AIM 核壳增韧剂/ PVC 树脂共混体系性能

吴广峰; 赵俊枫; 杨海东; 冯之榴; 张会轩

AIM 核壳增韧剂/ PVC 树脂共混体系性能

1.
东北大学理学院, 沈阳 110004;
2.
长春工业大学化学工程学院, 长春 130012;
3.
中国科学院长春应用化学研究所, 长春 130022

基金项目: 国家自然科学基金(50273039); 长春工业大学科学研究基金资助(20040001)

详细信息

通讯作者:
吴广峰,博士生,副教授,主要从事塑料增韧改性研究工作 E-mail:gfwu@mail.ccut.edu.cn

中图分类号: TB332;TQ325.3
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出版历程
- 收稿日期: 2004-05-27
- 修回日期: 2004-09-06
- 刊出日期: 2005-06-14

PROPERTIES OF CORE2SHELL MODIFIER AIM/ PVC BLENDS

1.
Institute of Science, Northeast University, Shenyang 110006, China;
2.
School of Chemical Engineering, Changchun University of Technology, Changchun 130012, China;
3.
Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China

摘要

摘要: 采用自制的丙烯酸丁酯接枝甲基丙烯酸甲酯核壳结构增韧剂( PBA-g-PMMA, AIM) 与聚氯乙烯( PVC) 树脂熔融共混, 制备了AIM/ PVC 共混物。研究了增韧剂粒子在PVC 中的分散和空洞化、AIM/ PVC 共混物的断裂与脆韧转变。结果表明, 球形的增韧剂粒子能够在PVC 树脂中均匀分散并对PVC 有很好的增韧作用, 在PVC 树脂中加入质量分数为615 %AIM 时, 冲击样条以韧性方式断裂; 样条冲击断面周围应力发白区域内产生了空洞。提出AIM 增韧PVC 的机理是橡胶粒子的空洞化与塑料基体剪切屈服协同作用。
- 核壳粒子 /
- 丙烯酸酯抗冲击改性剂 /
- 脆韧转变 /
- 空洞化
Abstract: Core-shell st ructured acrylate impact modifier (AIM) particles of poly ( butyl acrylate) graf ted poly(methyl methacrylate) ( PBA-g-PMMA) were synthesized, which were used to prepare AIM/ PVC blends by melting process. AIM particles dist ribution and it s cavitations in PVC resin, the f racture and brittle-ductile t ransition ofAIM/ PVC blends were investigated. The result s show that spherical AIM particles well disperse in the PVC mat rixand toughen the PVC resin effectively. The impact test samples with 615 % (mass f raction) AIM modifiers broke inductile failure. It was found that cavitations are formed in the st ress-whitened area near the fracture surface. Thetoughening mechanism of PVC is synergistic toughening by cavitations of the rubber particles and shear yielding ofthe mat rix.
- core-shell particles /
- acrylic impact modifier (AIM) /
- brittle-ductile transition /
- cavitation