Crystal Modifications and Thermal Behavior of Poly(l -lactic acid) Revealed by Infrared Spectroscopy
Jianming Zhang
1
,
Yongxin Duan
1
,
HARUMI SATO
1
,
Hideto Tsuji
1
,
Isao Noda
1
,
Shouke Yan
1
,
Y. Ozaki
1
1
Department of Chemistry, School of Science and Technology, and Research Center for Environment Friendly Polymers, Kwansei-Gakuin University, Gakuen, Sanda 669-1337, Japan; Department of Ecological Engineering, Faculty of Engineering, Toyohashi University of Technology, Tempaku-cho, Toyohashi, Aichi 441-8580, Japan; State Key Laboratory of Polymer Physics & Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, P. R. China; and The Procter & Gamble Company, 8611 Beckett Road, West...
|
Publication type: Journal Article
Publication date: 2005-08-20
scimago Q1
wos Q1
SJR: 1.352
CiteScore: 9.0
Impact factor: 5.2
ISSN: 00249297, 15205835
Materials Chemistry
Organic Chemistry
Inorganic Chemistry
Polymers and Plastics
Abstract
Recently, we reported the isothermal crystallization behaviors of poly(l-lactic acid) (PLLA) from the melt and glassy states, respectively [J. Phys. Chem. B 2004, 108, 11514; Macromolecules 2004, 37, 6433]. Surprisingly, the quite different infrared (IR) spectral evolutions occur in the two crystallization processes at different temperatures in which the same crystal modification is expected to be formed. To clarify this unusual phenomenon, the crystal modifications and thermal behavior of PLLA samples prepared under different crystallization temperatures are investigated in detail by TEM, WAXD, and FTIR techniques. On the basis of the WAXD and IR data, a new crystal modification named the α form is proposed for the crystal structure of PLLA samples annealed at temperature below 120 °C. Such crystal modification with loose 103 helical chain packing is less thermally stable than the standard α form of PLLA. This assignment can explain all the experiment observations well. Other possible mechanisms for the ...
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Zhang J. et al. Crystal Modifications and Thermal Behavior of Poly(l-lactic acid) Revealed by Infrared Spectroscopy // Macromolecules. 2005. Vol. 38. No. 19. pp. 8012-8021.
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Zhang J., Duan Y., SATO H., Tsuji H., Noda I., Yan S., Ozaki Y. Crystal Modifications and Thermal Behavior of Poly(l-lactic acid) Revealed by Infrared Spectroscopy // Macromolecules. 2005. Vol. 38. No. 19. pp. 8012-8021.
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TY - JOUR
DO - 10.1021/ma051232r
UR - https://doi.org/10.1021/ma051232r
TI - Crystal Modifications and Thermal Behavior of Poly(l-lactic acid) Revealed by Infrared Spectroscopy
T2 - Macromolecules
AU - Zhang, Jianming
AU - Duan, Yongxin
AU - SATO, HARUMI
AU - Tsuji, Hideto
AU - Noda, Isao
AU - Yan, Shouke
AU - Ozaki, Y.
PY - 2005
DA - 2005/08/20
PB - American Chemical Society (ACS)
SP - 8012-8021
IS - 19
VL - 38
SN - 0024-9297
SN - 1520-5835
ER -
Cite this
BibTex (up to 50 authors)
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@article{2005_Zhang,
author = {Jianming Zhang and Yongxin Duan and HARUMI SATO and Hideto Tsuji and Isao Noda and Shouke Yan and Y. Ozaki},
title = {Crystal Modifications and Thermal Behavior of Poly(l-lactic acid) Revealed by Infrared Spectroscopy},
journal = {Macromolecules},
year = {2005},
volume = {38},
publisher = {American Chemical Society (ACS)},
month = {aug},
url = {https://doi.org/10.1021/ma051232r},
number = {19},
pages = {8012--8021},
doi = {10.1021/ma051232r}
}
Cite this
MLA
Copy
Zhang, Jianming, et al. “Crystal Modifications and Thermal Behavior of Poly(l-lactic acid) Revealed by Infrared Spectroscopy.” Macromolecules, vol. 38, no. 19, Aug. 2005, pp. 8012-8021. https://doi.org/10.1021/ma051232r.