重合度分布が異るタイヤコード用レーヨンのラテラルオーダー分布について

抄録

The research was performed to make clear the influence of degree of polymerization and of its distribution upon lateral order distribution in rayon tire cords produced by different makers.
The results were as follows:
1. There is slight correlation between nonuniformity factor (U) in distribution of polymerization degree and amount of the region of lower lateral order distribution.
2. Distinct correlation was not observed in the following; a) Average degree of polymerization...mean value of lateral order distribution. b) Amount of low degree of polymerization material... amount ofthe region of higher lateral order. c) Nonuniformity factor (U)...mean value of lateral order distribution. d) Nonuniformity factor (U)...dQ/do of a peak in the region of higher lateral order. e) Nonuniformity factor (U)...dQ/do of a peak in the region of lower lateral order.
Therefore, it is believed supposed that the influence of distribution of polymerization degree upon lateral order distribution in rayon tire cord is slight, and that the more effective factor lies in the manufacturing methods.
There is a good correlation between mean value of lateral order distribution in rayon tire cord and fatigue resistance (Goodrich cord tension vibator 180°C).