Low-density polyethylene is normally translucent. If a piece of this material is bent into a tight radius, it translates less light (becomes chalky white). What is this phenomena called? Explain why this happens. Explain why the material often breaks after repeated bends
What will be an ideal response?
The change in light transmission due to stress like bending is called blushing. Blushing forms where areas of crystallinity are created caused by these stresses. As a rule, crystalline areas transmit less light than an amorphous region. The break will come as the induced crystallinity increases and those areas become brittle. Failure will occur when that crystallinity becomes significant.
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