Blends of polyphenylene sulfide (PPS) containing trace amounts of branching and/or cross-linking in chain and Polyamide-66 (PA-66) have been prepared by melt blending. The rheological behavior of PPS/PA-66 blends has ...Blends of polyphenylene sulfide (PPS) containing trace amounts of branching and/or cross-linking in chain and Polyamide-66 (PA-66) have been prepared by melt blending. The rheological behavior of PPS/PA-66 blends has been studied by means of capillary rheometer, and compared with PPS. The effects of shear rate, shear stress and temperature on the how of PPS/PA-66 blends and PPS are discussed. The non-Newtonian indexes and the activation energies of viscous how are obtained. The results show that the apparent viscosity of PPS/PA-66 blends is not sensitive to shear rate and stress, but decreases with the elevation of temperature. On the contrary, the apparent viscosity of the PPS decreases obviously with the increasing of shear rate and shear stress, but it is increased by the elevation of temperature.展开更多
Polyphenylene sulfide (PPS)/polyamide 6 (PA6) blends were prepared by different methods including melting\|,powder\| and powder\|solution\|blendings.Effect of interface interaction on the crystallization behavior of P...Polyphenylene sulfide (PPS)/polyamide 6 (PA6) blends were prepared by different methods including melting\|,powder\| and powder\|solution\|blendings.Effect of interface interaction on the crystallization behavior of PPS and PA6 componens in these blends were investigated by components differential scanning calorimetry under nonisothermal conditions.The results indicate that the crystallization temperatures for PPS are shifted to a greater extent than those for PA6 in the blends.The PPS and PA6 both crystallize at higher temperatures as a result of blending.The crystallization temperatures of PPS in its blends are always higher than that of pure PPS and are independent of the method of preparation.The order of increase in the crystallization temperatures of PPS is melt\|blends>powder\|solution\|blends>powder\|blends.The PPS crystallization peak becomes narrower and the crystallization temperature shifts to a higher temperature, suggesting a faster rate of crystallization as a result of blending with PA6.This enhancement in nucleation of PPS could be attributed to the possible effect of interfacial interaction between the component polymers in inducing heterogeneous nucleation.展开更多
基金This work was supported by the National High Technology Program Fund(863)of China.
文摘Blends of polyphenylene sulfide (PPS) containing trace amounts of branching and/or cross-linking in chain and Polyamide-66 (PA-66) have been prepared by melt blending. The rheological behavior of PPS/PA-66 blends has been studied by means of capillary rheometer, and compared with PPS. The effects of shear rate, shear stress and temperature on the how of PPS/PA-66 blends and PPS are discussed. The non-Newtonian indexes and the activation energies of viscous how are obtained. The results show that the apparent viscosity of PPS/PA-66 blends is not sensitive to shear rate and stress, but decreases with the elevation of temperature. On the contrary, the apparent viscosity of the PPS decreases obviously with the increasing of shear rate and shear stress, but it is increased by the elevation of temperature.
文摘Polyphenylene sulfide (PPS)/polyamide 6 (PA6) blends were prepared by different methods including melting\|,powder\| and powder\|solution\|blendings.Effect of interface interaction on the crystallization behavior of PPS and PA6 componens in these blends were investigated by components differential scanning calorimetry under nonisothermal conditions.The results indicate that the crystallization temperatures for PPS are shifted to a greater extent than those for PA6 in the blends.The PPS and PA6 both crystallize at higher temperatures as a result of blending.The crystallization temperatures of PPS in its blends are always higher than that of pure PPS and are independent of the method of preparation.The order of increase in the crystallization temperatures of PPS is melt\|blends>powder\|solution\|blends>powder\|blends.The PPS crystallization peak becomes narrower and the crystallization temperature shifts to a higher temperature, suggesting a faster rate of crystallization as a result of blending with PA6.This enhancement in nucleation of PPS could be attributed to the possible effect of interfacial interaction between the component polymers in inducing heterogeneous nucleation.
