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首页> 外文期刊>Journal of Applied Polymer Science >Development of dispersed phase size and its dependence on processing parameters
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Development of dispersed phase size and its dependence on processing parameters

机译：分散相尺寸的发展及其对加工参数的依赖性

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Through measurement of phase dimension via laser scattering, phase morphology development in immiscible blends of polyamide 12/poly(ethylene glycol) (PEG) with an extremely high viscosity ratio was investigated. The blends were prepared by melt blending in a batch mixer. The objective was to examine the influence of mixing time, rotor speed, as well as blending temperature on the size distribution of the minor phase. It is of interest that the breakup process of the dispersed PA 12 phase was observed for the blend systems even for extremely high viscosity ratios of <= 10(2)-10(3). Mixing time had a significant effect on the development of dispersed phase size distribution. It was found that the bulk of particle size reduction took place very early in the mixing process, and very small droplets with a diameter of 0.1-10 mu m were produced. The number of small particles then decreased, resulting in a larger average particle size. With further prolonged mixing, the particle size levels off. The particle size and its distribution were also found to be sensitive to the rotor speed. The average particle size decreased with increased rotor speed. The effect of blending temperature on size and size distribution, which has seldom been studied, was also examined in this work. When the blending temperature altered from 190 degrees C to 220 degrees C, the size and its distribution of the dispersed phase varied considerably, and the change of viscosity ratio was found to be the key factor affecting the dispersed phase size. (c) 2006 Wiley Periodicals, Inc.
机译：通过激光散射测量相尺寸，研究了具有极高粘度比的聚酰胺12 /聚乙二醇（PEG）不混溶共混物的相形态发展。通过在间歇混合器中熔融共混来制备共混物。目的是检查混合时间，转子速度以及混合温度对次相尺寸分布的影响。令人感兴趣的是，即使对于极高的粘度比<= 10（2）-10（3），对于共混体系也观察到分散的PA 12相的破裂过程。混合时间对分散相尺寸分布的发展有重要影响。发现在混合过程中很早就发生了大部分的粒径减小，并且产生了直径为0.1-10μm的非常小的液滴。然后，小颗粒的数量减少，从而导致较大的平均粒径。随着进一步延长的混合，粒度趋于稳定。还发现粒度及其分布对转子速度敏感。平均粒径随着转子转速的增加而减小。这项工作还研究了很少研究混合温度对尺寸和尺寸分布的影响。当共混温度从190℃改变为220℃时，分散相的尺寸及其分布变化很大，发现粘度比的变化是影响分散相尺寸的关键因素。 （c）2006年Wiley Periodicals，Inc.

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