New Filler Types For Hnbr Based Composites

In this paper the preparation and properties of HNBR/MWCNT composites andHNBR/StronWi^TMKTC composites as well as the HNBR/Silica/Aramid Fibercomposites were investigated. Firstly, the best approach was optimized for thepreparation of HNBR/MWCNT composites. On this basis, the effect of the contentsand types of MWCNT on the mechanical properties, thermal stability and dynamicproperties of composites were investigated. The reinforcing performance of MWCNTand carban black at the same volume fraction was compared. The effect of StronWi^TMKTC contents and its combination rate with MWCNT on the properties of compositeswere studied. The effect of the contents of silica on the properties ofHNBR/Silica/Aramid Fiber composites was preliminarily explored. Thecharacterization methods FTIR,SEM and TGA were used. The experimental resultsshow that:The two-roll mill method was the best technique to prepare the HNBR/MWCNTcomposites, since this method provided the largest reinforcement factor and had theleast amount of extractable MWCNT from the composites. With the increasingamounts of MWCNT, the Payne effect and loss factor were increased, however, theprocessing performance becomes poor （higher modulus and compound viscosity）, thescorch time shorter, and the tensile strength and tear strength of the vulcanizatesincreased. Comprehensive analysis of the compound properties indicated that theamount of MWCNT used in HNBR should be no more than30phr. For different typesof MWCNT, the higher of the surface activity, the shorter scorch time, the higher theMDR torque value, the higher the Mooney viscosity and the better of the mechanical properties of resulting composites. The loss factor was also found to increase slightly.Comparison of the carbon black and the MWCNT at the same volume fraction showedthat MWCNT composites obtained higher torque, higher reinforcement factor andshorter scorch time. Mechanical properties and high temperature oil resistance are alsohigher than carbon black composites （100%Modulus increased by350%than carbonblack composites; elongation at break was reduced by40%）.（2） The StronWi^TMKTC analysis shows that, with the increasing amounts ofStronWi^TMKTC, the loss factor had little change, thermal stability were improved.Tensile strength first increases, then decreases, and compression set was first reducedthan increased. The comprehensive performances of composites were better whenStronWi^TMKTC contents were20phr. SEM analysis showed that StronWi^TMKTC wasmore evenly dispersed in HNBR matrix, and became oriented during the pullingprocess, which improved the tensile strength of the material. With the combination ofStronWi^TMKTC and the MWNT1020the mechanical properties of composite were notsignificantly improved, but the loss factor became smaller.（3） Silica contents analysis shows that, with the increasing amount of silica, thescorch time and optimum cure time reduced but （MH-ML） increased; Mechanicalproperties were first increased, then decreased; DIN abrasion were first reduced, thanincreased. The orientation of aramid fiber in the rolling direction is obvious. From thecomprehensive analysis, the optimum content of silica was30phr.