High Thermal Stability of Bio-Based Polycarbonates Containing Cyclic Ketal Moieties

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• 作者：Gwang-Ho Choi ; Da Young Hwang ; Dong Hack Suh
• 刊名：Macromolecules
• 出版年：2015
• 出版时间：October 13, 2015
• 年：2015
• 卷：48
• 期：19
• 页码：6839-6845
• 全文大小：375K
• ISSN：1520-5835

文摘

Bio-based polycarbonates containing cyclic ketal moieties were designed, and the bio-based diol monomer was synthesized by CQ with glycerol to improve their thermal properties and replace BPA in polymer industry. The molecular structure of the novel bio-based diol monomer 2,2:3,3-bis(4鈥?hydroxymethylethylenedioxy)-1,7,7-trimethylbicyclo[2.2.1]heptane (abbreviated as CaG) was analyzed by ¹H, ¹³C, and 2D-COSY NMR techniques. GPC results show that CaG was reacted successfully and led to the high molecular weights for homopolycarbonate (M_w = 18鈥?52) abbreviated as PCaGC and for copolycarbonate (M_w = 78鈥?82) as PCaG₂₀BPA₈₀C. The high thermal stability (T_d value above 350 掳C) and glass transition temperature (T_g value from 128 to 151 掳C) of PCaGCs and PCaG_xBPA_yCs were studied by TGA and DSC, respectively. Given the sufficient reactivity and high thermal stability, CaG is a promising renewable building block for applicable polymers.