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Calorimetric study of Diepoxide Chain-Extended Poly(Ethylene Terephthalate)

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Abstract

A series of chain-extended PET samples were obtained by the use of different amounts of a diepoxide as chain extender, which was prepared for this purpose. These samples exhibited different intrinsic viscosities and degrees of branching or cross-linking. The effects of this differentiation on the thermal properties were studied by differential scanning calorimetry. The thermal parameters studied were the glass transition temperature (Tg), the cold-crystallization temperature (Tcc), the melting temperature (Tm), the enthalpy (ΔHm) and the degree of crystallinity. The data revealed that, the higher the quantity of chain extender or the chain extension time, the higher Tgand Tcc, but the lower Tmand ΔHm, i.e. the more amorphous the chain-extended samples, as also shown by density measurements.

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Authors and Affiliations

  1. Laboratory of Organic Chemical Technology, Department of Chemistry, Aristotle University of Thessaloniki, GR-540 06, Thessaloniki, Macedonia, Greece

    D. N. Bikiaris & G. P. Karayannidis

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  1. D. N. Bikiaris
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  2. G. P. Karayannidis
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Bikiaris, D.N., Karayannidis, G.P. Calorimetric study of Diepoxide Chain-Extended Poly(Ethylene Terephthalate). Journal of Thermal Analysis and Calorimetry 54, 721–729 (1998). https://doi.org/10.1023/A:1010127500694

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  • DOI: https://doi.org/10.1023/A:1010127500694

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