【摘要】 利用 DSC 测定了云母增强尼龙66的非等温结晶动力学和热力学的参数。讨论了云母种类、粒度、填加量和偶剂联等结构因素和降温速率对其结晶性能的影响。结果表明,云母具有异相成核作用。由于云母的空间位阻作用,抑制了尼龙66的二次结晶,导致其 Avrami 指数 n 减少。金云母比白云母对尼龙66的结晶更为有利。颗粒较大的云母对尼龙66结晶较有利。随着云母填加量的增加,所有的动力学参数都增大,并在云丹合量达20～30%时,出现峰值。材料的结晶性能还取决于偶联剂的种类。结晶性能的改变是导致材料宏观力学性能变化的重要因素之一。更多还原

【Abstract】 In the present paper,Differential Scanning Calorimetry is used to determine the kinetic parameters and thermodynamic parameters of non-isothermal crystallization of mica-reinforced polyamide 66(MRPA66).The factors biscussed include the sort size and content of mica,the sort of coupling agent,cooling rate and atmosphere etc.The results show that mica has a function of heterogeneous nucleation.Thes- he stereo-selected hindrance of mica restrain the secondary crystallization of MR- PA66,led to a decreased avrami exponent n.Phlogopite a quicker crystallzation rate than muscovite.Large size of mica also increase the crystallization rate. All the kinetic parameters reach their maxima as the content of mica increases to 20—30%.The crystallization character is also dependent on the sort of coupl- ing agents.The variations of crystallization character is one of the key fac- tors to the mechanical properties of the materials.更多还原