AM/PVP互穿网络结构树脂的制备及其性能

Preparation and properties of AM/PVP interpenetrating network structure resin

通过用MBA做引发剂,APS做交联剂,运用前端聚合制备聚丙烯酰胺(AM)/聚乙烯吡咯烷酮(PVP)互穿水凝胶,进而研究配比的不同对水凝胶的性能差异:用红外光谱表征互穿网络水凝胶的结构性能。当溶剂水的含量及交联剂,引发剂的含量均不变的情况下,调整PVP的含量使其含量从占单体的0%~40%时水凝胶的性能。随着PVP含量的依次增加,吸水速率从800g/g减到550 g/g,吸盐水速率从267 g/g减到183 g/g。当AM与PVP的含量及交联剂,引发剂的含量均不变的情况下,调整溶剂水的含量,从16~20 m L时水凝胶的性能。随着水含量的依次增加,水凝胶的,吸水率从756~402 g/g,吸盐水速率从252 g/g减到134 g/g。当AM与PVP的含量及交联剂,水的含量均不变的情况下,调整引发剂APS的含量,从0.23~0.27 g时水凝胶的性能。随着引发剂APS含量的依次增加,吸水速率和吸盐水速率都是先增大后减小。将前端聚合与常规聚合方法进行了对比。

In this paper, by using MBA as initiator and APS as crosslinker, polyacrylamide（AM）/polyvinylpyrrolidone（PVP） interpenetrating hydrogel was prepared by front end polymerization, and the difference in the performance of the hydrogels with different proportions was studied. The structure and properties of IPN hydrogels were characterized by IR. When the contents of the solvent water, the crosslinker and the initiator were all constant, the content of PVP was adjusted from 0~40% of the monomer, then the properties of the hydrogels were observed. With the increase of PVP content, the water absorption rate decreased from 800 g/g to 550 g/g, and the brine uptake rate decreased from 267 g/g to 183 g/g. When the content of AM, PVP, crosslinker and initiator were all constant, the content of solvent water was adjusted from 16 m L to 20 m L, and the properties of hydrogels were observed. With the increase of water content, the water absorption of hydrogels decreased from 756 g/g to 402 g/g, and the rate of brine uptake decreased from 252 g/g to 134 g/g. When the content of AM, PVP, crosslinker and water were all constant, the content of initiator was adjusted from 0.23 g to 0.27 g, and the properties of hydrogels were observed. With the increase of initiator APS content, the water uptake rate and brine uptake rate both increased first and then decreased. The frontal polymerization was compared with the conventional polymerization method in this paper.