INSTANTANEOUS SURFACE STRESSES OF SWELLING AND DRYING OF POLYMERIC GELS

摘要：

When a polymeric network is immersed in a solvent,the network imbibesmolecules from the solvent,forming an aggregate known as a polymeric gel.As thesolvent molecules mix into the network,the gel swells and develops inhomogeneousfields of stress and solvent concentration.This paper simulates the swelling of a thinlayer of the gel immersed in the solvent and subject to applied forces in the plane ofthe gel.The swelling is regarded as a nonequilibrium thermodynamic process,motivated by the increase of the entropy due to mixing the polymers and the solventmolecules,but resisted by the decrease of the entropy due to stretching the polymericnetwork.The stress in the gel can be very high,consistent with the reportedexperimental observations of ruptures and wrinkles.

关键词： polymer gels diffusion large deformation swelling

作者: Jinxiong Zhou Wei Hong Xuanhe Zhao Zhigang Suo

作者单位: MOE Key Laboratory for Strength and Vibration,School of Aerospace,Xian Jiaotong Unviersity,Xian 71 School of Engineering and Applied Sciences,Harvard University,Cambridge,MA 02138,USA

会议类型: 国际会议

会议名称: 第二届国际非均质材料力学会议(The Second International Conference on Heterogeneous Material Mechanics)

会议地点: 安徽黄山

会议语种:英文

页码: 602-604

在线出版日期: 2008-06-03（万方平台首次上网日期，不代表论文的发表时间）