Nano-SiO_2对低熔点PA6结构与性能的影响  

Effect of Nano-SiO_2 on Structure and Properties of Low Melting Point PA6

作　　者：李诚[1,2] 鲁圣军[1,2] 刘典新[1,2] 王彩红[1,2] 于杰[1,2] 

机构地区：[1]贵州大学材料科学与冶金工程学院,贵州贵阳550025 [2]国家复合改性聚合物材料工程技术研究中心,贵州贵阳550014

出　　处：《塑料科技》2014年第1期68-72,共5页Plastics Science and Technology

基　　金：贵州省自然科学基金项目(黔科合J字[2012]2123号);贵阳市工业振兴科技计划项目([2012101]2-11)

摘　　要：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 research focused on the effect of nano-SiO2 contents on the crystallization process and the properties of the polyamide 6 （PA6）lCaCI21nano-SiO2 composites which were prepared through melting extrusion. The results show that the coordination of Ca＊ and amide groups is undermined by nano-SiO2; on the other hand, nano-SiO2 can act as a nucleation agent and increase the nucleation site and nucleation rate of PA6 because of its high surface activity, but the overdose of nano-SiO2 will lead to the gathering, this will not be good for the dispersion of nano-SiO2. When the content of nano-SiO2 is 0.5 phr, the notch impact strength, vicat softening point and melt flow rate （MFR） of PA6/CaCl2/nano-SiO2 can increase obviously.

关 键 词：低熔点聚酰胺6 纳米二氧化硅 氯化钙 结构 性能 

分 类 号：TB383.1[一般工业技术—材料科学与工程]