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首页> 外文期刊>日本レオロジ-学会志 >The Effect of Hydrostatic Pressure on the Capillary Flow Behavior of a Polymer MeltSome experimental results by a two-stage capillary method
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The Effect of Hydrostatic Pressure on the Capillary Flow Behavior of a Polymer MeltSome experimental results by a two-stage capillary method

机译：静压压力对两阶段毛细管法对聚合物熔体实验结果的毛细血管流动性能的影响

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摘要

The present study is an experimental investigation of the effects of hydrostatic pressure on the capillary flow behavior of a polystyrene melt by using an Instron type rheometer with a two-stage capillary.The results may be summarized as follows:(1)The relations between the pressure losses in the first and second capillaries are given by the following equationsΔp1=Δptot-Δp2 (a)Δp2=pn (b)where, Δp1 and Δp2 are the pressure losses in the first and second stages, respectively, Δptot is the total pressure loss, which nearly equals the applied pressure p, and pn is the hydrostatic pressure induced by the second capillary. Since the sample is compressed in the first stage by the pressure pn, which is estimated by equation (b), it is possible to make an experimental study of the effects of hydrostatic pressure.(2) The ratio of the viscosity coefficients for hydrostatic pressure flow to that for atmospheric pressure flow η′n/η′o is approximately given by the following equation._??_ (c)where, K1 and N are material constants.(3) The pressure loss due to the elasticity effect of the specimen at the capillary inlet, under the influence of the hydrostatic pressure, is given by the following eqution_??_ (d)where, ΔpE.0 is pressure loss at the capillary inlet under hydrostatic pressure, ΔpE.0 is that under stmospheric pressure, Δυ/υ0 is the volumetric strain, A and K2 are material constants.
机译：本研究是使用具有两阶段毛细管的Instron型流变仪对聚苯乙烯熔体对聚苯乙烯熔体毛细血管流动的影响的实验研究。结果可以概括如下：（1）第一和第二毛细管中的压力损失由下面的等式给出，ΔP1=ΔPtot-ΔP2（a）Δp2= pn（b）其中，其中，Δp1和Δp2分别是第一和第二阶段中的压力损失，Δptot是总压力损耗几乎等于施加的压力P，PN是由第二毛细管引起的静压压力。由于样品在通过方程（b）估计的压力pn中在第一阶段被压缩，因此可以对静液压压力的影响进行实验研究。（2）粘度系数与静水压压力的比率流到大气压流动η'n/η'o大约由以下等式给出._ ?? _（c）其中，K1和N是材料常数。（3）由于弹性效应引起的压力损失毛细管入口处的样品在静液压压力的影响下由下列的静脉_（d）给出，其中ΔPE.0在静水压力下的毛细管入口处的压力损失，ΔPE.0在稳压下压力，ΔΣ/υ0是体积菌株，a和k2是材料常数。

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