Abstract:

For making damping materials with broader zone of temperature and frequency, extending the damping functional zone of chlorinate butyl rubber to higher temperature, interpenetrating polymer network（IPN）is produced based on chlorinate butyl rubber mixed with poly（methyl）acrylate (PMAC). The dynamic mechanical analysis shows the IPN has higher damping value when PEA serves as the second composition, but its damping functional area is narrower; the IPN has broader damping functional region when the second composition is PBMA, its damping temperature zone with damping factor tan δmax≥0.3 spans across from -45℃ to 57℃. The microstructures of IPN are characterized by 13CNMR, FTIR and TEM. These results show that the IPN forms a dual phase continuity interlocked structure.

Key words: chlorinate butyl rubber, interpenetrating polymer network（IPN）, poly（methyl）atacryle, damping, microstructure, dissipation coefficient