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Synthesis and thermal properties of natural rubber grafted with poly(2-hydroxyethyl acrylate)

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Abstract

A novel modified natural rubber with grafted poly(2-hydroxyethyl acrylate) (NR-g-PHEA) was synthesized by emulsion polymerization in latex stage. Cumene hydroperoxide and tetraethylene pentamine were used as redox initiators (1:1 M ratio). The influences of reaction temperature, reaction time, initiator concentration and monomer concentration on percent grafting and grafting efficiency were investigated. Transmission electron microscopy was used to observe the NR-g-PHEA particles, which exhibited core-shell morphology. Chemical structure of purified NR-g-PHEA was confirmed by Fourier transform infrared spectroscopy and proton nuclear magnetic resonance spectroscopy. The thermal properties were examined by thermogravimetric analysis and by differential scanning calorimetry. The modified NR had improved thermal stability, and the NR-g-PHEA also presented slightly higher glass transition temperature than virgin NR.

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Acknowledgements

This research was financially supported by a grant from Prince of Songkla University, contract no. SIT570411S, by the government budget of Prince of Songkla University, contract no. SIT590171c, and by Prince of Songkla University, Surat Thani Campus, 2015. The authors would like to express their gratitude to the Faculty of Science and Industrial Technology, Prince of Songkla University, Surat Thani Campus, and to the Research and Development Office (RDO). We are grateful to Assoc. Prof. Dr. Seppo Karrila for his assistance with manuscript preparation.

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Authors and Affiliations

  1. Faculty of Science and Industrial Technology, Prince of Songkla University, Surat Thani Campus, Surat Thani, 84000, Thailand

    Wannarat Chueangchayaphan, Narong Chueangchayaphan, Suchanya Muangsap & Warisara Borapak

  2. Department of Materials Science and Technology, Faculty of Science, Prince of Songkla University, Songkhla, 90112, Thailand

    Varaporn Tanrattanakul

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  1. Wannarat Chueangchayaphan
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Correspondence to Wannarat Chueangchayaphan.

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Chueangchayaphan, W., Tanrattanakul, V., Chueangchayaphan, N. et al. Synthesis and thermal properties of natural rubber grafted with poly(2-hydroxyethyl acrylate). J Polym Res 24, 107 (2017). https://doi.org/10.1007/s10965-017-1269-5

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