Research progress on stereocomplex crystallization of poly(lactic acid) enantiomeric blends

YU Chengtao; HAN Lili; BAO Jianna; XIE Qing; SHAN Guorong; BAO Yongzhong; PAN Pengju

doi:10.11949/j.issn.0438-1157.20150695

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Research progress on stereocomplex crystallization of poly(lactic acid) enantiomeric blends

更新时间：2025-12-10

- Research progress on stereocomplex crystallization of poly(lactic acid) enantiomeric blends
- CIESC Journal Issue 2, Pages: 390-396(2016)
- 作者机构：
  
  浙江大学化学工程与生物工程学院, 化学工程联合国家重点实验室,浙江,杭州,310027
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20150695
  CLC： Q322
- Online First：05 February 2016，
  
  Published：05 February 2016
- 稿件说明：
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YU Chengtao, HAN Lili, BAO Jianna, et al. Research progress on stereocomplex crystallization of poly(lactic acid) enantiomeric blends[J]. CIESC Journal, 2016, (2): 390-396.
DOI：

YU Chengtao, HAN Lili, BAO Jianna, et al. Research progress on stereocomplex crystallization of poly(lactic acid) enantiomeric blends[J]. CIESC Journal, 2016, (2): 390-396. DOI： 10.11949/j.issn.0438-1157.20150695.

摘要

左旋聚乳酸(PLLA)和右旋聚乳酸(PDLA)在共混体系中可形成立构复合(sc)结晶

与聚乳酸(PLA)同质结晶材料相比

sc 结晶材料具有良好的耐热性和耐化学稳定性。因此

sc 结晶是改善PLA 综合性能的一种有效手段。但在PLLA/PDLA 共混体系中

存在各自的同质结晶与两者之间sc 结晶的竞争

所以制备高耐热sc 型PLA 材料的关键之一是理解其sc 结晶的形成条件与机理

进而调控和促进其sc 结晶程度。在PLLA/PDLA 共混物中

sc 结晶受聚合物化学结构、结晶与加工条件等诸多因素影响

其影响规律和机理较复杂。根据PLLA/PDLA共混物sc 结晶行为影响因素的不同

从聚合物分子量、立构规整性、共混比例、分子链拓扑结构、结晶方式与条件、加工助剂和其他组分加入6 个方面出发

详细综述了PLLA/PDLA 共混物sc 结晶及其sc 材料制备的研究进展

以期为高耐热生物基PLA 材料的加工制备提供指导。

Abstract

Poly(L-lactic acid) (PLLA) and poly(D-lactic acid) (PDLA) can form stereocomplex (sc) crystallites in their racemic blends. Compared to the homocrystalline poly(lactic acid) (PLA)

sc-type PLA has much better heat and chemical resistances. Therefore

sc crystallization of PLA has been an effective method to improve its physical properties. However

the formations of homo and sc crystallites are competing in the crystallization of PLLA/PDLA racemic blends. A critical issue to prepare the heat-resistant sc-type PLA is to understand the formation conditions and mechanism of sc crystallization

and further to control and promote the extent of sc crystallization. Sc crystallization is affected by a variety of factors such as the chemical structure of polymer component

crystallization and processing conditions in PLLA/PDLA racemic blends

and their influential mechanisms are very complicated. According to the various factors influencing sc crystallization

this paper will review the research progress of sc crystallization behavior and preparation of sc materials for PLLA/PDLA blends in recent years from the aspects of polymer molecular weight

stereoregularity

blend ratio

polymer topology

crystallization method and condition

and addition of additive or other components. It is expected that this review can provide a theoretical guideline for the preparation of heat-resistant biobased PLA materials.

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PAN Pengju

DU Miao

Related Institution

ZJU-Hangzhou Global Scientific and Technological Innovation Center

College of Chemical and Biological Engineering, Zhejiang University

Department of Polymer Science and Engineering, Zhejiang University

Institute of Zhejiang University-Quzhou

State Key Laboratory of Chemical Engineering, College of Chemical and Biological Engineering, Zhejiang University

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