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Enhanced crystallization behaviors of poly(ethylene terephthalate) via adding expanded graphite and poly(ethylene glycol)

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Abstract

A compound additive system consisting of expanded graphite (EG) and poly(ethylene glycol) (PEG) was designed to enhance the crystallization of poly(ethylene terephthalate) (PET). In this additive system, EG acted as a heterogeneous nucleating agent to reduce energy barrier for nucleation, while PEG played as plasticizer to improve mobility of PET chains. Simultaneously adding EG and PEG resulted in faster crystallization kinetics than the cases of solely adding EG or PEG in both of non-isothermal and isothermal crystallization processes, indicating a synergistic effect of EG and PEG on enhancing PET crystallization. However, for non-isothermal crystallization process, in which crystallization occurred from a cooling melt, EG played a dominant role. As to isothermal crystallization process where crystallization took place in a super-cooling state, PEG seemed to be more important. Moreover, the chain conformation change among the semi-crystalline PET specimens was ascertained by Fourier transform infrared spectroscopy.

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Acknowledgments

We would like to express our sincere thanks to the National Natural Science Foundation of China for financial support (21074075, 50903048, 51121001).

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Authors and Affiliations

  1. College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, People’s Republic of China

    Juan-juan Su, Guang-hui Yang, Tian-nan Zhou, Xiang Gao, Ke Wang & Qiang Fu

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  1. Juan-juan Su
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  2. Guang-hui Yang
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  3. Tian-nan Zhou
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  4. Xiang Gao
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  5. Ke Wang
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  6. Qiang Fu
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Correspondence to Qiang Fu.

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Su, Jj., Yang, Gh., Zhou, Tn. et al. Enhanced crystallization behaviors of poly(ethylene terephthalate) via adding expanded graphite and poly(ethylene glycol). Colloid Polym Sci 291, 911–917 (2013). https://doi.org/10.1007/s00396-012-2809-5

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  • DOI: https://doi.org/10.1007/s00396-012-2809-5

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