文献类型：期刊文献

中文题名：异山梨醇与碳酸二甲酯两步法合成聚碳酸酯的工艺

英文题名：Two-step process for synthesizing polycarbonate from isosorbide and dimethyl carbonate

作者：Tao, Guohang[1]; Yu, Jintao[1]; Wei, Yongmei[1]; Wang, Tao[1]; Tian, Hengshui[1]

机构：[1] School of Chemical Engineering, East China University of Science and Technology, Shanghai, 200237, China

年份：2019

卷号：38

期号：10

起止页码：4632

外文期刊名：Huagong Jinzhan/Chemical Industry and Engineering Progress

收录：EI(收录号：20195307949390)

语种：中文

外文关键词：Aberrations - Catalysts - Lithium compounds - Molar ratio - Polycondensation - Refractive index - Transesterification

摘要：Polycarbonate (PC) is synthesized from isosorbide (IS) and dimethyl carbonate (DMC)through transesterification and polycondensation reactions catalyzed by rubidium carbonate (Rb2CO3)and lithium acetylacetonate (LiAcac). The reaction conditions in both steps were fully optimized including the amount of the catalysts, ratio of the raw materials, polycondensation temperature, and the polycondensation residence time. Moreover, FTIR, 1H NMR, 13C NMR, and TGA technologies were used to characterize both transesterification and polycarbonate products. The optimum conditions were obtained as follows: the amount of Rb2CO3 1×10-3mol/molIS, the molar ratio of DMC/IS 14, the amount of LiAcac 2×10-3mol/molIS, polycondensation temperature of 225℃ and polycondensation retention time of 4h. And the intrinsic viscosity, chromatic aberration, Tg of polymer PC could be up to 36.55mL/g, 6.92, 155.6℃, respectively. The Mn of PC is 30659 and Mw is 42551 with Mw/Mn of 1.39, respectively. ? 2019, Chemical Industry Press. All right reserved.