Effect of Hyperbranched Poly(amine-ester) Grafted Nano-SiO2 on Reinforcement and Toughness of PVC |
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Authors: | LI Jie ZHAO Hui SUN Rui-min and LUO Yun-jun |
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Affiliation: | 1. School of Material Science and Engineering, Beijing Institute of Technology, Beijing 100081, China 2. School of Material Science and Engineering, Beijing Institute of Technology, Beijing 100081, China;Research Center of Functional Materials, Kaifeng University, Kaifeng 475001, China |
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Abstract: | Nano-SiO2 was modified using silane coupling agent (KH-550) and hyperbranched poly(amine-ester) respectively, and Poly(vinyl chloride) (PVC)/modified nano-SiO2 composites were made by melt-blending. The composites' structures andmechanical properties were characterized by transmission electron microscopy(TEM), sanning electronic microscopy(SEM) and electronic universal testing machine. The results show that nano-SiO2 grafted by hyperbranched poly (amine-ester) increases obviously in dispersion in PVC matrix, and mechanical properties of PVC are effectively improved. Moreover, it was found that mechanical properties of PVC/nano-SiO2 composites reach the best when weight percent of nano-SiO2 in PVC matrix is 1%. Compared with crude PVC, the tensile strength of hyperbranched poly (amine-ester) grafted nano-SiO2/PVC composite increases by 24.68% and its break elongation, flexural strength and impact strength increase by 15.73%, 4.07% and 1841.84%, respectively. Moreover, the processing of the composites is improved. |
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Keywords: | nano-SiO2 hyperbranched poly (amine-ester) one-step polycondensation dispersion and stability |
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