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Answer #1
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I Tg is the temperature where polymees softens from hard substance to soft rubber like mälesial. Hiches the Tg stable will be the molecule fire it won't get affected a softens). Therefore in the set @ polybutylene terephthalate) Tg = 52c will be more stable and in get 1 poly(phenyl methacaglate) Tg = 110°C will be more stable.
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4. Which polyester in a. and b., below, will most likely be stable to change inside...
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