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首页> 外文期刊>Journal of Applied Polymer Science >Influence of molecular weight on the domain coarsening rates in linear polyethylene-poly(ethylene-co-1-octene) blends
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Influence of molecular weight on the domain coarsening rates in linear polyethylene-poly(ethylene-co-1-octene) blends

机译：分子量对线性聚乙烯-聚乙烯-乙烯-1-辛烯共混物的域粗化速率的影响

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摘要

The coarsening rates of the two-phase morphologies of linear polyethylene/poly(ethylene-co-1-octene) blends were determined as functions of molecular weight. Samples with cocontinuous morphologies that were prepared through solution blending were annealed in the melt state for various times, and subsequently the length scales of the morphologies were determined with a line-intersection method. Length-scale data were multiplied by a function that normalized for the effects of differences in zero-shear-rate viscosity and thermal energy; after normalization, the data largely fell on one trend line within the bounds of experimental error. This indicated that the principal effect of increasing molecular weight was to slow the coarsening rate through an increase in melt viscosity, with little effect from the thermodynamic compatibility of the two polymers. (C) 2003 Wiley Periodicals, Inc. [References: 26]
机译：确定线性聚乙烯/聚（乙烯-co-1-辛烯）共混物的两相形态的粗化速率，作为分子量的函数。通过溶液共混制备的具有连续连续形态的样品在熔融状态下退火多次，然后通过线相交法确定形态的长度尺度。长度比例数据乘以针对零剪切速率粘度和热能差异的影响归一化的函数;归一化后，数据在实验误差范围内很大程度上落在一条趋势线上。这表明增加分子量的主要作用是通过提高熔体粘度来减慢粗化速率，而对两种聚合物的热力学相容性影响很小。 （C）2003 Wiley Periodicals，Inc. [参考：26]

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