金关泰. 一种锂系引发剂的制备. 中国专利,ZL 110152X. 1992209204
[3] 金关泰. 高分子化学的理论和应用进展. 北京:中国石化出版社,1995. 482
PDF(141 KB)

5786

Accesses

0

Citation

Detail

段落导航
相关文章

/