Open Access

ARTICLE

Synthesis and Characterization of Thermoplastic Poly(Ester Amide)s Elastomer (TPEaE) Obtained from Recycled PET

Zhi-Yu Yang, Yi-Ling Chou, Hao-Chun Yang, Chin-Wen Chen^*, Syang-Peng Rwei^*

Institute of Organic and Polymeric Materials, Research and Development Center of Smart Textile Technology, National Taipei University of Technology, Taipei, 10608, Taiwan

* Corresponding Authors: Chin-Wen Chen. Email: ; Syang-Peng Rwei. Email:

(This article belongs to this Special Issue: Plastic waste management towards a sustainable future)

Journal of Renewable Materials 2021, 9(5), 867-880. https://doi.org/10.32604/jrm.2021.014476

Received 30 September 2020; Accepted 09 November 2020; Issue published 20 February 2021

Abstract

A series of thermoplastic polyester elastomer (TPEE) and thermoplastic poly(ester amide)s elastomer (TPEaE) copolymers were obtained by depolymerizing PET (polyethylene terephthalate) by which the waste PET can be efficiently recovered and recycled into value-added products from a practical and economical point of view. The structure of TPEE and TPEaE was identified using nuclear magnetic resonance (NMR) and Fourier transform infrared spectroscopy (FT-IR). Differential scanning calorimetry (DSC) data showed that the melting temperature (T_m) decreased with the amide content increased. The glass transition temperature (T_g) was increased as introducing the amide group, and the formation of amide-ester and amide-amide hydrogen bonds increased the intermolecular chain force. The intrinsic viscosity (η) showed the tendency of increment from TPEE (0.53 dL g⁻¹ ) to TPEaE-5% (0.72 dL g⁻¹ ) due to the reinforcement of hydrogen bond and chain entanglement.

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