CAJ | 학술논문

利用二苯基甲烷二异氰酸酯（MDI）的邻位和对位的异氰酸基团与蒙脱土（MMT）的表面羟基发生修饰反应和层间的离子进行置换得到改性蒙脱土，将改性的蒙脱土与PET单体通过原位聚合的方法制备PET/MMT纳米复合材料。通过红外（FT-IR），X射线衍射仪（XRD）和热重（TG）分析了MDI改性的MMT并得到了最优配比，用XRD研究了蒙脱土在PET/MMT纳米复合材料中的分散状态；通过热失重仪（TGA）研究了PET/MMT纳米复合材料的热稳定性能。结果表明，MDI改性MMT不但增加了MMT与PET的相容性，而且提高PET的阻隔性。
이용이분기갑완이이청산지（MDI）적린위화대위적이청산기단여몽탈토（MMT）적표면간기발생수식반응화층간적리자진행치환득도개성몽탈토，장개성적몽탈토여PET단체통과원위취합적방법제비PET/MMT납미복합재료。통과홍외（FT-IR），X사선연사의（XRD）화열중（TG）분석료MDI개성적MMT병득도료최우배비，용XRD연구료몽탈토재PET/MMT납미복합재료중적분산상태；통과열실중의（TGA）연구료PET/MMT납미복합재료적열은정성능。결과표명，MDI개성MMT불단증가료MMT여PET적상용성，이차제고PET적조격성。
In this paper, in order to get organic montmorillonite,MDI’s Ortho and para isocyanate groups with montmorillonite(MMT)surface hydroxyl groups of the modification reaction was used to modified montmorillonite. Then the modified MMT was used to get New-PET by situ polymerization. So montmorillonite modified by MDI can be better dispersed in the PET matrix. Chemical bond may be formed between the substrate and montmorillonite and consistent performance may be greatly enhanced between the matrix properties through the-NCO group. Through the FT-IR,X-ray diffraction (XRD),thermogravimetry (TG),thermal stability, crystallization and state and surface morphology. Then the PET and NEW-PET performance comparison, conclusion. The results showed that the MDI modified PET / MMT nanocomposites not only increases the compatibility of MMT and PET but also improve the barrier properties of PET .