Publication:
Effect of thermal annealing on crystal evolution and multiple melting behaviors of molded poly(L-lactic acid) and poly(butylene succinate) blends upon heating investigated by TMDSC

2

Issued Date

2021-12-01

Resource Type

Article

ISSN

15882926
13886150

DOI

10.1007/s10973-021-10629-1

Other identifier(s)

2-s2.0-85101487837

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Mahidol University

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SCOPUS

Bibliographic Citation

Journal of Thermal Analysis and Calorimetry. Vol.146, No.6 (2021), 2471-2480

Suggested Citation

Todsapol Kajornprai, Kalyanee Sirisinha Effect of thermal annealing on crystal evolution and multiple melting behaviors of molded poly(L-lactic acid) and poly(butylene succinate) blends upon heating investigated by TMDSC. Journal of Thermal Analysis and Calorimetry. Vol.146, No.6 (2021), 2471-2480. doi:10.1007/s10973-021-10629-1 Retrieved from: https://repository.li.mahidol.ac.th/handle/123456789/76575

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Title

Effect of thermal annealing on crystal evolution and multiple melting behaviors of molded poly(L-lactic acid) and poly(butylene succinate) blends upon heating investigated by TMDSC

Author(s)

Todsapol Kajornprai
 Kalyanee Sirisinha

Other Contributor(s)

Mahidol University

Abstract

The influence of post-process annealing treatment on the structural and thermal behaviors of poly(L-lactic acid)/poly(butylene succinate) (PLLA/PBS) blend was investigated by temperature modulated differential scanning calorimetry (TMDSC) and wide-angle X-ray diffractometry. It is shown that the low-order α′-structure of PLLA was formed in the as-molded samples and the molded products annealed at the temperatures below the melting of PBS, whereas the high-order α-crystal was developed when the high temperature of annealing (152 °C) was applied. With the addition of poly(ethylene glycol) plasticizer to the blends, the formation of high-order α-structure was prohibited. During the DSC heating scan, the α′- to α-crystalline phase transformation did not occur. The evidence of multiple melting behaviors observed by TMDSC was ascribed to the simultaneous melting, recrystallization, and remelting of the PLLA and PBS crystals in the blends.

Keyword(s)

Chemistry
 Physics and Astronomy

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https://repository.li.mahidol.ac.th/handle/123456789/76575

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Scopus 2021