【摘要】 实验测定了PEG((?)_n=200),PEG((?)_n=300),PEG((?)_n=400),PEG((?)_w=15000)和PDMS((?)_w=20000)在20～90℃温度范围的热压力系数和密度,它们的热压力系数和内压几乎与分子量无关.据此还建立了一个聚合物内压的对应状态模型,它只含一个可调参数,能满意地适用于各种聚合物.更多还原

【Abstract】 The thermal pressure coefficients and densities of PEG(Mn = 200) , PEG(Mn = 300) , PEG(Mn = 400) , PDMS(Mw = 15000) and PDMS(MW = 20000) have been measured over the temperature range of 20 ~ 90℃. It is found that their thermal pressure coefficients and internal pressures are almost in dependent of the molecular weight. A corresponding state model of internal pressure with only one adjustable parameter for polymers is established, which can be applied to various polymers satisfactorily.更多还原