为了扩宽尼龙6(PA6)的工程应用领域,首先,通过熔融挤出制备了LiCl/PA6复合材料;然后,利用XRD、DSC、流变仪及电子拉伸试验机等研究了LiCl含量对PA6结晶行为和力学性能的影响及结晶的受限机制.结果表明:随LiCl含量的增加,LiCl/PA6复合体系的成核温度、晶体生长温度及熔融温度均向低温方向移动;成核密度和速率均逐渐减小,导致结晶能力下降,结晶度由原来的36.5％降低为5.6％;γ晶结晶度逐渐降低,而α晶结晶度先增大后减小,γ晶与α晶发生转变.此外,LiCl/PA6复合材料的拉伸强度和冲击强度均先增大后减小;当LiCl含量为6.0wt％时,冲击强度达到最大值7.9 kJ/m2,是纯PA6的冲击强度(5.5 J/m2)的1.44倍.
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