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Citation: WU Min-Jian, SU Ji-Ying, CHEN Yi-Wang, HE Xiao-Hui, ZHOU Wei-Hua. Preparation of Aliphatic/Aromatic Copolyesters Based on Cyclohexanedimethanol and Oligo(lactic acid)[J]. Chinese Journal of Applied Chemistry, ;2009, 26(7): 766-769. shu

Preparation of Aliphatic/Aromatic Copolyesters Based on Cyclohexanedimethanol and Oligo(lactic acid)

1.
a Institute of Polymer Materials, Nanchang University, Nanchang 330031;
2.
b Jiangxi Institute of Chemical Industry, Nanchang

Corresponding author: CHEN Yi-Wang,
Received Date: 26 June 2008
Available Online: 25 August 2008
Fund Project: 教育部新世纪优秀人才计划(NCET-06-0574) (NCET-06-0574)

A new series of biodegradable copolyesters,PHCTL,were synthesized via polycondensation from dimethyl terephthalate(DMT),1,6-hexanediol(HDO),1,4-cyclohexanedimethanol(CHDM) and oligo(lactic acid) (OLA) in the presence of activator tetrabutyl titanate.The resulting copolyesters,PHCTL,were characterized by ¹H NMR,differential scanning calorimetry(DSC),thermogravimetry(TG) and wide-angle X-ray scattering(WAXS).The melting temperature(T_m) and thermal decomposition temperature(T_d) of the copolyesters increased obviously with increased of the CHDM content.In comparison with the copolyesters without CHDM involved,the T_m and T_d of the copolyesters with a feeding ratio of 50/50 CHDM/HDO increased from 129 ℃ and 361 ℃ to 219 ℃ and 383 ℃,respectively.The molecular mass of the copolyesters varied in a range of 1.7×10⁴~3.6×10⁴ g/mol.The copolyesters were distinctly degraded in phosphate buffer solution at 37 ℃(10% mass loss after 10 days,7% for PHTL).The degradation rates of the copolyesters were dependent on their hydrophilicity.The Young module of PHCTL is 242 MPa.
- copolyester,
- biodegradation,
- lactic acid,
- transesterification
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