PA6超微化及PA6/PP/硅灰石复合材料制备新方法

New method on preparing of nylon 6 micropowder and PA6/PP/wollastonite composite

采用粒度分析、透射电镜观察、分子量测定及力学性能测试等手段研究尼龙 6( PA6)及与聚丙烯接枝马来酸酐 ( PP g MAH)和硅灰石混合的 PA6在碾磨力场作用下的结构及力学性能的变化 ,实现了 PA6的超微化 ,使用碾磨共混所得的 PA6/PP g MAH/硅灰石混合微粉制备了 PA6/PP/硅灰石复合材料 .研究表明 ,在碾磨力场作用下 ,PA6分子链发生断裂 ,粒度减小 ,最小可以达到 80 nm;碾磨过程中聚合物和填料之间的分散和相互作用使 PA6/PP/硅灰石复合材料的力学性能增加 ,其屈服强度最高达到 5

The structure and mechanical performance of PA6 and the PA6 mixed with PPgMAH and wollastonite induced by panmilling were studied by particle size analysis, TEM observation, viscosity average molecular weight measurement and mechanical properties testes. The results showed that the pan type milling equipment has very high efficiency in pulverizing engineering plastic PA6; wollastonite contributes to the crushing of PA6 particles and the decreasing of its molecular weight when they are ground together. The particle size of PA6 decreased to about 80 nm when PA6 was comilled with wollastonite and PPgMAH for 28 cycles of pan milling. The high mechanical performance PA6/PP/wollastonite composite was prepared using the micropowder, which was obtained by comilling PA6 with wollastonite and PPgMAH.