Recent Advances in Processing of Stereocomplex‐Type Polylactide,Macromolecular Rapid Communications

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Recent Advances in Processing of Stereocomplex‐Type Polylactide
Macromolecular Rapid Communications ( IF 4.2 ) Pub Date : 2017-09-12 , DOI: 10.1002/marc.201700454
Hongwei Bai ₁ , Shihao Deng ₁ , Dongyu Bai ₁ , Qin Zhang ₁ , Qiang Fu ₁

Affiliation

Over the past two decades, biomass‐derived and biodegradable polylactide (PLA) has sparked tremendous attention as a sustainable alternative to traditional petroleum‐derived polymers for diverse applications. Unfortunately, the current applications of PLA have been mainly limited to biomedical and commodity fields, mostly because the poor heat resistance (resulting from low melting temperature) and hydrolysis stability make it hard to use as an engineering plastic. Stereocomplexation between enantiomeric poly(l‐lactide) (PLLA) and poly(d‐lactide) (PDLA) opens a new avenue toward PLA‐based engineering plastics with improved properties. The formation, crystal structure, properties, and potential applications of stereocomplex‐type PLA (SC‐PLA) are summarized by some research groups. However, since it is challenging to achieve full stereocomplexation from high‐molecular‐weight PLLA/PDLA blends and to avoid serious thermal degradation of the PLAs after complete melting, the advances and progress in the processing of SC‐PLA into useful products are quite rare in open publication. In this review, some important strategies for enhancing stereocomplex crystallization in practical processing operations are presented and recently developed processing technologies for SC‐PLA are highlighted, such as low‐temperature sintering. Furthermore, major challenges and future developments are briefly discussed. This review is expected to potentially open up new research activities in the processing of SC‐PLA.

中文翻译：

立体复合型聚丙交酯的加工最新进展

在过去的二十年中，生物质衍生的可生物降解的聚丙交酯（PLA）作为传统石油衍生的聚合物在各种应用中的可持续替代品，引起了极大的关注。不幸的是，PLA的当前应用主要限于生物医学和商品领域，主要是因为耐热性差（由于较低的熔化温度）和水解稳定性使它很难用作工程塑料。对映体聚（l-丙交酯）（PLLA）和聚（d丙交酯（PDLA）为性能提高的PLA基工程塑料开辟了一条新途径。一些研究小组总结了立体络合物型PLA（SC-PLA）的形成，晶体结构，性质和潜在应用。但是，由于要从高分子量PLLA / PDLA共混物中实现完全的立体配合，并避免在完全熔融后避免PLA的严重热降解具有挑战性，将SC-PLA加工成有用产品的进步和进展非常罕见在公开出版物中。在这篇综述中，提出了一些在实际加工操作中增强立体复合物结晶的重要策略，并着重介绍了最近开发的SC‐PLA加工技术，例如低温烧结。此外，简要讨论了主要挑战和未来发展。预期该审查可能会在SC‐PLA的处理中开启新的研究活动。

更新日期：2017-09-12

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