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What is the glass transition temperature of Nylon 6,6?

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What is the glass transition temperature of Nylon 6,6?

(a) -120^oC

(b) 50^oC

(c) 85^oC

(d) 210^oC

I had been asked this question in unit test.

My question is based upon Nucleation, Growth and Segregation, Recovery, Recrystallisation and Grain Growth topic in division Mechanical Working Processes & Phase Transformations of Engineering Material & Metallurgy

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Right option is (b) 50^oC

The best explanation: Glass transition temperature of a material is defined as the temperature at which glass transition occurs. It is denoted by Tg. The value of Tg for Nylon 6,6 is 50^oC, and is 265^oC when crystallized.

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