Influence of Different Molecular Weights and Concentrations of Poly(glycidyl methacrylate) on Recycled Poly(ethylene ter
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ORIGINAL PAPER
Influence of Different Molecular Weights and Concentrations of Poly(glycidyl methacrylate) on Recycled Poly(ethylene terephthalate): A Thermal, Mechanical, and Rheological Study Chin‑Wen Chen1 · Ping‑Hui Liu1 · Fan‑Jie Lin1 · Chia‑Jung Cho1 · Li‑Yuan Wang1 · Hsu‑I. Mao1 · Yu‑Cheng Chiu2 · Shang‑Hung Chang3 · Syang‑Peng Rwei1 · Chi‑Ching Kuo1
© Springer Science+Business Media, LLC, part of Springer Nature 2020
Abstract Recycled poly(ethylene terephthalate) (r-PET) is a thermoplastic polyester. Repeated heat processing of r-PET may negatively affect physical properties due to thermal degradation. Therefore, to improve the physical properties of r-PET, poly(glycidyl methacrylate) (PGMA) samples with different molecular weights (low, medium, and high) were synthesized using atom transfer radical polymerization. The synthesized PGMA polymer was then subjected to 1H-NMR characterization and gel permeation chromatography for the analysis of molecular weight and its distribution. The intrinsic viscosity values of the r-PET/PGMA blend were increased from 0.61 to 0.8 dL g− 1 using high-molecular-weight PGMA at 2 wt%, and the glass transition temperature was increased from 71.8 °C for r-PET to 82.2 °C using high-molecular-weight PGMA at 1 wt%. Young’s modulus was increased by 1.1 times using 2 wt% high-molecular-weight PGMA compared with raw r-PET. All r-PET/PGMA blends samples exhibited notable shear thinning behavior and high viscosity compared with raw r-PET, and r-PET/PGMA blends are found with medium-molecular-weight PMGA polymers observing optimal physical properties. With these enhanced properties, the r-PET/PGMA blends can be applied in the recycling of PET, such as in eco-friendly yarn, packaging materials, and melt-brown non-woven fabric applications. Keywords Recycled polyethylene terephthalate · Poly(glycidyl methacrylate) · Molecular weight · Thermal property · Mechanical property Chin-Wen Chen, Ping-Hui Liu, and Fan-Jie Lin contributed equally to this work. Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10924-020-01800-0) contains supplementary material, which is available to authorized users. * Shang‑Hung Chang [email protected] * Chi‑Ching Kuo [email protected] 1
Institute of Organic and Polymeric Materials, Research and Development Center of Smart Textile Technology, National Taipei University of Technology, No. 1, Sec. 3, Chung‑Hsiao East Road, 10608 Taipei, Taiwan, ROC
2
Department of Chemical Engineering, National Taiwan University of Science and Technology, No. 43, Keelung Road, Section 4, 10607 Taipei, Taiwan, ROC
3
Division of Cardiology, Department of Internal Medicine, Chang Gung Memorial Hospital‑Linkou, Chang Gung University College of Medicine, Taoyuan, Taiwan, ROC
Introduction Environmental pollution from plastic waste has received tremendous attention in recent years, especially that from poly(ethylene terephthalate) (PET), which exhibits excellent impact strength, transparency, thermal stability, and
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