2000 Volume 56 Issue 9 Pages 443-448
Damping behavior of organic hybrid damping materials prepared from a mixture of chlorinated polyethylene (CPE) and N, N′-dicyclohexyl-2-benzothiazolylsulfenamide (DBS) was investigated by means of dynamic mechanical analysis. DBS content dependence on the damping behavior can be divided into two characteristic regions. At contents lower than 66wt%, the maximum value of loss modulus and loss tangent increase linearly with DBS content; however, at contents higher than that value, they become nonlinear. Temperature dependence of loss tangent shows that there are two loss peaks for the highly filled mixtures. The first peak is broad with tan δ of about 5∼10, while the second peak is rather sharp at high temperature with tan δ>10. By differential scanning calorimetry (DSC), the crystallization peak was observed only for the highly filled mixture. The finding that incorporation of a small amount of CPE into DBS matrix can improve the DBS crystallinity is very important for the development of novel hybrid materials.
