Journal of Materials Science

, Volume 30, Issue 22, pp 5833–5840 | Cite as

Environmental stress cracking of PVC and PVC-CPE

Part III Crack growth
  • J. Breen


The fracture toughness of Polyvinylchloride (PVC) and PVC modified with 10% chlorinated polyethylene (PVC-CPE) was studied in vapour and in liquid environments by crack growth measurements on single-edge notch specimens under three-point bending at 23°C. In addition, some results obtained in air at lower temperatures are presented. The fracture toughness is quantified by a stress intensity factor leading to failure after a given loading period. It is shown that for a given slow crack growth rate at 23 °C, the environment hardly affects the fracture toughness of PVC. In contrast, the slow crack growth in PVC-CPE at 23 °C is accelerated by the presence of benzene vapour, n-octane/benzene mixtures and gas condensate. A decrease in temperature results in an increase in fracture toughness, both for PVC and for PVC-CPE. A Dugdale model to describe the craze ahead of the crack was used to analyse the observed changes in fracture toughness.


Chlorinate Fracture Toughness Stress Intensity Intensity Factor Stress Intensity Factor 
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Copyright information

© Chapman & Hall 1995

Authors and Affiliations

  • J. Breen
    • 1
  1. 1.TNO Plastics and Rubber Research InstituteJA DelftThe Netherlands

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