Citation: Xiao-Long Shen, Zi-Qing Wang, Qing-Yin Wang, Shao-Ying Liu, Gong-Ying Wang. Synthesis of Poly(isosorbide carbonate) via Melt Polycondensation Catalyzed by Ca/SBA-15 Solid Base[J]. Chinese Journal of Polymer Science, ;2018, 36(9): 1027-1035. doi: 10.1007/s10118-018-2137-4 shu

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

a.
Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu 610041, China
b.
University of Chinese Academy of Sciences, Beijing 100049, China
c.
Changzhou Institute of Chemistry, Changzhou 213164, China

Corresponding author: Gong-Ying Wang, wanggongying1102@126.com
Received Date: 5 December 2017
Revised Date: 22 March 2018
Accepted Date: 26 March 2018
Available Online: 25 April 2018

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 PIC, resulting in the decrease of weight-average molecular weight (M_w) and yield, and the sample with Ca/Si atomic ratio of 0.4 exhibited the best catalytic performance, giving PIC with M_w of 4.88 × 10⁴ g/mol and T_g of 169 °C 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,
- Poly(isosorbide carbonate),
- Diphenyl carbonate,
- Transesterification,
- Basic sites
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