Environmental Stress Cracking can be defined as the acceleration of stress cracking due to contact with a fluid (liquid or vapor, for example caustic solutions on polypropylene) or with “swelling” agents without chemical degradation (it is a purely physical mechanism).
The interactions between the fluid, the stress, and the polymer include: local yielding with localized fluid absorption, plasticization of the zone with crack formation, crack growth, and corresponding fracture of the material without irreversible chemical changes.
The instrument consists of:
• Specimen notching tool.
• Specimen bending tool.
• Specimen moving tool.
• Sample holder
• Constant-temperature oil bath that allows the samples to be conditioned to the desired temperature.
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