Impact Resistance Enhancement by Adding Core-Shell Particle to Epoxy Resin Modified with Hyperbranched Polymer

被引：29
作者：
Li, Shuiping [1 ,2 ]
Wu, Qisheng [1 ]
Zhu, Huajun [1 ]
Lin, Qing [3 ]
Wang, Chengshuang [1 ]
机构：
[1] Yancheng Inst Technol, Sch Mat Sci & Engn, Yancheng 224051, Jiangsu, Peoples R China
[2] China Bldg Mat Acad, Inst Cement Sci & New Bldg Mat, Beijing 10024, Peoples R China
[3] Jinling Inst Technol, Sch Mat Engn, Nanjing 211169, Jiangsu, Peoples R China
来源：
POLYMERS | 2017年 / 9卷 / 12期
基金：
中国国家自然科学基金;
关键词：
epoxy; core-shell particle; hyperbranched polymer; impact resistance; reinforcement; MECHANICAL-PROPERTIES; GLASS-FIBER; CLAY NANOCOMPOSITES; THERMAL-PROPERTIES; TENSILE-STRENGTH; MOLECULAR-WEIGHT; COMPOSITES; NANOPARTICLES; THERMOSETS; TOUGHNESS;
D O I：
10.3390/polym9120684
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
A core-shell particle was fabricated by grafting amino-terminated hyperbranched polymer to the surface of silica nanoparticles. The influences of core-shell particle contents on the tensile and impact strength of the epoxy thermosets modified with amino-terminated hyperbranched polymer were discussed in detail. For comparison, core-shell particle was added into the epoxy/polyamide system for toughness improvement. Results from tensile and impact tests are provided. The introduction of core-shell particle into the epoxy/polyamide systems just slightly enhanced the tensile and impact strength. The incorporation of 3 wt % core-shell particle could substantially improve the tensile and impact strength of epoxy/amino-terminated hyperbranched polymer thermosets. Field emission-scanning electron microscope images of the impact fracture surfaces showed that the excellent impact resistance of epoxy/amino-terminated hyperbranched polymer/core-shell particle thermosets may be attributed to the synergistic effect of shearing deformation and crack pinning/propagation, which is induced by the good compatibility between epoxy matrix and core-shell particle in the presence of amino-terminated hyperbranched polymer.
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页数：12
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