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Determination and comparison of the plane stress essentialwork of fracture of three polyesters PET, PPT and PBT

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Abstract

The essential work of fracture (EWF) method has been used to study the relationship between molecular structure and thin film fracture toughness for three ductile polyesters at ambient temperature. The fracture toughness of PPT is of particular interest. Successful fracture characterisation of thin film polyesters has been achieved by the EWF method using double edge notched tension (DENT) specimens. The specific essential work of fracture, w e, for polyethylene terephthalate (PET), polypropylene terephthalate (PPT) and polybutylene terephthalate (PBT) films is found to be 35.54±2.56, 41.03±3.23 and 31.34±8.60 kJ m–2, respectively. Differential scanning calorimetry (DSC) has been employed to investigate the crystallinity of the polymers concerned and the effect of this on their EWF values.

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Authors and Affiliations

  1. School of Science and Technology, University of Teesside, Middlesbrough, UK, TS1 3BA, Borough Road

    L. Vincent, S. N. Connolly & S. A. A. Jayaweera

  2. Medtronic/AVE Ireland Ltd, Galway, Ireland, Parkmore Business Park West

    F. Dolan

  3. ICI, Wilton Centre, Wilton, Redcar, UK, TS10 4RF

    P. H. Willcocks

  4. Boston Scientific Europe, Cork Business and Technology Park, Cork, Ireland, Model Farm Road

    R. Pendlebury

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  1. L. Vincent
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  2. S. N. Connolly
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  3. F. Dolan
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  4. P. H. Willcocks
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  5. S. A. A. Jayaweera
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  6. R. Pendlebury
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Correspondence to S. N. Connolly.

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Vincent, L., Connolly, S.N., Dolan, F. et al. Determination and comparison of the plane stress essentialwork of fracture of three polyesters PET, PPT and PBT. J Therm Anal Calorim 86, 147–154 (2006). https://doi.org/10.1007/s10973-006-7595-1

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  • DOI: https://doi.org/10.1007/s10973-006-7595-1

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