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Home  >  Journal list  >  Polymer Journal  >  Vol.45  No.3 (2013)  >  pp.300-306

Polymer Journal
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Mechanical properties of a polymer network of Tetra-PEG gel

Asumi Sugimura1, Makoto Asai1, Takuro Matsunaga1, Yuki Akagi2, Takamasa Sakai2, Hiroshi Noguchi1 and Mitsuhiro Shibayama1
1Institute for Solid State Physics, The University of Tokyo, Kashiwa, Chiba, Japan
2Department of Bioengineering, School of Engineering, The University of Tokyo, Bunkyo-ku, Tokyo, Japan

The elastic properties of Tetra-polyethylene glycol (PEG) gel, a four-armed PEG network gel, were studied by simulating the deformation of elastic networks containing defects that are randomly introduced to the network. This network model accurately reproduced the experimental results observed for Tetra-PEG gel. In particular, the stress-extension ratio curve of the gel prepared at chain-overlap concentration was in agreement with that of a regular network without defects. As the defect density increased, the Young’s modulus decreased linearly. The fracture and spatial inhomogeneity of the networks were also investigated in the simulation.

defect gel; large deformation; percolation; polymer gel; Tetra-PEG gel

Received: January 16, 2012 , Revised: May 31, 2012
Accepted: June 13, 2012 , Published online: August 15, 2012
© 2013 The Society of Polymer Science, Japan

NatureAbstract (Nature)


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