Preparation of PLLA/PLGA Composite by Melt-blending and Its Mechanical Property

Abstract

Poly(L-lactide)/poly(lactide-co-glycolide) (PLLA/PLGA) composite using PLLA and PLGA as the starting materials was successfully prepared via melt-blending method. Fourier Transform Infrared (FTIR) spectroscopy was used to characterize the structure of PLLA and PLGA in composite. The mechanical properties of composites were carried out by the tensile test, and the micrographs of cross-section of composites were observed using SEM. The results indicate that a few interactions formed between PLLA and PLGA in composite after melt-blending, and both the tensile strength and tensile modulus of composites decreased and the toughness became better with increasing PLGA content. The PLLA/PLGA composite with adjustable mechanical properties by changing the PLGA content would be an ideal and promising biomaterial for tissue regeneration.