新型共聚水凝胶P(HEMA-co-NEVER)网络结构参数的研究  

Network Parameters Study of Novel P(HEMA-co-NEVER) Copolymeric Hydrogels

作　　者：林智辉[1] 吴文辉[1] 王建全[1] 靳昕[2] 

机构地区：[1]北京理工大学材料科学与工程学院,北京100081 [2]中国地质大学材料科学与工程学院,北京100083

出　　处：《高分子材料科学与工程》2007年第4期132-135,共4页Polymer Materials Science & Engineering

基　　金：中国石化集团总公司科研基金(P0043)

摘　　要：采用大分子单体酚醛环氧型乙烯基酯树脂(NEVER)与亲水性单体甲基丙烯酸-β-羟乙酯(HEMA)为原料,以本体聚合方法制备了一系列新型水凝胶。研究了NEVER质量分数、温度对水凝胶溶胀、拉伸性能的影响,并在宏观性能研究的基础上进而对交联网络结构参数进行了研究。NEVER含量的增大加强了水凝胶内部疏水基团间的相互作用,使平衡含水量EWC降低,聚合物体积分数Φ2增大,拉伸强度、杨氏模量、有效交联密度eν以及聚合物-水相互作用参数χ也随之增大,网链分子量Mc减小。当温度由273 K升至343 K,水凝胶样品H/N 7的EWC值下降,Φ2值和χ值增大。A series of hydrogels based on macromonomer novolac epoxy vinyl ester resin （NEVER） and hydrophilic-2-hydroxyethyl methacrylate （HEMA） were synthesized by bulk copolymerization. The effects of NEVER content and temperature on network parameters such as effective erosslink density （ve）, molar mass between crosslinks （Mc） and polymer-water interaction parameter （Χ） of hydrogels were studied on the basis of swelling and tensile properties. The increase of NEVER content can enhance hydrophobic bonding within hydrogel, leading to the decrease in equilibrium water content （EWC） and the increase in volume fraction of polymer in hydrogel （Φ2）, and tensile strength, Young＇s modulus, ve and Χ values of hydrogels also increases and Mcdecreases. When the temperature is increased from 273 K to 343 K, the hydrogel H/N7 undergoes decreasing in EWC and increasing in Φ2 indicated that the swelling process is an exothermic and Χ values. The thermodynamic analysis process.

关 键 词：水凝胶 溶胀性能 拉伸性能 有效交联密度 相互作用参数 

分 类 号：TQ427.25[化学工程]