The Mechanical Feature and Dependence of the pH-Sensitive Hydrogel

摘要：

Tensile tests were conducted on poly (AAc-co-AAm) hydrogel sensitive to variations in environmental pH and ionic strength. Mechanical properties (Youngs modulus) were determined at different levels of swelling equilibrium. The results show that there are great shift in the modulus number between the swollen and unswollen states, corresponding to the maximum, the Youngs modulus data in the pH7 buffers is a decrease of 80％. The Poissons ratio of the samples tested in the pH2 with 1.0M ionic strength solution is nearly 0.5, which implying its incompressibility. Analyzing its inner structure, the reason may be the high polymer chains entangled highly, they can resist the deformation. The further investigations of SEM micrographs prove our suggestions about the microstructure change.

关键词： AAc pH sensitive mechanical properties

作者: Zhu Xiufang Yang Ming Zhang Hongxia Nie Yujing

作者单位: Department of Material Engineering Hubei University of Automotive Technology, China

会议类型: 国际会议

会议名称: 2011 International Conference on Advanced Material Research(ICAMR 2011)(2011年先进材料研究国际会议)

会议地点: 重庆

会议语种:英文

页码: 479-482

在线出版日期: 2011-01-21（万方平台首次上网日期，不代表论文的发表时间）