MC尼龙6/纳米ZnO复合材料等温结晶动力学的研究

Investigation on Isothermal Crystallization Kinetics of the MC Nylon 6/ZnO Nanocomposite

采用原位聚合反应制备了MC尼龙6/纳米ZnO复合材料,并用差示扫描量热法(DSC)研究了MC尼龙6/纳米ZnO复合材料的等温结晶动力学。结果表明,在188～196℃时MC尼龙6及MC尼龙6/纳米ZnO复合材料结晶速率主要由成核过程控制。MC尼龙6/纳米ZnO复合材料的结晶速率G比MC尼龙6提高了0.1～0.3min-1。研究发现,纳米ZnO的加入起到了异相成核的作用,提高了MC尼龙6的结晶速率。MC尼龙6和MC尼龙6/纳米ZnO复合材料的结晶速率G和结晶速率常数k均随结晶温度的升高而降低,半结晶时间t1/2和达到最大结晶速率的时间tmax随结晶温度的升高而缩短。但是MC尼龙6/纳米ZnO复合材料比MC尼龙6降低的幅度更大。

The MC nylon 6/ZnO nanocomposite was prepared by using the in-situ polymerizing reaction, and its isothermal crystallization behavior was studied by the differential scanning calorimetry（DSC）. The results show that the crystallization rate of both MC nylon 6 and MC nylon 6/ZnO nanocomposite are controlled by the nucleating process at 188 ℃ to 196 ℃. As compared to MC nylon 6, the crystallization rate G of MC nylon 6/ZnO nanocomposite increases 0.1 -0.3 min^-1. It is found that the increase of the crystallization rate of MC nylon 6 due to the nano-sized ZnO was used as the heterophase crystal nucleating agents. For both MC nylon 6 and MC nylon 6/ZnO nanocomposite, with increasing the crystallization temperature, the crystallization rate G and its constant k is decreased, the time t1/2 of the half crystallization and that tmax of the maximum crystallization rate is shortened. However, for comparison with MC nylon 6, the decrease content is more obvious for MC nylon 6/ZnO nanocomposite.