In this article, the clamping properties of organic hybrids consisting of chlorinated polyethylene (CPE), N,N-dicyclohexyl-2-benzothia-zolysufenamide (DZ), and 4,4'-thio-bis(3-methyl-6-tert-butylphenol) (BPSR) have been investigated by dynamic mechanical analysis (DMA). It is found that DZ and BPSR seem to have a synergistic effect on the damping improvement of CPE/DZ/BPSR hybrids. For CPE/DZ/BPSR three-component hybrids, when BPSR content is below 20 wt %, the values of damping peak maximum are just the same, while the damping peak position shifts to a higher temperature at a higher BPSR concentration. When BPSR content is fixed at 10 wt %, the damping peak maximum increases with increasing DZ/CPE ratio, while there is little shift in the peak position within the ratio range of 0.75-1.25. The decrease in damping peak maximum against nealing can be attributed to the phase separation resulting from the crystallization of hybrids components. Such a crystalline phase, which has been formed during annealing, contains not only pure DZ crystallites but also some CPE-DZ or CPE-DZ-BPSR eutectic crystals. Furthermore, the damping stability of the hybrids can be improved excellently by adding a small amount of BPSR or changing hot-pressing temperature. These may imply that a series of high-performance damping materials possessing both high clamping peak maximum and controllable damping peak position can be achieved. (c) 2006 Wiley Periodicals, Inc.