which particular class of polymer has high thermal expansion coefficients
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From metals high coefficient of thermal expansion has, for example, aluminium: about 22x10-6K-1, with an E-modulus of about 70 GPa. Austhenitic stainless steels also have quite high coefficient of thermal expansion of approx. 17x10-6K-1 with an E-modulus of approx. 200 GPa
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