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Journal of Nanomaterials
Volume 2010, Article ID 287082, 8 pages
http://dx.doi.org/10.1155/2010/287082
Research Article

Preparation, Mechanical, and Thermal Properties of Biodegradable Polyesters/Poly(Lactic Acid) Blends

1The Institute for Advanced Materials and Nano Biomedicine, Tongji University, Shanghai 200092, China
2Department of Chemistry, Tongji University, Shanghai 200092, China
3Institute of Nano and Bio-Polymeric Materials, School of Material Science and Engineering, Tongji University, Shanghai 200092, China
4Key Laboratory Advanced Civil Engineering Materials, Tongji University, Ministry of Education, Shanghai 200092, China

Received 30 September 2009; Accepted 27 November 2009

Academic Editor: Huisheng Peng

Copyright © 2010 Peng Zhao et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Series of biodegradable polyesters poly(butylene adipate) (PBA), poly(butylene succinate) (PBS), and poly(butylene adipate-co-butylene terephthalate) (PBAT) were synthesized successfully by melt polycondensation. The polyesters were characterized by Fourier transform infrared spectroscopy (FTIR), , differential scanning calorimetry (DSC), and gel permeation chromatography (GPC), respectively. The blends of poly(lactic acid) (PLA) and biodegradable polyester were prepared using a twin screw extruder. PBAT, PBS, or PBA can be homogenously dispersed in PLA matrix at a low content (5–20 wt%), yielding the blends with much higher elongation at break than homo-PLA. DSC analysis shows that the isothermal and nonisothermal crystallizabilities of PLA component are promoted in the presence of a small amount of PBAT.