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采用熔融挤出法制备了聚酰胺6/氯化钙/纳米二氧化硅(PA6/CaCl2/nano-SiO2)复合材料,研究了nano-SiO2用量对低熔点PA6结晶熔融行为及性能的影响。结果表明:nano-SiO2的加入会破坏体系中Ca2+与酰胺基团的络合配位作用。另外,由于nano-SiO2表面活性非常高,当其用量较低时可在基体中作为成核剂,增加PA6的成核点,提高成核率,而过量的nano-SiO2则会发生团聚,不利于分散。其中,当nano-SiO2用量为0.5phr时,能有效提高复合材料的冲击性能、维卡软化温度以及熔体流动速率(MFR)。
The polyamide 6 / calcium chloride / nano-silica (PA6 / CaCl2 / nano-SiO2) composites were prepared by melt extrusion. The effects of the dosage of nano-SiO2 on the melting behavior and properties of low melting point PA6 were studied. The results showed that the addition of nano-SiO2 could destroy the complexation coordination between Ca2 + and amide groups. In addition, due to the very high surface activity of nano-SiO2, when its dosage is low, it can be used as a nucleating agent in the matrix to increase the nucleation point of PA6 and improve the nucleation rate, while excessive nano-SiO2 will agglomerate. Conducive to decentralization. Among them, when the amount of nano-SiO2 0.5phr, can effectively improve the impact properties of the composite, Vicat softening temperature and melt flow rate (MFR).