采用傅里叶红外光谱研究聚醚醚酮(PEEK)及其复合材料的化学结构,通过差示扫描量热法研究它们的非等温结晶过程,并采用Jeziorny方程进行非等温结晶动力学分析,获得相关非等温动力学参数。结果表明,PEEK与短纤维复合过程中没有发生化学变化,随着升温速率的增加,PEEK及其复合材料的动力学结晶速率常数(Zt)和非等温结晶速率常数(Zc)增大,半结晶时间减小,结晶速率加快,n值均约为3。玻璃纤维和碳纤维在PEEK复合材料结晶过程中起到成核剂的作用,生长方式为三维生长。
The chemical structure of polyetheretherketone(PEEK) and its composites were studied by FT-IR.The non-isothermal crystallization process of PEEK resin and short fiber filled PEEK composites were studied by DSC,and analyzed the non-isothermal crystallization kinetic of PEEK and its composite materials by Jeziorny method to obtain relevant non-isothermal kinetic parameters.The results shown that there was no chemical change during the compounding process of PEEK and short fiber.With the increased of the heating rate,the dynamic crystallization rate constant (Zt),the non-isothermal crystallization rate constant (Zc) and crystallization rate (t-11/2) of all increased,and the half crystallization time decreased,the n value of PEEK and its composite materials were about 3.Glass fiber and carbon fiber played the role of nucleating agent in the crystallization process of PEEK composites and its growth mode was 3D growth.
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基金资助
国家自然科学基金资助项目(51378315)
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