Change in thermal transitions and water uptakes of poly(l-lactic acid) blends upon hydrolytic degradation
Hideko T Oyama1, Daisuke Tanishima2, Shintaro Maekawa3
1Department of Chemistry, College of Science, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima-ku, Tokyo 171-8501, Japan; School of Chemical Engineering, Fuzhou University, No. 2 Xueyuan Rd, Minhou County, Fuzhou 350116, People׳s Republic of China.
Abstract:
This article reports experimental data related to the research article entitled "Poly(malic acid-co-l-lactide) as a Superb Degradation Accelerator for Poly(l-lactic acid) at Physiological Conditions" (H.T. Oyama, D. Tanishima, S. Maekawa, 2016) [1]. Hydrolytic degradation of poly(l-lactic acid) (PLLA) blends with poly(aspartic acid-co-l-lactide) (PAL) and poly(malic acid-co-l-lactide) (PML) oligomers was investigated in a phosphate buffer solution at 40 °C. It was found in the differential scanning calorimetry measurements that upon hydrolysis the cold crystallization temperature (T ) and the melting temperature (T ) significantly shifted to lower temperature. Furthermore, the hydrolysis significantly promoted water sorption in both blends.
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