The Modification Of The Oligo-phenol Hybrid On Polymer Damping Materials

Polymer hybrid damping materials with high tan δ value and widetemperature range have drawn a lot of attention in recent years, and thedamping peak of the matrix can be controlled with the addition of theorganic additives, which display excellent damping properties, meeting therequirements of the surrounding environment perfectly.In this article, Nitrile Butadiene Rubber （NBR）, Acrylate Rubber （AR）and Chlorinated Butyl Rubber （CIIR） were mixed as matrix, the dampingproperties were studied with the addition of oligo-phenol produced byreacting of4-methyl-phenol with dicyclopentadiene and isobutylene（MPDI） and Phenolic Resin （PF）. Series composites were also prepared byaddition of mica （M）, vermiculite （VMT）, carbon black （C）, and calciumcarbonate （Ca）, and the properties were also characterized by DMA, DSC,FT-IR, and SEM.It was found that MPDI could form hydrogen bond with AR, NBR andCIIR. The tan value was increased and the damping peak was broadenedwith the addition of MPDI. MPDI was prone to distribute in AR and NBRcomponent compared with CIIR due to the different polarity between them.This selective distribution phenomenon caused the T_g of AR and NBR shifted to higher temperature, while the T_g and T_ll of CIIR kept almostunchanged. The temperature range was broadened orientedly toward highertemperature. Specially, the temperature range of AR/CIIR/MPDI （30/70/10）reached to100.2oC with tanδ>0.3.The tan value of NBR and CIIR increased and the temperature rangewere broadened with the addition of PF, because of the formation ofhydrogen bond between them. In the composites of NBR/CIIR/PF, PFdistributed mainly in NBR component, broadening the temperature range.phenolic resin （PF1） can improve the damping properties of matrix muchmore obviously compare with para-tert-butyl phenolic resin （PF2）, but theTgand tan value of NBR decreased with the addition of nonyl phenolicresin （PF3）.Mica and vermiculite with layered structure could increase the lossmodulus of polymer matrix greatly, and shift the damping peak slightly tohigher temperature. The modulus and loss modulus of NBR/PF （100/40）were increased with the addition of Mica and vermiculite, and the dampingproperties in high temperature range were improved significantly aftervulcanization.