聚对苯甲酰胺存在下尼龙6的结晶化

Crystallization of Nylon 6 in the Presence of PBA

用解偏振光强度法和DSC等方法研究了少量聚对苯甲酰胺(PBA)对尼龙6结晶化过程和热行为的影响.利用Avrami方程处理解偏振光强度法的实验结果,得到了尼龙6及含PBA 1%、2%尼龙6的n值分别为3.3、1.6、1.7.DSC结果表明,尼龙6中掺入少量的PBA会使结晶度提高,X射线衍射显示,当尼龙6中加入少量PBA后,晶格结构并未改变。

Crystallization kinetics of nylon 6 in the presence of poly (p-benzamide) (PBA) was investigated by using the Depolarized Light Intensity (DLI) technique. The experimental results of the crystallization isotherms show that n values, according to the Avrami' s equation, are 3. 3 for nylon 6 and 1. 6, 1. 7 for nylon 6 containing 1 and 2 wt% PBA, respectively. This indicates that the introduction of PBA into the nylon 6 matrix could change the type of nucleation and growth, while the PBA acts as nuclei. The results of DSC show an increase in crystallinity of nylon 6 matrix with the increase of PBA contents. X-ray diffraction analysis of the crystalline nylon 6 in the presence of varying content of PBA was performed. Experimental data show that no changes of molecular unit cell structure occured. The PBA could just change the type of crystallization, and acts as nuclei.