尼龙11/HGB复合材料的非等温结晶动力学

采用熔融共混法制备了尼龙(PA)11/空心玻璃微珠(HGB)(PA11/HGB)复合材料,应用差示扫描量热(DSC)仪研究了不同HGB用量下的PA11/HGB复合材料的非等温结晶过程,采用Jeziorny法和Mo法研究了复合材料的非等温结晶动力学,采用X射线衍射(XRD)仪研究了复合材料的晶型变化情况。DSC结果表明,随着降温速率的增加,复合材料的结晶温度总体上降低,结晶温度区间变宽;HGB在PA11基体中起到了异相成核作用。Jeziorny法不适用于PA11/HGB复合材料的非等温结晶动力学研究,而Mo法较为适合,其研究结果表明适量的HGB具有加速PA11基体结晶的作用,但当HGB用量达到8份后,这种作用趋于稳定。XRD结果表明,HGB可诱导PA11基体生成新的β晶。

Non-isothermal Crystallization Kinetics of Nylon 11/Hollow Glass Bead Composite

Nylon (PA) 11/hollow glass bead (HGB) (PA11/HGB) composites were prepared by melt blending method. The non-isothermal crystallization processes of the composites under different HGB contents were studied by DSC and the non-isother-mal crystallization kinetics was researched using Jeziorny method and Mo method. The crystal form changes of the composites were studied by XRD. The DSC results indicate that with increase of cooling rate,the crystallizing temperature of the composite decreases in total and the crystallizing temperature range enlarges,HGB has heterogeneous nucleation effect in PA11 matrix. Jeziorny method is inappropriate for studying the non-isothermal crystallization kinetics of the composites,but Mo method is suitable for studying the kinetics and its results show that HGB with proper contents has the effect of accelerating crystallization of PA11 matrix,when the content of HGB reaches 8 phr or more,the effect tends to stability. XRD results show that HGB can induce PA11 matrix forming a newβcrystal.