Network structure and compositional effects on tensile mechanical properties of hydrophobic association hydrogels with high mechanical strength
作者:Guoqing Jiang、Chang Liu、Xiaoli Liu、Qingrui Chen、Guohui Zhang、Meng Yang、Fengqi Liu
DOI:10.1016/j.polymer.2010.01.061
日期:2010.3
behavior and re-forming capability of HA-gels, the network structure was established. On the basis of the micellar copolymerization theory, the statistical molecular theory of rubber elastic, and using uniaxial stretching data, the length of the hydrophobic microblocks, the effective network chain density and the molecular weight of the chain length between cross-linking points were evaluated for all HA-gels;
在含十二烷基硫酸钠(SDS)的水溶液中,通过丙烯酰胺(AM)和少量的辛基酚聚氧乙烯丙烯酸酯(OP-4-AC)的胶束共聚成功制备了疏水缔合水凝胶(HA-gels)。HA-凝胶表现出优异的机械性能和透明度。特别是,HA凝胶具有自我修复和成型等重塑能力。通过傅里叶变换红外光谱,HA-凝胶的溶胀行为和重塑能力,建立了网络结构。在胶束共聚理论,橡胶弹性统计分子理论的基础上,并利用单轴拉伸数据确定疏水性微嵌段的长度,评价了所有HA-凝胶的有效网络链密度和交联点之间链长的分子量;此外,还通过门尼-里夫林理论对它们的中等变形区域进行了评估。对于HA凝胶,我们根据拟议的网络结构详细研究了初始溶液OP-4-AC,SDS和AM中组合物含量对其拉伸机械性能的影响。结果清楚地表明它们的抗张强度,断裂能,弹性模量和伸长率很大程度上取决于它们的组成含量。在拟议的网络结构的基础上对其拉伸机械性能进行了研究。结果清楚地表明