Study of the orientation-controlled damping temperature based on selective distribution of oligo-phenol in acrylate rubber/chlorinated butyl rubber blends

In this paper, a series of composites containing of the oligo-phenol (produced by reacting of 4-methyl-phenol with dicyclopentadiene and isobutylene (MPDI)) as organic fillers, and chlorinated butyl rubber (CIIR)/acrylate rubber (AR) as matrix were prepared by melting blending method. The selective distribution phenomenon of organic fillers in the matrix and the damping properties of AR/CIIR/MPDI composites were characterized by DMA, DSC, FT-IR and SEM, respectively. The results showed that MPDI could form hydrogen bond with AR more easily than with CIIR, which resulted in MPDI dispersing preferentially in AR phase in CIIR/AR composites. And the selective dispersion of MPDI caused that the damping temperature range was orientedly broadened towards the high temperature. Specially, with the content of MPDI increased to 10 wt% in AR/CIIR marix, only the Tg of AR in AR/CIIR composites shifted to higher temperature, which reached to 55.2 degrees C, while the Tg and Tll of CIIR in AR/CIIR composites kept almost unchanged. Otherwise, the temperature range of AR/CIIR/MPDI was expanded to 100.2 degrees C with the tan d > 0.3. Therefore, it was expected as a promising way to orientedly broaden damping temperature range according to the selective distribution of organic additives in binary systems. POLYM. COMPOS., 2012. (C) 2012 Society of Plastics Engineers