Novel semibiobased copolyester containing poly (trimethylene - co - hexamethylene terephthalate) and poly (lactic acid) segments / Zhu Xiong in Industrial & engineering chemistry research, Vol. 49 N° 13 (Juillet 2010)  

Novel semibiobased copolyester containing poly (trimethylene - co - hexamethylene terephthalate) and poly (lactic acid) segments [texte imprimé] / Zhu Xiong, Auteur ; Jian-Bing Zeng, Auteur ; Xiu-Li Wang, Auteur . - 2010 . - pp. 5986–5992.
Industrial chemistry
Langues : Anglais (eng)
in Industrial & engineering chemistry research > Vol. 49 N° 13 (Juillet 2010) . - pp. 5986–5992

Mots-clés :	Polymer Acid
Résumé :	Poly (l-lactic acid) (PLLA) is a biobased polymer, and poly(trimethylene terephthalate) (PTT) is a semibiobased polymer. However, PLLA is biodegradable, and PTT is not. In this paper, their copolymers (PTHT−PLLA) are synthesized via chain-extension reaction of hydroxyl terminated poly(trimethylene-co-hexamethylene terephthalate) (PTHT−OH) and hydroxyl terminated poly(l-lactic acid) (PLLA−OH) using toluene-2,4-diisocyanate (TDI) as a chain extender. The structures and molecular weights of PTHT−OH, PLLA−OH, and PTHT−PLLA were characterized by Fourier transform infrared (FTIR) spectroscopy, proton nuclear magnetic resonance (1H NMR), and gel permeation chromatography (GPC). The thermal, crystalline, and mechanical properties of PTHT−PLLA were further studied by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), wide-angle X-ray diffraction (WAXD), and tensile testing. The resulting PTHT−PLLA copolyesters went through a two-stage thermal decomposition behavior and showed two glass transition temperatures. The tensile testing results showed that PTHT−PLLA copolyesters have excellent flexibility with a strain of more than 300%, which is much higher than that of PLLA. The copolyesters are expected to have a better biodegradability than PTT.
ISSN :	0888-5885
En ligne :	http://pubs.acs.org/doi/abs/10.1021/ie100817h