Synergistic effects of PEG middle-blocks and talcum on crystallizability and thermomechanical properties of flexible PLLA-<i>b</i>-PEG-<i>b</i>-PLLA bioplastic-Reference-Cited by-同舟云学术

Synergistic effects of PEG middle-blocks and talcum on crystallizability and thermomechanical properties of flexible PLLA-b-PEG-b-PLLA bioplastic

Published:2022-01-01 Issue:1 Volume:22 Page:389-398
ISSN:1618-7229
Container-title:e-Polymers
language:en
Short-container-title:

Author:

Srisuwan Yaowalak¹,Baimark Yodthong¹

Affiliation:

1. Department of Chemistry and Centre of Excellence for Innovation in Chemistry, Biodegradable Polymers Research Unit, Faculty of Science, Mahasarakham University , Mahasarakham 44150 , Thailand

Abstract

Abstract In this study, talcum was melt-blended with a flexible poly(l-lactide)-b-polyethylene glycol-b-poly(l-lactide) triblock copolymer (PLLA-PEG-PLLA) with 1, 2, 4, and 8 wt% talcum, for improvement of the crystallization and thermomechanical properties of PLLA-PEG-PLLA compared with PLLA. The crystallizability of PLLA-PEG-PLLA/talcum composites was better than that of PLLA/talcum composites as determined from differential scanning calorimetry. X-ray diffractometry showed that the PLLA-PEG-PLLA/talcum films had a higher degree of crystallinity than the PLLA/talcum films. PEG middle-blocks and talcum showed a synergistic effect for crystallization of PLLA end-blocks. The PLLA-PEG-PLLA/talcum films showed better thermomechanical properties than those of the PLLA/talcum films as determined from dynamic mechanical analysis. This was confirmed from the results of dimensional stability to heat. In summary, the PLLA-PEG-PLLA/talcum composites have potential for use as flexible bioplastics with good dimensional stability to heat.

Publisher

Walter de Gruyter GmbH

Subject

Polymers and Plastics,Physical and Theoretical Chemistry,General Chemical Engineering

Link

https://www.degruyter.com/document/doi/10.1515/epoly-2022-0040/pdf

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