反应性丙烯酸酯三嵌段共聚物与纳米SiO2协同增韧环氧树脂
Synergistically toughening epoxy resins with reactive acrylate-based block copolymers and nano-SiO2
向艳丽 1葛攀峰 1任强 1汪称意 1李坚1
作者信息
- 1. 常州大学 材料科学与工程学院,常州 213164
- 折叠
摘要
利用引发剂可连续再生催化剂原子转移自由基聚合(ICAR-ATRP)合成了两种反应性丙烯酸酯三嵌段共聚物:聚(甲基丙烯酸甲酯-co-甲基丙烯酸缩水甘油酯)-b-聚丙烯酸丁酯-b-聚(甲基丙烯酸甲酯-co-甲基丙烯酸缩水甘油酯)(PMGBMG)和聚甲基丙烯酸甲酯-b-聚(丙烯酸丁酯-co-甲基丙烯酸缩水甘油酯)-b-聚甲基丙烯酸甲酯(PMBGM).并将硅烷偶联剂KH-550改性的纳米SiO2 接枝于嵌段共聚物,用于对环氧树脂E-51进行增韧.研究结果表明:仅加入 5%PMGBMG-SiO2,相对纯E-51体系其断裂韧性参数临界应力强度因子(KIC)提高了 145%,拉伸强度和模量分别提高了 8%和 31%,明显优于不接枝的嵌段共聚物和PMBGM-SiO2,实现了韧性和刚性的同时提高,并且材料的耐热性保持较好.
Abstract
Two reactive acrylate triblock copolymers including poly(methyl methacrylate-co-glycidyl methacrylate)-b-poly(butyl acrylate)-b-poly(methyl methacrylate-co-glycidyl methacrylate)(PMGBMG)and poly(methyl methac-rylate)-b-poly(butyl acrylate-co-glycidyl methacrylate)-b-poly(methyl methacrylate)(PMBGM)were synthesized via initiator for continuous activator regeneration atom transfer radical polymerization(ICAR-ATRP).Nano-SiO2 modified by 3-ainopropyltriethoxysilane(KH-550)was grafted on block copolymer to prepare PMGBMG-SiO2 and PMBGM-SiO2 as tougheners for epoxy resin.Results show that addition of 5%PMGBMG-SiO2 in E-51 epoxy resin can increase the critical stress intensity factor(KIC)by 145%compared with pure epoxy matrix.Meanwhile,the tensile strength and modulus are increased by 8%and 31%respectively,which are superior to the resins modified by pure copolymer and PMBGM-SiO2.The toughness and rigidity are improved simultaneously,while heat resist-ance is also well maintained.
关键词
ICAR-ATRP/嵌段共聚物/纳米SiO2/协同增韧/环氧树脂/力学性能Key words
ICAR-ATRP/block copolymer/nano-SiO2/synergistic toughening/epoxy resin/mechanical proper-ties引用本文复制引用
基金项目
国家自然科学基金(51873025)
江苏高校品牌专业建设工程资助项目()
江苏高校优势学科建设工程资助项目(51873025)
出版年
2024
NETL
NSTL
万方数据