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Toughening modification on self-reinforced composite of the rPET fibers/rPETG

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Abstract

In this work, self-reinforced composite of recycled polyester (rPET) fibers/recycled poly (ethylene terephthalateco-1,4-cylclohexy-lenedimethylene terephthalate) (rPETG) was prepared by internal mixing and molding press, in which rPET fibers were modified according to the previous method. The effects of compatibilizers including polyethylene-octene grafting glycidyl methacrylate (POE-g-GMA) and ethylene vinyl acetate grafting maleic anhydride (EVA-g-MAH) on the toughness of the composites were studied, respectively. The results showed that POE-g-GMA had better toughening effect on composite than EVA-g-MAH, the POE-g-GMA not only increased the toughness of rPET fibers/rPETG composite but also maintained the strength of composite at a high level. The impact strength of modified rPET fibers/POE-g-GMA/rPETG composite was found to increase by 910%. And, the bending strength and tensile strength were improved by 34.7% and 22.2%, respectively. DSC and SEM results indicated that with an increase in POE-g-GMA content, the degree of crystallinity of rPET fibers/POE-g-GMA/rPETG decreased, bonding between the fibers and matrix became tight, which improved the stress transfer ability between the matrix and the fibers.

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  1. Polymer Processing Laboratory, School of Material Science and Engineering, East China University of Science and Technology, Shanghai, 200237, China

    Wei Jiang, Qiuying Li & Chifei Wu

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  1. Wei Jiang
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  2. Qiuying Li
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Correspondence to Qiuying Li or Chifei Wu.

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Jiang, W., Li, Q. & Wu, C. Toughening modification on self-reinforced composite of the rPET fibers/rPETG. Polym. Bull. 81, 5909–5924 (2024). https://doi.org/10.1007/s00289-023-04982-4

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  • DOI: https://doi.org/10.1007/s00289-023-04982-4

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