TGA和DSC分析发泡剂对NBR橡胶发泡性能的影响  

Research on the effect of foaming agent on foaming properties of NBR by TGA and DSC

作　　者：曹沛[1] 梁坤[1] 王雪丽[1] 孙仙平 高其瑞 刘莉[1] 

机构地区：[1]青岛科技大学高分子科学与工程学院,山东青岛266042 [2]上海品胜化工有限公司,上海201611 [3]青岛信诺化工有限公司,山东青岛266109

出　　处：《弹性体》2012年第1期29-34,共6页China Elastomerics

基　　金：校企合作项目;已实现产业化

摘　　要：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)、NaHCO34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。In this paper, decomposition characteristics of different foaming agents including AC, H, OBSH, NaHCO3 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 in- fluence 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.

关 键 词：NBR 硫化体系 发泡体系 

分 类 号：TQ333[化学工程—橡胶工业]