Structural and thermal properties of poly(1,4-cyclohexane dimethylene terephthalate) containing isosorbide

Title
Structural and thermal properties of poly(1,4-cyclohexane dimethylene terephthalate) containing isosorbide
Authors
임승순
Keywords
NONISOTHERMAL CRYSTALLIZATION KINETICS; POLYESTER COPOLYMER GLASSES; POLY(BUTYLENE TEREPHTHALATE); COCRYSTALLIZATION BEHAVIOR; MONONITRATE TREATMENT; MECHANICAL-PROPERTIES; SECONDARY RELAXATION; ETHYLENE-GLYCOL; POLYMERIZATION; COPOLYESTERS
Issue Date
2015-08
Publisher
ROYAL SOC CHEMISTRY
Citation
POLYMER CHEMISTRY, v. 6, NO 39, Page. 6973-6986
Abstract
Poly(1,4-cyclohexanedimethylene isosorbide terephthalate) (PICT) copolymers were synthesized by melt condensation with various contents of the corn derived monomer isosorbide (ISB). Since poly(1,4-cyclohexanedimethylene terephthalate) (PCT) has disadvantageous thermal processing properties as well as a high melting temperature, ISB could be used to control T-g and T-m simultaneously. An increased content of ISB can increase the T-g and lower the T-m by affecting the crystallization behavior and structural properties of PCT. The composition of PICT was confirmed using H-1-NMR spectroscopy, and the detailed structure was analyzed with correlation spectroscopy (COSY) and heteronuclear single-quantum correlation spectroscopy (HSQC). C-13-NMR spectroscopy was used for investigating the sequence distribution and from these results, the effect of the ISB-TPA dyad on the thermal properties was revealed. Solid state cross polarization/magic angle spinning (CPMAS) C-13-NMR spectroscopy was used to investigate the free space of an atom due to environment dependent relaxation behavior, which determines whether ISB is excluded from the crystal structure. Then, WAXD was used to analyze the crystal structure, representing the effect of ISB on the crystallization. Finally, polarized optical microscopy and atomic force microscopy were used to visualize the morphological change of the crystallite resulting from ISB.
URI
http://pubs.rsc.org/en/content/articlelanding/py/2015/c5py01152c#!divAbstracthttp://hdl.handle.net/20.500.11754/26800
ISSN
1759-9954; 1759-9962
DOI
http://dx.doi.org/10.1039/c5py01152c
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > DEPARTMENT OF ORGANIC AND NANO ENGINEERING(유기나노공학과) > Articles
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