摘要
以高黏尼龙6(PA6)为基体,加入增韧剂、增塑剂,成功制备了低弯曲弹性模量挤出级改性PA6。研究结果表明,在聚乙烯接枝马来酸酐(PE-g-MAH)增韧PA6中,加入增塑剂己内酰胺,大幅改善了PA6的柔顺性。当己内酰胺用量为12.5份、PE-g-MAH用量为12份时,增韧PA6的弯曲强度及弯曲弹性模量分别达到15.3 MPa和600 MPa,而悬臂梁缺口冲击强度高达109.4 k J/m2,从而使增韧PA6保持了一定的刚性,同时还具有橡胶的柔顺性。差示扫描量热分析表明,加入己内酰胺并没有破坏PA6分子内部的氢键,反而增加了PA6分子链段重排的能力,使其规整度进一步增加,当己内酰胺用量从0份增加至10份时,PA6的结晶度从34.21%提高到40.58%。
The extrusion grade modified nylon6(PA6)with low flexural modulus was prepared by the high viscosity PA6resin as matrix and the addition of toughener and plasticizer.The results show that the flexibility of the polyethylene grafted anhydride(PE-g-MAH)toughening PA6was greatly improved by the addition of plasticizer caprolactam.When the contents of caprolactam and PE-g-MAH are12.5phr and12phr respectively,the flexural strength and flexural modulus of the PA6reach15.3MPa and600MPa respectively,and the Izod notched impact strength is as high as109.4kJ/m2,so that the modified PA6retains certain rigid,meanwhile has the flexibility of rubber.DSC analysis shows,the addition of caprolactam does not destroy the PA6internal hydrogen bonding,on the contrary,increases the rearrangement ability of molecular chain and regularity,so the crystallinity of nylon6increases from34.21%to40.58%when the content of caprolactam increases from0phr to10phr.
作者
张伟
吴玉成
孙圳
袁锦瑶
Zhang Wei;Wu Yucheng;Sun Zhen;Yuan Jinyao(Nanjing Lihan Chemical Co., Ltd., Nanjing 211102, China)
出处
《工程塑料应用》
CAS
CSCD
北大核心
2017年第5期40-44,共5页
Engineering Plastics Application
