Effect of citric acid on thermal, phase morphological, and mechanical properties of poly(l-lactide)-<i>b</i>-poly(ethylene glycol)-<i>b</i>-poly(l-lactide)/thermoplastic starch blends-Reference-Cited by-同舟云学术

Effect of citric acid on thermal, phase morphological, and mechanical properties of poly(l-lactide)-b-poly(ethylene glycol)-b-poly(l-lactide)/thermoplastic starch blends

Published:2023-01-01 Issue:1 Volume:23 Page:
ISSN:1618-7229
Container-title:e-Polymers
language:en
Short-container-title:

Author:

Srisuwan Yaowalak¹,Srihanam Prasong¹,Phromsopha Theeraphol¹,Baimark Yodthong¹

Affiliation:

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

Abstract

Abstract This work investigated the thermal, morphological, and tensile properties of poly(l-lactide)-b-poly(ethylene glycol)-b-poly(l-lactide) (PLLA-PEG-PLLA)/thermoplastic starch (TPS) blends with 3 wt% citric acid (CA) treatment of TPS. The blends with PLLA-PEG-PLLA/CA-TPS ratios of 100/0, 90/10, 80/20, and 60/40 (w/w) were investigated and compared with PLLA-PEG-PLLA/CA-free TPS blends. Crystallizability of the blends decreased and thermal stability increased as the TPS content increased. The thermal stability of the blends was found to improve after CA treatment of TPS. The PLLA-PEG-PLLA/CA-TPS blends showed better phase compatibility than those of the PLLA-PEG-PLLA/CA-free TPS blends. The tensile properties of the blends were improved by CA treatment of TPS. In conclusion, improvement in thermal stability, phase compatibility, and tensile properties of the PLLA-PEG-PLLA/TPS blends was obtained by CA treatment of TPS. The resulting PLLA-PEG-PLLA/CA-TPS blends could potentially be used to prepare biodegradable and flexible bioplastics.

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-2023-0057/pdf

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