In this paper, decomposition characteristics of different foaming agents including AC, H, OBSH, NaHCC>3 were researched by TGA and DSC. The results showed during these four kinds of foaming agent,burstiness of the AC and H is better than that of OBSH followed by NaHCO3. Also, foaming auxiliary agent can lower the decomposition temperature obviously,and it has no obvious influence on the decomposition of the foaming agent. When used as foaming agent alone, OBSH showed the best effect. AC and H additives revealed best coordination effect when they were mixed by a ratio of 2 : 1. The density of the foam products decreased gradually with increase of the utility of the foaming agent which was the mixture of AC and H in the ratio of 2 : 1. But,when the percentage of the mixed foaming agent was more than 12%,the density of the products decreased slower.%采用热重分析仪和示差扫描量热分析仪研究了偶氮二甲酰胺(AC)、N,N '-二亚硝基五次甲基四胺(H)、4,4'-氧代双苯磺酰肼(OBSH)、NaHCO3 4种发泡剂的分解特性.发现发泡剂AC与H的分解具有较强的突发性,发泡剂OBSH的突发性较弱,NaHCO3分解的突发性最弱.发泡助剂可以明显地降低发泡剂的分解温度,但是对发泡剂分解的突发性影响不大.发泡剂单独使用时以OBSH为最佳；复配使用时,当AC和H以2∶1的质量比使用时,效果最佳.以添加质量比为2∶1的AC和H复配发泡剂A为研究对象时,丁腈橡胶(NBR)发泡制品密度随发泡剂量的增加而逐渐减小,且当其用量超过12质量份时,密度减小的幅度变小.
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