TY - JOUR
T1 - Crystallization behavior of biodegradable poly(L-lactic acid) (PLLA)/poly(butylene succinate) (PBS) blends based on in situ simultaneous wide-angle x-ray diffraction/small-angle x-ray scattering techniques and thermal analyses
AU - Kadowaki, Yasushi
AU - Kojio, Ken
N1 - Funding Information:
In situ SAXS/WAXD measurements were performed in BL03XU at the SPring-8 facility, which was constructed by the Consortium of Advanced Softmaterial Beamline (FSBL), with the approval of the Japan Synchrotron Radiation Research Institute (JASRI; Proposal No. 2015A7207, 2015B7257). We gratefully acknowledge Drs. Hiroyasu Masunaga and Taizo Kabe (JASRI), for their assistance on the SAXS and WAXD measurements. We greatly appreciate Prof. Masamichi Hikosaka and Prof. Masatoshi Tokita, Mr. Kuniaki Yamatake for useful discussion.
Publisher Copyright:
© 2022, The Polymer Society, Taipei.
PY - 2022/4
Y1 - 2022/4
N2 - Crystalline behavior of poly(L-lactic acid) (PLLA), polybutylene succinate (PBS) and their (PLLA/PBS) blends were investigated using differential scanning calorimetry, dynamic viscoelastic property, in situ simultaneous small-angle X-day scattering (SAXS)/wide-angle X-ray diffraction (WAXD) measurements, and scanning electron microscopic observation. The films of PLLA, PBS and (PLLA/PBS) blends with the various weight ratios were prepared by quenching from the molten phase, and then, various measurements were conducted during the crystallization process. Dynamic viscoelastic measurement revealed that the temperature, at which the crystallization of PLLA occurs, shifted to lower temperature side with an increase in the PBS ratio. Furthermore, in situ SAXS/WAXD measurements revealed that the crystallization rate of PLLA increased with blending PBS and crystallization of PBS was almost restricted by blending PLLA although homo PBS was partially crystallized even by quenching from the molten phase due to quite rapid crystallization rate of PBS. These phenomena are due mainly to the molecular dispersed state of PLLA and PBS components formed in the molten state. The results obtained in this study are quite useful to control mechanical properties as well as the crystalline state including crystallinity and melting temperature, and crystal lattice, for PLLA/PBS blend.
AB - Crystalline behavior of poly(L-lactic acid) (PLLA), polybutylene succinate (PBS) and their (PLLA/PBS) blends were investigated using differential scanning calorimetry, dynamic viscoelastic property, in situ simultaneous small-angle X-day scattering (SAXS)/wide-angle X-ray diffraction (WAXD) measurements, and scanning electron microscopic observation. The films of PLLA, PBS and (PLLA/PBS) blends with the various weight ratios were prepared by quenching from the molten phase, and then, various measurements were conducted during the crystallization process. Dynamic viscoelastic measurement revealed that the temperature, at which the crystallization of PLLA occurs, shifted to lower temperature side with an increase in the PBS ratio. Furthermore, in situ SAXS/WAXD measurements revealed that the crystallization rate of PLLA increased with blending PBS and crystallization of PBS was almost restricted by blending PLLA although homo PBS was partially crystallized even by quenching from the molten phase due to quite rapid crystallization rate of PBS. These phenomena are due mainly to the molecular dispersed state of PLLA and PBS components formed in the molten state. The results obtained in this study are quite useful to control mechanical properties as well as the crystalline state including crystallinity and melting temperature, and crystal lattice, for PLLA/PBS blend.
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U2 - 10.1007/s10965-022-02986-8
DO - 10.1007/s10965-022-02986-8
M3 - Article
AN - SCOPUS:85126813924
VL - 29
JO - Journal of Polymer Research
JF - Journal of Polymer Research
SN - 1022-9760
IS - 4
M1 - 137
ER -