Effect of AO 4426 on damping properties of PVA/CPE-AO 2246

Abstract To investigate the influence of AO 2246 and AO 4426 on the damping properties of polyvinyl alcohol/chlorinated polyethylene (PVA/CPE) composites, a series of composites were prepared by adding AO 4426 into PVA/CPE-AO 2246 under the constant mass ratio of hindered phenol in the composites. The dynamic mechanical properties and microstructure of materials were investigated by DMA, DSC, SEM, and FT-IR. The results showed that a new damping peak appeared near 50 °C by adding AO 4426, which indicated phase separation between AO 4426 and the matrix occurred. With the increase of AO 4426, the damping peaks in the low-temperature section were improved. The value of low-lying region between the double damping peaks, when the hindered phenol coexisted was higher than that of the composites containing only AO 4426, which indicated that the damping temperature domain of the composites was effectively broadened. At the melting temperature of AO 4426 microcrystalline and AO 2246 microcrystalline, no obvious peaks were observed simultaneously, indicating that the hindered phenols inhibited the crystallization of each other.