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首页> 外文期刊>Journal of Applied Polymer Science >Creating Layers of Concentrated Inorganic Particles by Interdiffusion of Polyethylenes in Microlayers
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Creating Layers of Concentrated Inorganic Particles by Interdiffusion of Polyethylenes in Microlayers

机译：通过微层中聚乙烯的相互扩散形成浓无机颗粒层

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Interdiffusion of a polymer pair in microlayers was exploited to increase the concentration of inorganic particles in one of the components. When microlayers of linear low-density polyethylene (LLDPE) and low-density polyethylene (LDPE) were taken into the melt, greater mobility of linear LLDPE chains compared to branched LDPE chains caused the layer boundary to move in the direction of the more slowly diffusing chains in a manner similar to the Kirkendall effect in metals. This resulted in substantial shrinkage of teh LLDPE layers and corresponding thickening of the LDPE layers. Adding a particulate in teh LLDPE did not impede the process of interdiffusion in the melt, and the resultant shrinkage served to increase the particle concentration. For example, resistivity of initially nonconductive LLDPE layers containing nickel platelets decreased by 6 orders of magnitude into the semiconductor range after shrinkage concentrated the particles. The concentrating effect was also demonstrated with TiO_2 particles and talc platelets.
机译：利用聚合物对在微层中的相互扩散来增加组分之一中无机颗粒的浓度。当将线性低密度聚乙烯（LLDPE）和低密度聚乙烯（LDPE）的微层放入熔体中时，与分支LDPE链相比，线性LLDPE链的迁移率更高，导致层边界向扩散速度更慢的方向移动链的方式类似于金属中的柯肯德尔效应。这导致LLDPE层大量收缩，并且LDPE层相应变厚。在LLDPE中添加颗粒不会阻碍熔体相互扩散的过程，所产生的收缩有助于增加颗粒浓度。例如，在收缩使颗粒浓缩之后，包含镍片晶的最初不导电的LLDPE层的电阻率在半导体范围内降低了6个数量级。 TiO_2颗粒和滑石粉的浓缩效果也得到了证实。

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