Abstract: The glass transition temperatures (T_g) and damping properties of different blends consisting of 1,1,3-tris (2-methyl-4-hydroxy-5-tert-butyl) butane (CA) containing three hindered phenolic hydroxyl groups and various acrylic polymers were investigated in this paper.The results showed that the intramolecular hydrogen bonding of CA was much weaker than the intermolecular one between acrylic polymer and CA.The small molecule had good dispersion stability in the polymer.There probably existed extra hydrogen bonding between the methoxyl and phenolic hydroxyl groups besides that between the carbonyl and the hydroxyl groups in hybrids which contained methoxyl groups.The dynamic mechanical analysis (DMA) results showed that the damping properties were improved by the addition of CA.Upon increasing the ratio of methoxyl in the polymer structure,the improvement of damping properties became more and more significant.Among them,the poly(methoxyethyl acrylate) hybrid (POEA/CA) showed the best.Accordingly,in the case of the same small molecule,more hydrogen bondings led to better damping properties.