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Observation of phase separation of epoxidized trans-1,4-polyisoprene and mechanism exploration through 13C-NMR

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Abstract

Selectively epoxidized trans-1,4-polyisoprene (SETPI) and randomly epoxidized trans-1,4-polyisoprene (RETPI) were fabricated successfully through modified surface water-phase suspension epoxidation and solution random epoxidation, respectively. The effects of fabricated method and epoxy degree of ETPI on the glass transition temperature (T g), dynamic mechanical properties and phase separation phenomenon of the as-fabricated polymer have been investigated by different scanning calorimetry, dynamic mechanical analyzer and phase contrast microscope. The double bonds and epoxy groups sequence structure distribution of different ETPI have been observed and analyzed by 13C-NMR. There is a great deal of difference in the microstructure and sequence distribution of epoxy group in ETPI with different synthesis methods and epoxy degree. The results show that distribution of epoxy group in SETPI is nonuniform which brings about the phase separation.

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Acknowledgments

Appreciation is expressed to NSFC No. 51273100, Natural Science Fund for Distinguished Young Scholars of Shandong Province (JQ201213).

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Authors and Affiliations

  1. Key Laboratory of Rubber-Plastics, Ministry of Education/Shandong Provincial Key Laboratory of Rubber-plastics, Qingdao University of Science and Technology, Qingdao, Shandong, China

    Huafeng Shao, Caixia Wang, Peng Xiao, Wei Yao, Aihua He & Baochen Huang

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  1. Huafeng Shao
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  2. Caixia Wang
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  3. Peng Xiao
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  4. Wei Yao
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  5. Aihua He
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  6. Baochen Huang
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Correspondence to Huafeng Shao, Wei Yao or Aihua He.

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Shao, H., Wang, C., Xiao, P. et al. Observation of phase separation of epoxidized trans-1,4-polyisoprene and mechanism exploration through 13C-NMR. Polym. Bull. 70, 2211–2221 (2013). https://doi.org/10.1007/s00289-013-0939-7

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  • DOI: https://doi.org/10.1007/s00289-013-0939-7

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