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Effect of allantoin on the stabilization efficiency of Ca–Zn thermal stabilizers for poly(vinyl chloride)

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Abstract

The influence of allantoin (ALL) combined with zinc stearate (ZnSt2), calcium stearate (CaSt2), and ZnSt2–CaSt2 (1:1), respectively, in different mass ratios on thermal stability of poly(vinyl chloride) (PVC) was investigated by Congo red test, discoloration test, and thermogravimetric analysis. The results indicated that ALL behaved as a good long-term thermal stabilizer for PVC, which was attributed to its ability to absorb hydrogen chloride released from the degradation of PVC. Moreover, ALL was able to extend the stabilization time of PVC containing ZnSt2–CaSt2 and postpone “zinc burning.” Fourier transform infrared spectra confirmed that ALL can react with ZnCl2 to produce an inert complex, which is responsible for postponing “zinc burning.”

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Acknowledgements

Financial support from the National Natural Science Foundation of China (Grant Nos: 21004052, 51173167) and the Opening Foundation of Zhejing Provincial Top Key Discipline (Grant No: G9713101008) are gratefully acknowledged.

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Authors and Affiliations

  1. College of Materials Science and Engineering, Zhejiang University of Technology, Hangzhou, 310014, People’s Republic of China

    Xiaopeng Xu, Si Chen, Bozhen Wu, Meng Ma, Yanqin Shi & Xu Wang

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  1. Xiaopeng Xu
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  2. Si Chen
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  3. Bozhen Wu
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  4. Meng Ma
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  5. Yanqin Shi
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Correspondence to Xu Wang.

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Xu, X., Chen, S., Wu, B. et al. Effect of allantoin on the stabilization efficiency of Ca–Zn thermal stabilizers for poly(vinyl chloride). J Therm Anal Calorim 119, 597–603 (2015). https://doi.org/10.1007/s10973-014-4168-6

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  • DOI: https://doi.org/10.1007/s10973-014-4168-6

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