合成条件对MCPA6性能的影响  

Effects of Synthesis Conditions on Properties of MCPA6

作　　者：叶玉婷 孔奇胜 陈宪宏[1] YE Yuting;KONG Qisheng;CHEN Xianhong(College of Packaging and Materials Engineering,Hunan University of Technology,Zhuzhou Hunan 412007,China)

机构地区：[1]湖南工业大学包装与材料工程学院,湖南株洲412007

出　　处：《包装学报》2024年第1期57-63,共7页Packaging Journal

基　　金：湖南省自然科学基金资助项目(2022JJ50004);湖南省教育厅科学研究基金资助项目(20A149)。

摘　　要：以己内酰胺为单体、氢氧化钠为引发剂、甲苯-2,4-二异氰酸酯为活化剂,采用阴离子聚合法合成MCPA6,并探讨了引发剂摩尔比、聚合温度对合成MCPA6的影响。研究结果显示,随着引发剂摩尔比增加,单体转化率呈先增大后轻微减小的变化趋势,当引发剂摩尔比为0.0044时,单体转化率达到最高91.5%,结晶度为44.5%,样品的抗拉强度为83.6 MPa,弯曲强度为112.4 MPa,冲击强度为5.3 kJ/m^(2)。在所研究的温度范围内,随聚合温度的升高,单体转化率呈轻微增大变化,样品的力学性能呈现先增强后减弱的变化规律,其中抗拉强度和弯曲强度在160℃时达到最大值,冲击强度在170℃时达到最大值。因此,当引发剂摩尔比为0.0044、聚合温度为160℃时,MCPA6呈现了较好的工艺稳定性。本合成方法具有一定的应用价值。MCPA6 was synthesized by anion polymerization withε-caprolactam as monomer,NaOH as initiator and toluene 2,4-diisocyanate as activator.The effects of initiator molar ratio and polymerization temperature on the synthesis of MCPA6 were discussed.The research results showed that as the initiator content increased,the monomer conversion rate showed a trend offirst increasing and then slightly decreasing.When the molar ratio of initiator was 0.0044,the monomer conversion rate reached the highest value of 91.5%,with a crystallinity of 44.5%.The tensile strength of the sample was 83.6 MPa,the flexural strength was 112.4 MPa,and the impact strength was 5.3 kJ/m^(2).Within the studied temperature range,with the increase of polymerization temperature,the monomer conversion rate slightly increased,and the mechanical properties of the sample showed a trend offirst increasing and then decreasing.The tensile strength andflexural strength reached their maximum values at 160℃,and the impact strength reached their maximum values at 170℃.Therefore,when the molar ratio of initiator was 0.0044 and the polymerization temperature was 160℃,MC nylon 6 showed good process stability.This synthesis method had certain application value.

关 键 词：MCPA6 引发剂 聚合温度 

分 类 号：TQ323.6[化学工程—合成树脂塑料工业]