Synthesis of Poly(isosorbide carbonate) via Melt Polycondensation Catalyzed by Ca/SBA-15 Solid Base  

作　　者：Xiao-Long Shen Zi-Qing Wang Qing-Yin Wang Shao-Ying Liu Gong-Ying Wang 

机构地区：[1]Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China [2]University of Chinese Academy of Sciences, Beijing 100049, China [3]Changzhou Institute of Chemistry, Changzhou 213164, China

出　　处：《Chinese Journal of Polymer Science》2018年第9期1027-1035,共9页高分子科学（英文版）

基　　金：financially supported by the National Key R&D Program of China(No.2016YFB0301900);the Science and Technology Support Program of Sichuan Province(No.2015GZ0065)

摘　　要：Ca/SBA-15 solid bases with different Ca/Si atomic ratios were prepared by a one-pot route and employed as catalysts for the production of poly（isosorbide carbonate） （PIC） from diphenyl carbonate and isosorbide via a transesterification polymerization process. The relationship between physicochemical properties and catalytic performance for Ca/SBA-15 in this melt process was investigated by means of various characterization techniques. It was found that basic site amount and strength were responsible for this transesterification process; the weak and medium basic sites inclined to promote polycondensation reaction. It was worth noting that strong basic sites could favor the decomposition of the resultant P/C, resulting in the decrease of weight-average molecular weight （Mw） and yield, and the sample with Ca/Si atomic ratio of 0.4 exhibited the best catalytic performance, giving PIC with Mw of 4.88 × 10^4 g/mol and Tg of 169 ℃ at the optimal conditions. This excellent activity can be ascribed to the presence of rich basic sites and specific basic strength on the surface of 0.4Ca/SBA-15.Ca/SBA-15 solid bases with different Ca/Si atomic ratios were prepared by a one-pot route and employed as catalysts for the production of poly（isosorbide carbonate） （PIC） from diphenyl carbonate and isosorbide via a transesterification polymerization process. The relationship between physicochemical properties and catalytic performance for Ca/SBA-15 in this melt process was investigated by means of various characterization techniques. It was found that basic site amount and strength were responsible for this transesterification process; the weak and medium basic sites inclined to promote polycondensation reaction. It was worth noting that strong basic sites could favor the decomposition of the resultant P/C, resulting in the decrease of weight-average molecular weight （Mw） and yield, and the sample with Ca/Si atomic ratio of 0.4 exhibited the best catalytic performance, giving PIC with Mw of 4.88 × 10^4 g/mol and Tg of 169 ℃ at the optimal conditions. This excellent activity can be ascribed to the presence of rich basic sites and specific basic strength on the surface of 0.4Ca/SBA-15.

关 键 词：Ca/SBA-15 Poly（isosorbide carbonate） Diphenyl carbonate TRANSESTERIFICATION Basic sites 

分 类 号：O633.14[理学—高分子化学] O643.32[理学—化学]