title: Change in thermal transitions and water uptakes of poly(l-lactic acid) blends upon hydrolytic degradation.
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 (Tc) and the melting temperature (Tm) significantly shifted to lower temperature. Furthermore, the hydrolysis significantly promoted water sorption in both blends.
authors.affiliation: Department 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.
authors.forename: Hideko T
authors.initials: HT
authors.lastname: Oyama
authors.affiliation: Department of Chemistry, College of Science, Rikkyo University, 3-34-1 Nishi-Ikebukuro, Toshima-ku, Tokyo 171-8501, Japan.
authors.forename: Daisuke
authors.initials: D
authors.lastname: Tanishima
authors.affiliation: R&D Center, Mitsui Chemicals Inc., 580-32 Nagaura, Sodegaura, Chiba 299-0265, Japan.
authors.forename: Shintaro
authors.initials: S
authors.lastname: Maekawa