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Structure and Thermal Properties of Polyurethanes Synthesized from Cardanol Diol

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Abstract

Amorphous polyurethanes (PUs) were prepared from isophorone diisocyanate and various diols based on ethylene glycol, containing phenol (PD), hydrogenated cardanol (HCD) and cardanol (CD) as side groups. The influence of side groups on thermal and thermo-oxidative stability was studied by thermogravimetric analysis and differential scanning calorimetry. The finding revealed that pendent C15 alkyl side groups of HCD–PU and CD–PU improved thermal stability of PUs. The possible crosslinks of olefinic side groups enhanced both thermal and thermo-oxidative stability of CD–PU. Both EG–PU and CD–PU exhibited good oxidative resistance. The glass transition temperature arranged in the order of EG–PU > PD–PU > HCD–PU > CD–PU. Cardanol molecules on PU backbones acted as an internal plasticizer and elevated the flexibility of PUs.

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Acknowledgments

The authors thank the Development Fund (64/2553) from Faculty of Engineering, Burapha University for financial support. SW would like to acknowledge Department of chemistry, Faculty of Science, Mahidol University. We also thank Dr. Jaray Jaratjaroonphong for his help and generous contributions of some laboratory equipment.

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Authors and Affiliations

  1. Materials Science and Engineering Program, Faculty of Science, Mahidol University, Bangkok, 10400, Thailand

    Wissawat Sakulsaknimitr

  2. Department of Chemistry, Faculty of Science, Mahidol University, Bangkok, 10400, Thailand

    Supa Wirasate

  3. Department of Industrial Engineering, Faculty of Engineering, Burapha University, Chonburi, 20131, Thailand

    Kasem Pipatpanyanugoon

  4. Department of Chemistry, Faculty of Science, Burapha University, Chonburi, 20131, Thailand

    Pornpen Atorngitjawat

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  1. Wissawat Sakulsaknimitr
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  2. Supa Wirasate
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  3. Kasem Pipatpanyanugoon
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  4. Pornpen Atorngitjawat
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Correspondence to Pornpen Atorngitjawat.

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Sakulsaknimitr, W., Wirasate, S., Pipatpanyanugoon, K. et al. Structure and Thermal Properties of Polyurethanes Synthesized from Cardanol Diol. J Polym Environ 23, 216–226 (2015). https://doi.org/10.1007/s10924-014-0707-2

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  • DOI: https://doi.org/10.1007/s10924-014-0707-2

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