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The effect of amino-terminated hyperbranched polymers on the impact resistance of epoxy resins

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Abstract

A novel amino-terminated hyperbranched polymer (ATHBP) was synthesized through the end-capping reaction between hyperbranched polymer with hydroxyl group (HBPH) and diethylenetriamine. The chemical structure of ATHBP was characterized by attenuated total internal reflectance infrared spectroscopy (ATR-IR) and 1H nuclear magnetic resonance spectroscopy (1H NMR). The effect of ATHBP content (0–30 wt%) on the impact resistance and glass transition temperature (Tg) of diglycidyl ether of bisphenol-A epoxy resin was studied. The toughness mechanism was discussed by observing the fracture surface morphologies of epoxy thermosets using field emission scanning electron microscopy (FESEM). The results showed that the degree of branching of ATHBP was 0.56. And the introduction of ATHBP could favorably improve the impact strength but not sacrifice the Tg of epoxy resin. For example, the impact strength of 25 wt% formulation was 60.7 % higher than that of the neat epoxy thermoset. FESEM analysis indicated that the toughening mechanism may be attributed to plastic deformation mechanism.

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Acknowledgments

This study was funded by the National Natural Science Foundation of China (grant number 51202211, 51402251, 51578289, and 51502259), the National Science and Technology Major Project of the Ministry of Science and Technology of China (grant number 2012ZX04010032), the Natural science fund of Jiangsu Province (grant number BK20130428), the joint research fund between Collaborative Innovation Center for Ecological Building Materials and Environmental Protection Equipments and Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province (grant number GX2015107), a project funded by the Flagship Major Development of Jiangsu Higher Education Institutions (grant number PPZY2015A025), and the Research fund of Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province (grant number AE201111).

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Authors and Affiliations

  1. School of Materials Engineering, Yancheng Institute of Technology, Jiangsu, Yancheng, People’s Republic of China, 224051

    Shuiping Li, Huajun Zhu, Tingting Lv, Haijun Hou, Yanbo Li & Qisheng Wu

  2. College of Materials Science and Engineering, Nanjing University of Science and Technology, Jiangsu, Nanjing, People’s Republic of China, 210094

    Shuiping Li & Chong Cui

  3. College of Materials Engineering, Jinling Institute of Technology, Jiangsu, Nanjing, People’s Republic of China, 211169

    Qin Lin

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  1. Shuiping Li
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Correspondence to Chong Cui.

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Li, S., Zhu, H., Lv, T. et al. The effect of amino-terminated hyperbranched polymers on the impact resistance of epoxy resins. Colloid Polym Sci 294, 607–615 (2016). https://doi.org/10.1007/s00396-015-3811-5

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