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

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′-hydroxy­met...

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Bibliographic Details
Published in:Macromolecules 2015-10, Vol.48 (19), p.6839-6845
Main Authors: Choi, Gwang-Ho, Hwang, Da Young, Suh, Dong Hack
Format: Article
Language:English
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Summary: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′-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 = 18 652) abbreviated as PCaGC and for copolycarbonate (M w = 78 482) as PCaG20BPA80C. The high thermal stability (T d value above 350 °C) and glass transition temperature (T g value from 128 to 151 °C) of PCaGCs and PCaG x BPA y Cs 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.
ISSN:0024-9297
1520-5835
DOI:10.1021/acs.macromol.5b01112