羟丙基甲基纤维素接枝聚己内酯二醇的合成、表征及性能

Synthesis, Characterization and Property of Hydroxypropyl Methylcellulose Grafting Polycaprolactone Diol

摘要: 采用羟丙基甲基纤维素(HPMC)和聚己内酯二醇(PCL)为原料，以4，4'-二苯基甲烷二异氰酸酯(MDI)为接枝桥梁，利用酰胺化反应将PCL接枝到HPMC分子上，成功合成了改性接枝聚合物羟丙基甲基纤维素接枝聚己内酯(HPMC-g-PCL)。利用红外光谱(IR)表征了产物结构，探讨了MDI在整个过程的桥联作用，利用热重分析(TGA)和示差扫描量热分析(DSC)对合成产物的热性能进行了表征，结果表明HPMC经PCL接枝改性后，失重率降低，热稳定性得到增强。

Abstract: Hydroxypropyl methylcellulose grafting polycaprolactone diol (HPMC-g-PCL) was successfully synthesized using 4,4’-diphenylene methane diisocyanate (MDI) as grafting bridge. The structure of the product was characterized with FT-IR spectroscopy．The thermal properties of the product was tested with thermogravimetry analysis (TGA) and differential scanning calorimetry (DSC). The results show that the rate of weight-lost of HPMC-g-PCL is decreased comparing with HPMC, and the thermal stability of HPMC-g-PCL is increased.