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Polymers 2017, 9(12), 684;

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

School of Materials Science and Engineering, Yancheng Institute of Technology, Yancheng Jiangsu 224051, China
Institute of Cement Science and New Building Materials, China Building Materials Academy, Beijing 10024, China
School of Materials Engineering, Jinling Institute of Technology, Nanjing Jiangsu 211169, China
Authors to whom correspondence should be addressed.
Received: 30 October 2017 / Revised: 26 November 2017 / Accepted: 30 November 2017 / Published: 7 December 2017
(This article belongs to the Collection Polymeric Adhesives)
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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. View Full-Text
Keywords: epoxy; core-shell particle; hyperbranched polymer; impact resistance; reinforcement epoxy; core-shell particle; hyperbranched polymer; impact resistance; reinforcement

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

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Li, S.; Wu, Q.; Zhu, H.; Lin, Q.; Wang, C. Impact Resistance Enhancement by Adding Core-Shell Particle to Epoxy Resin Modified with Hyperbranched Polymer. Polymers 2017, 9, 684.

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