【摘要】 利用剪切速率趋于零时聚合物熔体粘度与分子参数和流体本征性质的直接相关性，在低剪切速率０．０５～０．２ｓ－１、温度１８０～２２０℃条件下，测定了分子量Ｍｗ＝１０５×１０４～２６６×１０４３种超高分子量聚苯乙烯（ｐｓ）的流动活化能，结果表明，聚合物分子量大幅度增加对流动活化能的变化不敏感。更多还原

【Abstract】 The flow activation energy of ultra high molecular weight polystyrene with Mw=105×104～266×104 was determined by zero shear viscosity at low shear rate 0. 05～0. 2 s-1 in the temperature range of 180℃ to 220℃ respectively. The results indicated that flow activation energy of these polymer were not sensitive to their molecular weight.更多还原