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The author of literature (Prog. Polym. Sci. 26 (2001) 3-65) said:' poly(tetrafluoroethylene) and some of its derivatives exhibit the lowest known dielectric constants with values of e between 1.9...
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I'm studying the phase transition of crystal induced by tensile stress. There are two crystalline phases, with high and low symmetries respectively. Is it easier for the transition from phase...
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