_____________ polythene is most prone to stress-cracking ?
Correct answer: A. High density
- A. High density
- B. Low density
- C. Cross-linked
- D. Linear low density
Explanation
High-density polythene is more prone to environmental stress cracking because its greater crystallinity and stiffness allow cracks to initiate and propagate more readily. Low-density polythene is more flexible and generally resists this failure better.
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