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Adsorption-entanglement layers have been shown to interfere with the measurement of intrinsic viscosity of high-molecular weight (M
w1730p0rg5/xxlarge8819.gif" alt="gap" align="MIDDLE" BORDER="0">106) atactic polystyrene solutions. Values of the intrinsic viscosity, corrected for the pressure of any such layers are reported. The Mark-Houwink relationship is thus shown to fail at high molecular weights. 相似文献
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