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首页> 外文期刊>Journal of Applied Polymer Science >Effect of grafted polymeric lubricant molecular weight on the frictional characteristics of nylon 6,6 fibers
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Effect of grafted polymeric lubricant molecular weight on the frictional characteristics of nylon 6,6 fibers

机译：接枝聚合物润滑剂分子量对尼龙6,6纤维摩擦特性的影响

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摘要

Boundary friction between two crossed nylon 6,6 fibers has been reduced up to 6× by grafting polymeric lubricants to the surface. A modified adhesion model of friction, accommodating multiple materials on the surface, explains the variation in the friction coefficient with the molecular weight of the lubricant. The friction coefficient is proportional to the fraction of the surface covered by the grafted chain, represented by φRG2/A, where A is the surface area per graft site, and RG is the radius of gyration of the lubricant. It is also shown that for larger the grafted chains, the appropriate surface area fraction depends on φRG2/3A. It is argued that if RG of the grafted lubricant is larger than half the distance between graft sites, the next nearest graft site is used due to steric blocking of the nearest graft site.
机译：通过将聚合物润滑剂接枝到表面，两条交叉的尼龙6,6纤维之间的边界摩擦降低了6倍。改进的摩擦粘附模型可在表面容纳多种材料，解释了摩擦系数随润滑剂分子量的变化。摩擦系数与接枝链覆盖的表面比例成比例，以φRG2/ A表示，其中A是每个接枝部位的表面积，RG是润滑剂的回转半径。还显示出对于较大的接枝链，合适的表面积分数取决于φRG2/ 3A。据认为，如果接枝润滑剂的RG大于接枝位点之间距离的一半，则由于最近的接枝位点的空间阻滞而使用下一个最接近的接枝位点。

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