【摘要】 用DSC测定的方法在等温条件下研究了聚酰胺6/磺化聚苯乙烯钠盐共混物(PA-6/NaSPS)和聚酰胺6/磺化聚苯乙烯锰盐共混物(PA-6/MnSPS)的结晶动力学。对于PA-6/MnSPS共混物,结晶速率(G)和成核速率(N)既与过冷度(ΔT)有关又与共混物组成(φMnSPS)有关,而PA-6/NaSPS共混物的G和N仅与ΔT有关,与φNaSPS无关。对于PA-6/MnSPS共混物,化学势差(ΔTG=0.005/T0m)和结晶的表面自由能参数(K和S)随φMnSPS的增加而增加,而PA-6/NaSPS共混物的ΔTG=0.005/T0m、K和S几乎不随φNaSPS的变化而变化。这些都说明PA-6/MnSPS共混物是相容的,PA-6/NaSPS是不相容的。更多还原

【Abstract】 The crystallization dynamics of polyamide-6 and a sulfonated polystyrene neutralized with sodium,manganese(PA-6/NaSPS,PA-6/MnSPS) was analyzed by DSC under isothermal conditions.The crystal growth rate(G)and the nucleation rate(N) depended on both the degree of supercooling(ΔT) and the blend weight fraction(φMnSPS) for PA-6/MnSPS blends.However,G and N of PA-6/NaSPS blends depended only on ΔT and was independent of φNaSPS.The ΔT/T0m values obtained at the fixed G,which corresponded to the chemical potential difference between molecules in the liquid and the crystal state,and the surface free energy parameters(K and S) of PA-6 crystals evaluated from G and N depended on φMnSPS for PA-6/MnSPS blends,although the ΔT/T0m values and surface free energy parameters of PA-6/NaSPS was almost constant and independent of φNaSPS.These results suggest that PA-6/MnSPS blends are miscible but PA-6/NaSPS blends are immiscible.更多还原