Polyelectrolyte complex formed from diazoresin(DR) as cationic polyelectrolyte and alkaline hydrolysate of styrenemaleic anhydride copolymer(PSMNa) as anionic polyelectrolyte does not dissolve in water or organic solv...Polyelectrolyte complex formed from diazoresin(DR) as cationic polyelectrolyte and alkaline hydrolysate of styrenemaleic anhydride copolymer(PSMNa) as anionic polyelectrolyte does not dissolve in water or organic solvents due to its ionic crosslinking structure. It was found that the solubility of this complex was greatly enhanced in aqueous solution of sodium dodecyl sulfate(SDS). The solubility of DRPSMNa complex in 0.1 mol/L and 0.15 mol/L SDS aqueous solution was determined to be 0.024 g/mL and 0.033 g/mL respectively. It was also confirmed that the complex from DR and SDS, which does not dissolve in water, can also dissolve in SDS aqueous solution. The decomposition temperature(T d ) of diazonium groups for different complexes was determined by DSC and shows that the T d of DRPSMNa after dissolution in SDS aqueous solution changes to 146 ℃ from the original value of 133 ℃. It was proposed that during the dissolution of PEC in surfactant aqueous solution, the complex is separated to its two components via the interaction between PEC and surfactant molecules at first, then the components dissolve in water.展开更多
以异氟尔酮二异氰酸酯(IPDI)、聚氧乙烯长链烷基胺(PAE)等为主要原料,合成了一系列兼具阳离子特性和非离子特性的新型聚氨酯高分子表面活性剂;并对产物进行了红外分析,研究了其侧链烷基碳数、环氧乙烷加合数及外加电解质对表面张力、临...以异氟尔酮二异氰酸酯(IPDI)、聚氧乙烯长链烷基胺(PAE)等为主要原料,合成了一系列兼具阳离子特性和非离子特性的新型聚氨酯高分子表面活性剂;并对产物进行了红外分析,研究了其侧链烷基碳数、环氧乙烷加合数及外加电解质对表面张力、临界胶束浓度的影响。实验结果表明,当PAE侧链烷基为C_(18),环氧乙烷加合数目为5时,其聚氨酯高分子表面活性剂综合性能优异,溶液的临界胶束浓度为39.600 mg/L,水溶液的表面张力最低可达33.131 m N/m。展开更多
以氢化苯基甲烷二异氰酸酯(H-MDI)、聚氧乙烯十二烷基胺(PAE)、聚乙二醇(PEG)为主要原料,合成了系列侧链含十二烷基、主链嵌入大量聚环氧乙烷(EO)结构的阳-非离子型聚氨酯表面活性剂(PUS)。通过红外光谱(FT-IR)、表面张力、临界胶束浓...以氢化苯基甲烷二异氰酸酯(H-MDI)、聚氧乙烯十二烷基胺(PAE)、聚乙二醇(PEG)为主要原料,合成了系列侧链含十二烷基、主链嵌入大量聚环氧乙烷(EO)结构的阳-非离子型聚氨酯表面活性剂(PUS)。通过红外光谱(FT-IR)、表面张力、临界胶束浓度、乳化力测试等对其进行分析。结果表明:当以PAE为软段单体,以聚乙二醇(PEG-200)为扩链剂时,合成的聚氨酯高分子表面活性剂的综合性能优异,溶液的临界胶束浓度为53.10 mg/L,水溶液的表面张力最低可达38.12 m N/m。展开更多
文摘Polyelectrolyte complex formed from diazoresin(DR) as cationic polyelectrolyte and alkaline hydrolysate of styrenemaleic anhydride copolymer(PSMNa) as anionic polyelectrolyte does not dissolve in water or organic solvents due to its ionic crosslinking structure. It was found that the solubility of this complex was greatly enhanced in aqueous solution of sodium dodecyl sulfate(SDS). The solubility of DRPSMNa complex in 0.1 mol/L and 0.15 mol/L SDS aqueous solution was determined to be 0.024 g/mL and 0.033 g/mL respectively. It was also confirmed that the complex from DR and SDS, which does not dissolve in water, can also dissolve in SDS aqueous solution. The decomposition temperature(T d ) of diazonium groups for different complexes was determined by DSC and shows that the T d of DRPSMNa after dissolution in SDS aqueous solution changes to 146 ℃ from the original value of 133 ℃. It was proposed that during the dissolution of PEC in surfactant aqueous solution, the complex is separated to its two components via the interaction between PEC and surfactant molecules at first, then the components dissolve in water.
文摘以异氟尔酮二异氰酸酯(IPDI)、聚氧乙烯长链烷基胺(PAE)等为主要原料,合成了一系列兼具阳离子特性和非离子特性的新型聚氨酯高分子表面活性剂;并对产物进行了红外分析,研究了其侧链烷基碳数、环氧乙烷加合数及外加电解质对表面张力、临界胶束浓度的影响。实验结果表明,当PAE侧链烷基为C_(18),环氧乙烷加合数目为5时,其聚氨酯高分子表面活性剂综合性能优异,溶液的临界胶束浓度为39.600 mg/L,水溶液的表面张力最低可达33.131 m N/m。
文摘以氢化苯基甲烷二异氰酸酯(H-MDI)、聚氧乙烯十二烷基胺(PAE)、聚乙二醇(PEG)为主要原料,合成了系列侧链含十二烷基、主链嵌入大量聚环氧乙烷(EO)结构的阳-非离子型聚氨酯表面活性剂(PUS)。通过红外光谱(FT-IR)、表面张力、临界胶束浓度、乳化力测试等对其进行分析。结果表明:当以PAE为软段单体,以聚乙二醇(PEG-200)为扩链剂时,合成的聚氨酯高分子表面活性剂的综合性能优异,溶液的临界胶束浓度为53.10 mg/L,水溶液的表面张力最低可达38.12 m N/m。
