Synthesis and Characterization of PLA-Based Aliphatic-Aromatic Copolyesters: Effect of Diols

Abstract:

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PLA-based aliphatic aromatic copolyesters have been synthesized and characterized in order to incorporate the degradability of PLA and good mechanical properties of aromatic species. Synthesis of the copolymers was conducted by polycondensation of lactic acid with dimethyl terephthalate (DMT) and various diols using stannous(II) octoate as a catalyst. Three types of diols with different methylene lengths were employed, i.e., ethylene glycol (EG), propylene glycol (PG) and 1, 4-butanediol (BD). Effects of diols and comonomer molar ratio on the extent of polycondensation reaction and molecular weight of the resulting copolymers were investigated. Diacids and diol ratios of L-lactic acid (LLA), dimethyl terephthalate (DMT) and diol of 1/1/2, 1/2/4 and 2/1/2 were employed. Characterization of chemical structure, molecular weight and thermal and physical properties of the resulting copolymers were conducted by FTIR, NMR, and DSC.

Info:

Periodical:

Advanced Materials Research (Volumes 55-57)

Main Theme:

Edited by:

Tawee Tunkasiri

Pages:

785-788

DOI:

10.4028/www.scientific.net/AMR.55-57.785

Citation:

M. Namkajorn et al., "Synthesis and Characterization of PLA-Based Aliphatic-Aromatic Copolyesters: Effect of Diols", Advanced Materials Research, Vols. 55-57, pp. 785-788, 2008

Online since:

August 2008

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$35.00

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