Specific Nonlinear Viscoelasticity Behaviors of Natural Rubber and Zinc Dimethacrylate Composites Due to Multi-Crosslinking Bond Interaction by Using Rubber Process Analyzer 2000

In this paper, the dynamic mechanical properties of the natural rubber (NR) which was filled with in situ zinc dimethacrylate (ZDMA) were investigated using a Rubber Process Analyzer (RPA2000). A weak rigid filler-filler network was formed in the uncured NR/ZDMA compounds. Pronounced Payne effect and stress-softening behavior were observed in the vulcanizates, which indicated that a strong and special filler structure was formed after vulcanization. However, an ionic network might be formed with a high ZDMA loading, which was not favorable to rebuild the poly-ZDMA network. Finally, two tentative regions of networks deformation during the dynamic strain sweep were discussed: filler-filler and ionic bonds dominating region and rubber network dominating region. POLYM. COMPOS., 32:1593-1600, 2011. (C) 2011 Society of Plastics Engineers