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《ACTA POLYMERICA SINICA》 1994-04
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THE INFLUENCES OF MOLECULAR WEIGHT ON THE RHEOLOGICAL PROPERTYS OF PHENOLPHTHALEIN POLY(ETHER-ETHER-KETONE)

DI Yingwei; LI Binyao; CHEN Tianlu(Changchun Institute of Applied Chemistry, Academia Sinica, Changchun, 130022)  
heological properties at a low shear rate range(10-2-10s-1) and the glass transition temperatures for PEK-C with different moleCular weithts have been studied by using a cone/plate rheometer and DSC' The activation energy for melt flow increases with Mw The dependence of Tg on molecular weight exhibits two linear range and the value of nitersect agrees with the critical molecular weight , Mc' which is first reported for PEK-C' Mc value obtained according to η0 is about 8× 104 g/mol and the relation between Mc and temperature was discussed.
【CateGory Index】: O632.7
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