采用半连续种子乳液聚合法,以2-丙烯酰胺基-2甲基丙烷磺酸钠盐(AMPS-Na)为乳化剂,合成了改性聚醋酸乙烯酯乳液。探讨了反应性乳化剂AMPS-Na和保护胶体PVA两者对乳液聚合稳定性的影响,对乳液的固含量、黏度、压缩剪切强度和粒径进行了表...采用半连续种子乳液聚合法,以2-丙烯酰胺基-2甲基丙烷磺酸钠盐(AMPS-Na)为乳化剂,合成了改性聚醋酸乙烯酯乳液。探讨了反应性乳化剂AMPS-Na和保护胶体PVA两者对乳液聚合稳定性的影响,对乳液的固含量、黏度、压缩剪切强度和粒径进行了表征。结果表明:AMPS-Na用量在0.4%时,乳液综合性能良好;固含量为38.54%,黏度476.0 m Pa·s,压缩剪切强度为14.44 MPa,乳液粒径34.5 nm。展开更多
Polyvinylacetal of 4-[2-(4-formylphenyl)ethenyl]pyridium(PVA-FEP) was synthesized and the layer by layer self-assembly from PVA-FEP as polycation with a series of polyanions was investigated. The multilayer utrathin f...Polyvinylacetal of 4-[2-(4-formylphenyl)ethenyl]pyridium(PVA-FEP) was synthesized and the layer by layer self-assembly from PVA-FEP as polycation with a series of polyanions was investigated. The multilayer utrathin films formed are photoreactive. Under UV irradiation the [2+2] cycloaddition of the styrylpiridium moieties of PVA-FEP takes place to produce crosslinking net works in the layers of the film. And the stability of the irradiated film toward polar solvents enhances greatly. The patterning of the film has been realized by selective UV exposure of the film through a photomask then developing in saturated sodium dodecyl sulfate aqueous solution.展开更多
文摘采用半连续种子乳液聚合法,以2-丙烯酰胺基-2甲基丙烷磺酸钠盐(AMPS-Na)为乳化剂,合成了改性聚醋酸乙烯酯乳液。探讨了反应性乳化剂AMPS-Na和保护胶体PVA两者对乳液聚合稳定性的影响,对乳液的固含量、黏度、压缩剪切强度和粒径进行了表征。结果表明:AMPS-Na用量在0.4%时,乳液综合性能良好;固含量为38.54%,黏度476.0 m Pa·s,压缩剪切强度为14.44 MPa,乳液粒径34.5 nm。
文摘Polyvinylacetal of 4-[2-(4-formylphenyl)ethenyl]pyridium(PVA-FEP) was synthesized and the layer by layer self-assembly from PVA-FEP as polycation with a series of polyanions was investigated. The multilayer utrathin films formed are photoreactive. Under UV irradiation the [2+2] cycloaddition of the styrylpiridium moieties of PVA-FEP takes place to produce crosslinking net works in the layers of the film. And the stability of the irradiated film toward polar solvents enhances greatly. The patterning of the film has been realized by selective UV exposure of the film through a photomask then developing in saturated sodium dodecyl sulfate aqueous solution.
