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A New Unsaturated Poly(ester-urethane) Based on Terephthalic Acid Derived from Polyethylene Terephthalate (PET) of Waste Bottles

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Abstract

The new unsaturated poly(ester-urethane) was synthesized by the reaction of 4,4′-methylenediphenyldiisocyanate with 4,4′-di(2,3-butenhydroxyl) terephthalate in the ratio of 1:1. 4,4′-di(2,3-butenhydroxyl) terephthalate was first prepared by reacting 2 mol of cis-2-butene-1, 4-diol with 1 mol of terephthalic acid. The terephthalic acid used was derived from the recycling of PET bottles via subjection to saponification process. The synthesized compounds were characterized by CHN analysis, FT-IR, 1H NMR and UV–Vis spectroscopy, with consistency of results showing the presence of the new unsaturated poly(ester-urethane) II. Thermal properties of the new polymer was verified by differential scanning calorimetry and thermogravimetric analysis, whereas the mechanical properties were characterized by tensile, elongation, hardness, adhesion and impact testing. The electrical conductivity and the electrical resistance of the compound were observed with increasing applied voltage.

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Acknowledgments

The authors would like to acknowledge University Sains Malaysia for short term grant No. 304/PTEKIND/6311031. The authors would like to thank Dr. Shahrom Mahmud for his assistance in measuring the conductivity.

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Authors and Affiliations

  1. School of Industrial Technology, University Science Malaysia, 11800, Penang, Malaysia

    A. M. Issam, Sufia Hena & A. K. Nurul Khizrien

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  1. A. M. Issam
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  2. Sufia Hena
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  3. A. K. Nurul Khizrien
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Correspondence to A. M. Issam.

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Issam, A.M., Hena, S. & Nurul Khizrien, A.K. A New Unsaturated Poly(ester-urethane) Based on Terephthalic Acid Derived from Polyethylene Terephthalate (PET) of Waste Bottles. J Polym Environ 20, 469–476 (2012). https://doi.org/10.1007/s10924-011-0407-0

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  • DOI: https://doi.org/10.1007/s10924-011-0407-0

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