两亲性嵌段共聚物聚己内酯-聚二甲基硅氧烷-聚己内酯增韧氰酸树脂性能研究

玻璃钢/复合材料 ›› 2018, Vol. 0 ›› Issue (11): 99-103.

两亲性嵌段共聚物聚己内酯-聚二甲基硅氧烷-聚己内酯增韧氰酸树脂性能研究

刘琦, 周权^*, 宋宁, 倪礼忠

华东理工大学特种功能高分子材料及相关技术教育部重点实验室,上海200237

收稿日期:2018-07-31 出版日期:2018-11-28 发布日期:2018-11-28
通讯作者: 周权(1973-),男,副教授,主要从事高性能基体树脂方面的研究,qzhou@ecust.edu.cn。
作者简介:刘琦(1995-),女,硕士,主要从事两亲性嵌段聚合物基树脂方面的研究。

THE PROPERTIES OF AMPHIPHILIC BLOCK COPOLYMER POLYCAPROLACTONE- POLYDIMETHYLSILOXANE-POLYCAPROLACTONE TOUGHENED CYANATE RESIN

LIU Qi, ZHOU Quan^*, SONG Ning, NI Li-zhong

Key Laboratory for Specially Functional Polymers and Related Technology of Ministry of Educational of East China University of Science and Technology, Shanghai 200237,China

Received:2018-07-31 Online:2018-11-28 Published:2018-11-28

摘要/Abstract

摘要： 采用开环聚合合成聚己内酯-b-聚二甲基硅氧烷-b-聚己内酯(PCL-b-PDMS-b-PCL)两亲性三嵌段聚合物混合进氰酸酯树脂预聚体中,得到了具有纳米复合结构的氰酸酯树脂/嵌段改性混合物。氰酸酯树脂/嵌段体系的SAXS与TEM结果表明,CE/PCL-b-PDMS-b-PCL体系自组装形成50 nm~60 nm的纳米复合结构。随着嵌段含量增加,多相形态由颗粒改变至蠕虫状结构,粒子间距增大。非等温DSC固化与K_IC数据结果表示,氰酸酯树脂/嵌段体系固化放热峰的温度逐渐降低,反应活性提高,并且其断裂韧性有所提高。

关键词: 嵌段共聚物, 氰酸树脂, 自组装

Abstract: By the ring-opening polymerization of caprolactone, PCL-b-PDMS-b-PCL triblock amphiphilic polymer was obtained and added into the cyanate ester thermosetting resin, producing a mixture of self-assembled nanostructures. In the ester resin prepolymer, a cyanate resin/block modification mixture having a nanocomposite structure is obtained. The results of cyanate resin/block system SAXS and TEM confirm that the 50 nm~60 nm nanostructures were achieved by CE/PCL-b-PDMS-b-PCL system. The system also has a diverse morphology from particles to worm-like structures as the block polymer content increases. Meanwhile, the average distance between neighboring microdomains increases. The mechanism of the the CE/PCL-PDMS-PCL is self-assembling. By non-isothermal DSC curing and critical stress intensity factor (K_IC) value, the block-modified resin is 25 ℃~50 ℃ ahead of the exothermic peak of the unmodified CE resin, indicating that the reactivity of blends system is improved. The K_IC of the 20 wt% block content of CE/PCL-b-PDMS-b-PCL was 0.65, which was 97% higher than that of the unmodified CE system, demonstrating that the fracture toughness of the block-modified resin is improved.

Key words: block copolymer, cyanate resin, self-assembly

中图分类号:

TB332

刘琦, 周权, 宋宁, 倪礼忠. 两亲性嵌段共聚物聚己内酯-聚二甲基硅氧烷-聚己内酯增韧氰酸树脂性能研究[J]. 玻璃钢/复合材料, 2018, 0(11): 99-103.

LIU Qi, ZHOU Quan, SONG Ning, NI Li-zhong. THE PROPERTIES OF AMPHIPHILIC BLOCK COPOLYMER POLYCAPROLACTONE- POLYDIMETHYLSILOXANE-POLYCAPROLACTONE TOUGHENED CYANATE RESIN[J]. Fiber Reinforced Plastics/Composites, 2018, 0(11): 99-103.

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