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Films with glass transition temperature below room temperature have more crystallisation rate.

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+1 vote
in Food Packaging Technology by (63.0k points)
Films with glass transition temperature below room temperature have more crystallisation rate.

(a) True

(b) False

This question was addressed to me in a national level competition.

My doubt is from Orientation of Thermoplastic Films topic in division Thermoplastic Polymers Properties & Processing of Food Packaging Technology

1 Answer

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by (194k points)
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Best answer
Right answer is (a) True

Explanation: The given statement is true. Films with glass transition temperature below room temperature have more crystallisation rate. PVdC copolymer and PP are an example.  They show appreciable crystallization rate even at room temperature and, therefore, have to be quenched and oriented immediately after extruding.

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