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Crystallization and Mechanical Properties of Recycled Poly(ethylene terephthalate) Toughened by Styrene–Ethylene/Butylenes–Styrene Elastomer

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Abstract

Recycled poly(ethylene terephthalate) (R-PET) was blended with 15–30 wt% of styrene–ethylene/butylenes–styrene (SEBS) block copolymer and maleic anhydride grafted SEBS (SEBS-g-MA). Effects of nucleation and toughening of the elastomers were evaluated systematically by study of morphology, crystallization, thermal and mechanical properties of the blend. The addition of 30 wt% SEBS promoted the formation of co-continuous structure of the blend and caused the fracture mechanism to change from strain softening to strain hardening. Addition of SEBS-g-MA resulted in significant modification of phase morphology and obviously improved the impact strength. The compatibilization reaction of PET with SEBS-g-MA accelerated the crystallization of PET and increased the crystallinity. The shifts in glass transition temperature of PET towards that of SEBS-g-MA and the higher modulus for R-PET/SEBS-g-MA (70/30) blend found by DMA are also indications of better interactions under the conditions of compatibilization and interpenetrating structure.

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Acknowledgments

Thanks for the financial assistance of National Natural Science Foundation of China (20574019).

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Authors and Affiliations

  1. School of Materials Science and Engineering, East China University of Science and Technology, 130 Meilong Road, 200237, Shanghai, China

    Yue Zhang, Hongsheng Zhang, Luping Ni, Qilin Zhou, Weihong Guo & Chifei Wu

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  1. Yue Zhang
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  2. Hongsheng Zhang
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  3. Luping Ni
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  4. Qilin Zhou
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  5. Weihong Guo
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  6. Chifei Wu
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Correspondence to Chifei Wu.

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Zhang, Y., Zhang, H., Ni, L. et al. Crystallization and Mechanical Properties of Recycled Poly(ethylene terephthalate) Toughened by Styrene–Ethylene/Butylenes–Styrene Elastomer. J Polym Environ 18, 647–653 (2010). https://doi.org/10.1007/s10924-010-0223-y

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  • DOI: https://doi.org/10.1007/s10924-010-0223-y

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