纳米氧化锌填充PBS复合材料性能的研究

摘要

Nano-ZnO was surface modified with KH-550, with which poly （butylene succinate） （PBS）/nano-ZnO composites were prepared via melt blending. The mechanical, thermal, and non- isothermal crystallization behavior of the composites were studied using SEM, TG, and DSC, respectively. The thermal degradation behavior was analyzed using Ozawa-Flynn-Wall method. It showed that the tensile and flexural strengths of PBS/nano-ZnO composites increased with adding nano-ZnO, but impact strength decreased. Surface modification could improve the interracial compatibility between nano-ZnO and PBS matrix and the dispersion of nano-ZnO in PBS matrix. Thus the mechanical properties of the composites were enhanced. The crystallization rate of PBS was increased when nano-ZnO was added, and the thermal degradation activation energy was decreased.%采用硅烷偶联剂（KH-550）对纳米氧化锌进行了表面改性，通过熔融共混法制备了聚丁二酸丁二醇酯（PBS）／纳米氧化锌复合材料，利用扫描电子显微镜、热重分析仪、差示扫描量热仪等对复合材料的力学性能、热性能和非等温结晶性能进行了研究分析，并通过Ozawa-Flynn-Wall方法分析了复合材料的热降解行为。结果表明，纳米氧化锌能提高PBS的拉伸强度和弯曲强度，但降低了其冲击强度；改性后的纳米氧化锌可以提高其与PBS的界面相容性，并提高其在PBS基体中的分散性能，不同程度地提高了复合材料的力学性能；纳米氧化锌提高了PBS的结晶速率，降低了其热解反应活化能。