Research Progress on Heat Resistant Modification of Polylactic Acid

CHEN Zhong-bi, GUO Sheng, ZHANG Xiu-gang, YU Sen-long, XIANG Heng-xue, ZHOU Zhe, ZHU Mei-fang

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Plastics Science and Technology ›› 2024, Vol. 52 ›› Issue (06) : 138-143. DOI: 10.15925/j.cnki.issn1005-3360.2024.06.026
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Research Progress on Heat Resistant Modification of Polylactic Acid

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Abstract

Polylactic acid (PLA) is a biodegradable material with good degradability, mechanical properties and processing properties. However, PLA still has some problems such as poor heat resistance, which limits its application and development in the fields with high heat resistance requirements. Heat resistant modification of PLA has become a hot topic in academia and industry. In this paper, the thermal deformation process and modification mechanism of PLA were introduced, and the research progress of thermal modification of PLA was systematically described, including physical blending modification, processing field control, nucleation crystallization optimization, chemical long chain branching and other methods. The current research status of improving thermal resistance of PLA through nucleation crystallization optimization was emphatically discussed, and the advantages and disadvantages of different thermal modification methods were summarized. According to the properties of PLA material and its needs in actual use, it is predicted that its future development direction will focus on high efficiency and environmental protection, long-term stability, composite function and so on.

Key words

Polylactic acid / Heat resistance / Physical blending / Crystal structure / Long chain branching

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CHEN Zhong-bi , GUO Sheng , ZHANG Xiu-gang , et al . Research Progress on Heat Resistant Modification of Polylactic Acid. Plastics Science and Technology. 2024, 52(06): 138-143 https://doi.org/10.15925/j.cnki.issn1005-3360.2024.06.026

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