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

Title
High Thermal Stability of Bio-Based Polycarbonates Containing Cyclic Ketal Moieties
Author
서동학
Keywords
SOLID-STATE POLYMERIZATION; ACETALIZED GALACTARIC ACID; DIMETHYL CARBONATE; D-MANNITOL; POLYESTERS; ISOSORBIDE; COPOLYCARBONATES; POLYMERS; RESOLUTION; MONOMERS
Issue Date
2015-10
Publisher
AMER CHEMICAL SOC
Citation
MACROMOLECULES, v. 48, NO 19, Page. 6839-6845
Abstract
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 H-1, C-13, 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 PCaG(20)BPA(80)C. The high thermal stability (T-d value above 350 degrees C) and glass transition temperature (T-g value from 128 to 151 degrees 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.
URI
http://pubs.acs.org/doi/10.1021/acs.macromol.5b01112http://hdl.handle.net/20.500.11754/28293
ISSN
0024-9297; 1520-5835
DOI
10.1021/acs.macromol.5b01112
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > CHEMICAL ENGINEERING(화학공학과) > Articles
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