对苯二甲酸间苯二甲胺盐共聚改性PA6的制备及性能  

Preparation and Performance of Modified Polyamide 6 Copolymerized with m-Xylylenediamine Salt of Terephthalic Acid

作　　者：张英伟 杨威 易勇 黄安民[3] 杨军[3] Zhang Yingwei;Yang Wei;Yi Yong;Huang Anmin;Yang Jun(School of Packaging and Materials Engineering,Hunan University of Technology,Zhuzhou 412007,China;BOGE Rubber&Plastics(Zhuzhou)Co.,Ltd.,Zhuzhou 412001,China;Zhuzhou Times New Material Technology Co.,Ltd.,Zhuzhou 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 [2]博戈橡胶塑料(株洲)有限公司,湖南株洲412001 [3]株洲时代新材料科技股份有限公司,湖南株洲412007

出　　处：《工程塑料应用》2023年第6期35-39,共5页Engineering Plastics Application

摘　　要：为了提升聚酰胺(PA)6的耐热性能和力学性能,选用间苯二甲胺(MXDA)和对苯二甲酸(PTA)为原材料,先合成对苯二甲酸间苯二甲胺盐(MXDA-T盐),再与己内酰胺共缩聚,制备得到一系列MXDA-T盐改性PA6树脂。傅里叶变换红外光谱测试结果表明MXDA-T盐链段成功引入PA6分子主链中;树脂相对黏度测试结果表明MXDA-T盐具有较高的反应活性,可获得相对黏度较高的MXDA-T盐改性PA6树脂;热重测试结果表明随着MXDA-T盐用量的增加,MXDA-T盐改性PA6树脂的热稳定性逐步提升;动态力学热分析和差示扫描量热分析的结果表明,随着共聚组分中MXDA-T盐用量增加,MXDA-T盐改性PA6树脂的熔融和结晶温度降低,玻璃化转变温度提高,当MXDA-T盐组分质量分数为20%和30%时,聚合物由半结晶态转变为非晶态;力学性能测试结果表明随着共聚组分中MXDAT盐用量的逐步提升,改性PA6树脂的拉伸强度、弯曲强度、弯曲弹性模量和缺口冲击强度均呈现出先减后增的变化趋势,当MXDA-T盐的质量分数为30%时,改性PA6树脂的力学性能最佳。In order to improve the heat resistance and mechanical properties of polyamide(PA)6,m-xylylenediamine(MXDA)and terephthalic acid(PTA)was selected as raw materials,then the MXDA salt of PTA(MXDA-T salt)first was synthesized,and then it was copolymerized with caprolactam to prepare a series of MXDA-T salt modified PA6 resins.The infrared spectrum test results indicate that the MXDA-T salt segment of polyamide is successfully introduced into PA6 molecular main chain.The relative viscosity test results of the resin indicate that the MXDA-T salt has high reaction activity and MXDA-T salt modified PA6 resin with high relative viscosity can be obtained.The thermogravimetric test results show that with the increase of the content of MXDA-T salt,the thermal stability of MXDA-T salt modified PA6 resin gradually improves.The results of dynamic mechanical thermal analysis and differential scanning calorimetry analysis show that with the increase of MXDA-T salt content in the copolymer component,the melt and crystallization temperature of MXDA-T salt modified PA6 resin decrease,and the glass transition temperature increases.When the contnet of MXDA-T salt reaches 20 wt%and 30 wt%,the polymer changes from semi crystalline to amorphous.The test results of mechanical properties show that with the gradual increase of the content of MXDA-T salt in the copolymer components,the tensile strength,bending strength,bending modulus,and notch impact strength of MXDA-T salt modified PA6 resin show a trend of first decreasing and then increasing.When the content of MXDA-T salt is 30 wt%,the mechanical properties of MXDA-T salt modified PA6 resin are the best.

关 键 词：聚酰胺6 对苯二甲酸间苯二甲胺盐 共聚改性 耐热性能 力学性能 

分 类 号：TQ323.6[化学工程—合成树脂塑料工业]