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立体复合聚乳酸颗粒对高分子量聚乳酸共混物立体复合的影响。

The Effect of Stereocomplex Polylactide Particles on the Stereocomplexation of High Molecular Weight Polylactide Blends.

作者信息

Samsuri Muhammad, Iswaldi Ihsan, Purnama Purba

机构信息

Chemical Engineering Department, Universitas Bhayangkara Jakarta Raya, Bekasi 17121, West Java, Indonesia.

School of Applied STEM, Universitas Prasetiya Mulya, Tangerang 15339, Banten, Indonesia.

出版信息

Polymers (Basel). 2021 Jun 21;13(12):2018. doi: 10.3390/polym13122018.

DOI:10.3390/polym13122018
PMID:34205488
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8234893/
Abstract

Stereocomplexation is one of several approaches for improving polylactide (PLA) properties. The high molecular weight of poly L-lactide (PLLA) and poly D-lactide (PDLA) homopolymers are a constraint during the formation of stereocomplex PLAs (s-PLAs). The presence of s-PLA particles in PLA PLLA/PDLA blends can initiate the formation of s-PLA crystalline structures. We used the solution casting method to study the utilization of s-PLA materials from high molecular weight PLLA/PDLA blends for increasing s-PLA formation. The s-PLA particles initiated the formation of high molecular weight PLLA/PDLA blends, obtaining 49.13% s-PLA and 44.34% of the total crystalline fraction. In addition, the mechanical properties were enhanced through s-PLA crystalline formation and the increasing of total crystallinity of the PLLA/PDLA blends. The s-PLA particles supported initiation for s-PLA formation and acted as a nucleating agent for PLA homopolymers. These unique characteristics of s-PLA particles show potential to overcome the molecular weight limitation for stereocomplexation of PLLA/PDLA blends.

摘要

立体复合是改善聚乳酸（PLA）性能的几种方法之一。聚L-乳酸（PLLA）和聚D-乳酸（PDLA）均聚物的高分子量是立体复合聚乳酸（s-PLA）形成过程中的一个限制因素。PLA PLLA/PDLA共混物中s-PLA颗粒的存在可以引发s-PLA晶体结构的形成。我们采用溶液浇铸法研究了高分子量PLLA/PDLA共混物中s-PLA材料的利用情况，以增加s-PLA的形成。s-PLA颗粒引发了高分子量PLLA/PDLA共混物的形成，获得了49.13%的s-PLA和44.34%的总结晶分数。此外，通过s-PLA晶体的形成和PLLA/PDLA共混物总结晶度的增加，机械性能得到了增强。s-PLA颗粒支持s-PLA的形成引发，并作为PLA均聚物的成核剂。s-PLA颗粒的这些独特特性显示出克服PLLA/PDLA共混物立体复合分子量限制的潜力。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0c9c/8234893/4be52994b8f7/polymers-13-02018-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0c9c/8234893/fb4bf427c4bf/polymers-13-02018-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0c9c/8234893/91655bfca1b7/polymers-13-02018-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0c9c/8234893/4be52994b8f7/polymers-13-02018-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0c9c/8234893/fb4bf427c4bf/polymers-13-02018-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0c9c/8234893/91655bfca1b7/polymers-13-02018-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0c9c/8234893/4be52994b8f7/polymers-13-02018-g003.jpg

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