反应性丙烯酸酯三嵌段共聚物与纳米SiO_(2)协同增韧环氧树脂  

Synergistically toughening epoxy resins with reactive acrylate-based block copolymers and nano-SiO_(2)

作　　者：向艳丽 葛攀峰 任强 汪称意 李坚 XIANG Yanli;GE Panfeng;REN Qiang;WANG Chenyi;LI Jian(School of Materials Science and Engineering,Changzhou University,Changzhou 213164,China)

机构地区：[1]常州大学材料科学与工程学院,常州213164

出　　处：《复合材料学报》2024年第4期1830-1839,共10页Acta Materiae Compositae Sinica

基　　金：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。

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SiO_(2)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-SiO_(2),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-SiO_(2),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。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 methacrylate)-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-SiO_(2)modified by 3-ainopropyltriethoxysilane(KH-550)was grafted on block copolymer to prepare PMGBMG-SiO_(2)and PMBGM-SiO_(2)as tougheners for epoxy resin.Results show that addition of 5%PMGBMG-SiO_(2)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-SiO_(2).The toughness and rigidity are improved simultaneously,while heat resistance is also well maintained.

关 键 词：ICAR-ATRP 嵌段共聚物 纳米SiO_(2) 协同增韧 环氧树脂 力学性能 

分 类 号：TB332[一般工业技术—材料科学与工程]