等规聚丙烯离聚体增容聚丙烯/尼龙11共混体系研究  

Study on Compatibilizing Polypropylene/Nylon 11 Blends by Isotactic Polypropylene Ionomers

作　　者：杜惠真 杨飞 张坤玉 马哲 王彬[1] 潘莉 李悦生[1] Hui-zhen Du;Fei Yang;Kun-yu Zhang;Zhe Ma;Bin Wang;Li Pan;Yue-sheng Li(Tianjin Key Lab of Composite&Functional Materials and School of Materials Science and Engineering,Tianjin University,Tianjin300350;School of Chemical Engineering and Technology,Tianjin University,Tianjin300350)

机构地区：[1]天津市材料复合与功能化重点实验室,天津大学材料科学与工程学院,天津300350 [2]天津大学化工学院,天津300350

出　　处：《高分子学报》2018年第12期1539-1547,共9页Acta Polymerica Sinica

基　　金：国家自然科学基金(基金号21690071)资助项目

摘　　要：以碘代等规聚丙烯为大分子反应中间体,通过季胺化亲核取代反应和点击化学反应,制备了N-甲基咪唑聚丙烯离聚体(IA)和邻巯基苯胺盐酸盐聚丙烯离聚体(IB),并将其作为等规聚丙烯/生物基尼龙11 (i PP/PA11)共混体系的增容剂.通过动态力学分析(DMA)、扫描电镜(SEM)和力学性能测试,对i PP/PA11/聚丙烯离聚体三元共混体系的相形态与性能进行了系统研究. DMA测试结果显示,2种聚丙烯离聚体使i PP/PA11共混体系的玻璃化转变温度Tg相互靠近;SEM结果显示,离聚体的加入使分散相粒子尺寸显著减小,两相界面作用力增加;力学性能测试表明,iPP/PA11/IA、i PP/PA11/IB三元共混体系的拉伸强度和冲击强度保持较好的水平.以上研究结果表明,IA和IB均可以显著改善i PP/PA11共混体系的相容性.The copolymers of propylene/11-iodo-1-undecene were taken as intermediates and the iodine group underwent a nucleophilic substitution reaction or click reaction with N-methylimidazole or2-mercaptonoaniline to prepare isotactic polypropylene ionomers.Isotactic polypropylene(iPP)and bio-renewable polyamide11(PA11) were mixed with the isotactic polypropylene ionomers to prepare novel polymer blends with excellent physical properties.The miscibility,morphology and mechanical properties of iPP/ionomer blends,PA11/ionomer blends and iPP/PA11/ionomer blends were investigated,respectively.DMA analysis revealed that miscibility of iPP and PAll was improved by addition of the isotactic polypropylene ionomers,which served as an effective compatibilizer and played a key role in improving toughness of iPP/PA11blends.As observed,particles size of the dispersed phase(PA11)was significantly reduced from about20μm to1μm in the ternary blends of iPP/PA11/ionomer.Interface between the matrix and the dispersed phase became blurred and the gap disappeared in the ternary blend of iPP/PA11/ionomer(70/30/5),as observed on the SEM images of the cryo-fractured surface of the blend.Accordingly,notched impact strength of the same ternary blend was greatly improved from 2.11kJ/m2to6.73kJ/m2without significantly sacrificing the tensile strength.To further study the toughening effect of iPP/PA11/ionomer ternary blends,the fracture surface of the impact specimen was also investigated.As proved,the iPP/PA11(70/30)blend showed a smooth and featureless fracture surface without evident deformation,indicating a typical brittle fracture behavior,while the fracture surfaces of the ternary blends was increasingly rough and many irregularities were clearly observed,indicating a ductile fracture behavior.Here we proved that the synthesized isotactic polypropylene ionomers enhanced the two-phase interface interaction and the compatibility in the iPP/PA11/ionomer ternary blend.It is therefore a very promising and effective compatibilizer for iPP/PA11 ble

关 键 词：等规聚丙烯离聚体 聚丙烯 尼龙11 共混 增容 

分 类 号：TQ330.12[化学工程—橡胶工业]