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Blends of polyphenylene sulfide (PPS) containing trace amounts of branching and/orcross-linking in chain and Polyamide-66(PA-66) have been prepared by melt blending. Therheological behavior of PPS/PA-66 blends has been studied by means of capillary rheo-meter, and compared with PPS. The effects of shear rate, shear stress and temperature onthe flow of PPS/PA-66 blends and PPS are discussed. The non-Newtonian indexes andthe activation energies of viscous flow are obtained. The results show that the apparentviscosity of PPS/PA-66 blends is not sensitive to shear rate and stress, but decreases withthe elevation of temperature. On the contrary, the apparent viscosity of the PPS decreasesobviously with the increasing of shear rate and shear stress, but it is increased by theelevation of temperatue. 相似文献
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Poly (phenylene sulfide amide) (PPSA) has been synthesized by using sulfur as Ssource which reacts with dichlorobenzamide (DCBA) and alkali in polar organic solvent atthe atmospheric pressure. The polymer structures were determined by elemental analysis,FT-IR and ~1H-NMR. It is shown that the yielded polymer has linear structure and itsstructure unit is -p-C_6H_4-CONH-p-C_6H_4-S-. The polymer morphology was studied byX-ray diffraction and polarized microscopy. The results show that PPSA is a crystallinepolymer and its spherulites are the aggregation of nontwisting lamella or micro-threadstructure. Under shearing force, these crystals are dispersed to form micro-fibrillarstructure. The decomposition kinetics of PPSA was also studied at different beating rates.The decomposition energy of PPSA is higher than that of PPS. 相似文献
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本文用二氧化碳激光裂解色谱法(CO_2—LPCC)研究了聚对苯二甲酸乙二醇酯(PET)和聚2.6—萘二甲酸乙二醇酯(简称聚萘酯,PEN—2.6)的裂解.分离采用具有弱极性(SE—30)的双分离柱,用模型化合物鉴定了特征裂解产物,根据裂解图谱,探讨了PET和PEN—2.6的裂解机理. 相似文献