Environmental stress cracking of PVC and PVC-CPE
Copyright policy )Environmental stress cracking of PVC and PVC-CPE
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. © 1995 Chapman & Hall.
- Delft University of Technology Netherlands
Mathematical models, Notched bar tensile testing, Crack propagation, Paraffins, N-octane/benzene mixtures, Plasticization, Stress intensity factors, Benzene, Benzene vapour, Fracture toughness, Critical stress intensity, Gas condensates, Failure (mechanical), Chlorinated polyethylene, Environmental stress cracking, Polyvinyl chlorides, Polyethylenes, Crazing
Mathematical models, Notched bar tensile testing, Crack propagation, Paraffins, N-octane/benzene mixtures, Plasticization, Stress intensity factors, Benzene, Benzene vapour, Fracture toughness, Critical stress intensity, Gas condensates, Failure (mechanical), Chlorinated polyethylene, Environmental stress cracking, Polyvinyl chlorides, Polyethylenes, Crazing
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