玻璃纤维增强PA66复合材料非等温结晶动力学的研究

采用差示扫描量热仪对玻璃纤维（GF）增强聚酰胺66（PA66）复合材料进行了非等温结晶研究；用莫志深法和Kissinger法计算并得到了非等温结晶动力学参数。结果表明，GF对PA66基体具有异相成核作用，可提高其结晶速率；当GF含量为30 %（质量分数，下同）时，复合材料的结晶速率最大；在相同时间内,复合材料的结晶度越大,其所需的降温速率越大；PA66、PA66/15 %GF、PA66/30 %GF、PA66/45 %GF的结晶活化能分别为-297.22、-356.32、-481.00、-365.59 kJ/mol。

Study on Nonisothermal Crystallization Kinetics of Glass Fiber Reinforced PA66 Composites

The crystallization behavior of glass fiber reinforced PA66 composites was characterized using DSC. Parameters of isothermal and non isothermal crystallization kinetics were calculated using of Mo and Kissinger methods. It showed that glass fiber played as a heterogeneous nucleating agent, which increased the crystallization rate of PA66. When the glass fiber content was 30 %, the crystallization rate reached the maximum. The greater the cooling rate, the greater the degree of crystallinity. The crystallization activation energy of the composites were -297.22, -356.32, -481.00, and -365.59 kJ/mol, respectively, when the glass fiber contents were 0, 15 %, 30 %, and 45 %.