Assessing compatibility, tansesterification, and disintegration of PET/PLA fiber blend in composting conditions

Frontiers in Materials

Materials

Hsossein Nazockdast¹  Maryam Kheirandish²  Mohammad Reza Mohaddes Mojtahedi² 

[1] Department of Polymer Engineering, Amirkabir University of Technology, Tehran, Iran;Department of Textile Engineering, Amirkabir University of Technology, Tehran, Iran;

关键词: poly (ethylene terephthalate);    poly (lactic acid);    melt-spinning;    blend fiber;    transesterification;    disintegration;   

DOI  :  10.3389/fmats.2023.1225200

 received in 2023-05-18, accepted in 2023-09-18,  发布年份 2023

来源: Frontiers

【 摘 要 】

To recycle a blend of PET and PLA, understanding the challenging issues and crucial parameters that affect the properties and morphology of the blend is key to successful recycling. So, the main focus of this study was to investigate the parameters that influence the processability, compatibility, morphology, properties, and disintegration of PET/PLA blend fibers. Using surface tension measurements, acceptable adhesion between the two components was observed. SEM results showed that the PET/PLA blend fibers have a microfibrillar morphology. Based on 1H NMR analysis, the exchange reaction resulted in a block copolymer. The crystallization process in the fibers became more difficult as the PLA content increased due to the formation of copolymers through transesterification. The presence of oriented crystals in the melt-spun fiber blend was confirmed by X-ray diffraction patterns. As the PLA content increased, the tensile strength of the blends decreased gradually. Furthermore, the sample containing 20 wt% PLA exhibited the highest dimensional stability. The disintegration process in composting conditions for PET was improved by PLA.

【 授权许可】

Unknown   
Copyright © 2023 Kheirandish, Mohaddes Mojtahedi and Nazockdast.