期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 233, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.ijbiomac.2023.123581
关键词
Polylactic acid (PLA); Organic nucleating agent; Crystallization behavior; Mechanical properties; Heat resistance
In this review, the relationship between PLA crystallization and its molecular structure and processing conditions is summarized. The research progress of organic nucleating agents on the crystallization behavior of PLA is introduced, and the nucleation mechanism of PLA is expounded. The effects of the crystallization behavior of PLA on its mechanical properties and heat resistance are discussed.
Polylactic acid (PLA) has attracted much attention because of its good biocompatibility, biodegradability, and mechanical properties. However, the slow crystallization rate of PLA during molding leads to its poor heat resistance, which limit its diffusion for many industrial applications. In this review, the relationship between PLA crystallization and its molecular structure and processing conditions is summarized. From the perspective of the regulation of PLA crystallization by organic nucleating agents, the research progress of organic micromolecule (e. g., esters, amides, and hydrazides), organic salt, supramolecular, and macromolecule nucleating agents on the crystallization behavior of PLA is mainly introduced. The nucleation mechanism of PLA is expounded by organic nucleating agents, and the effect of the interaction force between organic nucleating agents and PLA molecular chains on the crystallization behavior of PLA is analyzed. The effects of the crystallization behavior of PLA on its mechanical properties and heat resistance are discussed. It will provide a theoretical reference for the devel-opment and application of high-efficiency nucleating agents.
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