writer：Yan Zhang, Linbo Wu*, Bo-Geng Li
keywords：biodegradable, crosslinking, polycondensation,polyesters
source：期刊
specific source：J Appl Polym Sci 117: 3315–3321, 2010
Issue time：2010年

Novel biodegradable chemically cross-linked polymers, poly(5-hydroxylevulinic acid-co- , -diol)sax (PHLA-diols), were synthesized from 5-hydroxylevulinic acid and α,ω, -diols and characterized by Fourier transformax infrared spectroscopy, differential scanning calorimetry, thermogravimetric analysis, and dynamic mechanical analysis. The gel content, swelling ratio, tensile properties, and hydrolytic degradation behaviors were also measured and assessed. The glass-transition temperature of the PHLA-diols could be adjusted within a wide range (-50 to 30℃)  by the type and feed ratio of the diol. Because of the low exhibited certain elastic properties. The tensile modulus, strength, and elongation at break measured at 37C were 1.4–6.3 MPa, 0.8–1.6 MPa, and 10–25%, respectively. These polymers could be hydrolytically degraded.