Poly frictional ratios

In the presence of compatibilizers, a similar process might be followed. Kumari et alP mixed poly(ethylene-co-vinyl acetate) (EVA) with NR and NBR (34% ACN content). Blending took place in a two-roll mill at a nip gap of 1.3 mm and at a friction ratio of 1 1.4. The crosslink agent used was DCP at 2 phr and the EVA amount in the mixture did not exceed 6 phr. Kader et alP used an internal mixer to compatibilize with /raw -polyoctylene rubber (TOR) a Standard Malaysian Rubber with NBR (34% ACN content) at a 50/50 weight ratio. The TOR amount reached up to 40 wt% of the blend where the cure package was based on sulfur. ZnO and stearic acid were introduced in the internal mixer while sulfur and N-tert-butyl-2-benzothiazole sulfenamide (TBBS) were added on a two-roll mill. 

Sedimentation and Diffusion Coefficients, Partial Specific Volumes, and Frictional Ratios of Poly(dienes) VII / 95... 

Fig. 6. The temperature dependence of the friction coefficient of the poly( acrylamide) gels. The total concentrations of acrylamide are 1.24 M (8.8% mass fraction), and 693 mM (5% mass fraction), respectively. Open symbols are used for the results obtained in the cooling process and closed symbols represent the results taken upon increasing the temperature. In the upper part of this figure, the temperature dependence of the ratio f(T)/rj T) is shown. The values of the viscosity are taken from a table. Symbols are the same as those used in the raw value of the friction coefficient...

KEYWORDS atomic force microscopy friction lubrication thin films polymer coatings poly(L-lysineFgr< -poly(ethylene glycol) polymer architecture grafting ratio silicon oxide... 

---