SANDIA REPORT SAND2005-7357 Unlimited Release Printed January 2006 Constitutive Models for Rubber Networks Undergoing Simultaneous Crosslinking and Scission Joanne Budzien, David Chi S. Lo, John G. Curro, Aidan P. Thompson, Gary S. Grest, and Dana Rottach Prepared by Sandia National Laboratories Albuquerque, New Mexico 87185 and Livermore, California 94550 Sandia is a multiprogram laboratory operated by Sandia Corporation, a Lockheed Martin Company, for the United States Department of Energy’s National Nuclear Security Administration under Contract DE-AC04-94AL85000. Approved for public release; further dissemination unlimited.