Mechanical Properties and Network Structure of Hydrophobic Association Hydrogels Prepared from Octylphenol Polyoxyethylene（7） Acrylate and Sodium Dodecyl Sulfate  

作　　者：LIANG Zi GAO Tingting XU Jianan LI Zhiying LIU Xiaoli LIU Fengqi 

机构地区：[1]College of Chemistry, Jilin University, Changchun 130012, P. R. China

出　　处：《Chemical Research in Chinese Universities》2015年第4期633-639,共7页高等学校化学研究（英文版）

基　　金：Supported by the National Natural Science Foundation of China（No.21174053）.

摘　　要：Hydrophobic association hydrogels（HA-gels） with high mechanical strength were prepared by free radical micellar copolymerization in aqueous solutions of acrylamide（AM）, anion surfactant sodium dodecyl sulfate（SDS） and a small amount of hydrophobic monomer octylphenol polyoxyethylene（7） acrylate（OP-7-AC）. We found that the molar ratio of SDS to OP-7-AC has a great effect on the tensile strength and other mechanical property parameters. The best ratio point R＇ was determined. On the basis of Mooney theory and statistical theory, the critical tensile ratios and critical tensile strengths of the hydrogels were obtained, elastic parameters C1 and C2 were calculated via uniaxial tensile equation and structural parameters, such as the effective network chain density and the averaged molecular weight of the chain between cross-linking points of all the hydrogels were evaluated. The results indicate that the variation of mechanical property parameters depends on the number of effective cross-linking points and the match degree of long and short chains.Hydrophobic association hydrogels（HA-gels） with high mechanical strength were prepared by free radical micellar copolymerization in aqueous solutions of acrylamide（AM）, anion surfactant sodium dodecyl sulfate（SDS） and a small amount of hydrophobic monomer octylphenol polyoxyethylene（7） acrylate（OP-7-AC）. We found that the molar ratio of SDS to OP-7-AC has a great effect on the tensile strength and other mechanical property parameters. The best ratio point R＇ was determined. On the basis of Mooney theory and statistical theory, the critical tensile ratios and critical tensile strengths of the hydrogels were obtained, elastic parameters C1 and C2 were calculated via uniaxial tensile equation and structural parameters, such as the effective network chain density and the averaged molecular weight of the chain between cross-linking points of all the hydrogels were evaluated. The results indicate that the variation of mechanical property parameters depends on the number of effective cross-linking points and the match degree of long and short chains.

关 键 词：Hydrophobic association Cross-linking point Distribution of chain Surfactant 

分 类 号：O647.2[理学—物理化学] X172[理学—化学]