title   
  

Elastic behaviour of solution cross-linked poly(isobutylene) gels under large compression

İnci, Mehmet Naci and Erman, Burak and Okay, O. and Durmaz, S. (2001) Elastic behaviour of solution cross-linked poly(isobutylene) gels under large compression. Polymer, 42 (8). pp. 3771-3777. ISSN 0032-3861

Full text not available from this repository.

Official URL: http://dx.doi.org/10.1016/S0032-3861(00)00789-8

Abstract

Modulus of elasticity of loosely cross-linked poly(isobutylene) gels are measured under large compressive deformations. Gels of perfect spherical shape are prepared by the suspension cross-linking technique of dilute toluene solutions of butyl rubber using sulfur monochloride as a cross-linking agent. Compressive deformation is applied by a calibrated stainless steel cantilever to spherical poly(isobutylene) beads of sizes ca. 1.0-4.0 mm in diameter swollen in toluene. The relationship between force and deformation is obtained by using the constitutive relations from molecular theory of elasticity Moduli are measured immediately after applying compression, and after full relaxation which obtains after solvent exudes the gels under compression. The instantaneous moduli are an order of magnitude larger than equilibrium moduli. Results of mechanical measurements, which are presently of a preliminary type, are compared with those from independent thermodynamic estimates of shear moduli.

Item Type:Article
Uncontrolled Keywords:poly(isobutylene) gels; suspension cross-linking; elastic modulus
Subjects:Q Science > Q Science (General)
ID Code:14289
Deposited By:Burak Erman
Deposited On:09 Nov 2010 12:52
Last Modified:25 May 2011 14:09

Repository Staff Only: item control page