A spinodal equation based on the modified Prigogine Flory′s equation of state theory was derived and applied to predicting the phase behavior of a ternary polymer blend comprising styrene methyl methacrylate copolyme...A spinodal equation based on the modified Prigogine Flory′s equation of state theory was derived and applied to predicting the phase behavior of a ternary polymer blend comprising styrene methyl methacrylate copolymer(SMMA), styrene acrylonitrile copolymer(SAN)and poly methyl methacrylate(PMMA). According to Flory′s combining rules, the parameters of state equation for copolymers were evaluated from those of the constituent monomer segments, and binary segmental contact energy parameters X ij between copolymer and copolymer were computed. The numerical solution of spinodals of SMMA PMMA SAN at various temperatures was derived by computer programming, and confirmed by the corresponding experimental results. It was found that Flory′s equation of state theory could be successfully extended to predict the phase behavior of ternary copolymer blends by adding the term of interaction entropy parameters Q ij evaluated from the phase diagrams of the corresponding binary blends.展开更多
文摘A spinodal equation based on the modified Prigogine Flory′s equation of state theory was derived and applied to predicting the phase behavior of a ternary polymer blend comprising styrene methyl methacrylate copolymer(SMMA), styrene acrylonitrile copolymer(SAN)and poly methyl methacrylate(PMMA). According to Flory′s combining rules, the parameters of state equation for copolymers were evaluated from those of the constituent monomer segments, and binary segmental contact energy parameters X ij between copolymer and copolymer were computed. The numerical solution of spinodals of SMMA PMMA SAN at various temperatures was derived by computer programming, and confirmed by the corresponding experimental results. It was found that Flory′s equation of state theory could be successfully extended to predict the phase behavior of ternary copolymer blends by adding the term of interaction entropy parameters Q ij evaluated from the phase diagrams of the corresponding binary blends.
文摘采用机械共混法制备了Si O2改性的CPVC/PVDF/PMMA复合材料,考察了Si O2用量、PVB、PVC、丁腈粉、DBP对材料成膜性能、吸墨性能、柔软性和韧性的影响.结果表明:1当Si O2的质量浓度为4.5%时,CPVC的成膜性和吸墨性能最佳;2当DBP、丁腈粉的质量分数分别为3.0%和3.4%时,膜的柔韧性最佳;3最佳的制备工艺是将PMMA、CPVC、PVDF和丁腈粉溶于DMAC和DBP的混合溶液中,再恒温4 h.
