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Polymer Bulletin
Published in: Polymer Bulletin 7/2019

01-10-2018 | Original Paper

Rapid preparation and continuous processing of polylactide stereocomplex crystallite below its melting point

Authors: Xin-Rui Gao, Ben Niu, Wen-Qiang Hua, Yue Li, Ling Xu, Yan Wang, Xu Ji, Gan-Ji Zhong, Zhong-Ming Li

Published in: Polymer Bulletin | Issue 7/2019

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Abstract

Herein, a feasible protocol for the rapid preparation of polylactide (PLA) stereocomplex (SC) crystallite by extrusion was shown, in which a processing temperature lower than its melting point was chosen to suppress the thermal degradation and homocrystallization of PLA. Meanwhile, flexible and biodegradable poly(butylene adipate-co-terephthalate) (PBAT) was introduced to improve the processability of solid SC crystallite. The exclusive formation of SC crystallite with high crystallinity (~ 50 to 60%) was realized without further thermal treatment, which was clearly confirmed by wide-angle X-ray diffraction and different scanning calorimeter tests. It was found that certain amount of PBAT actually facilitates the stereocomplexation process, rendering the extrusion much smooth with 30 wt% more PBAT, thus making it promising to industrially achieve SC crystallite. Furthermore, the as-prepared PBAT/SC blend could be processed easily at a relatively low temperature, desirably allowing its scalable application. This work delivers a facile method for the efficient preparation and wider application of SC crystallite, which could be of great value to fabricate nucleating agents or heat-resistant PLA parts.
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Appendix
Available only for authorised users
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Metadata
Title
Rapid preparation and continuous processing of polylactide stereocomplex crystallite below its melting point
Authors
Xin-Rui Gao
Ben Niu
Wen-Qiang Hua
Yue Li
Ling Xu
Yan Wang
Xu Ji
Gan-Ji Zhong
Zhong-Ming Li
Publication date
01-10-2018
Publisher
Springer Berlin Heidelberg
Published in
Polymer Bulletin / Issue 7/2019
Print ISSN: 0170-0839
Electronic ISSN: 1436-2449
DOI
https://doi.org/10.1007/s00289-018-2544-2

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