摘要
首次将超声波降解聚合物原理应用于炭黑的接枝过程中,在超声波和H2O2的共同作用下,使聚乙烯醇(PVA)降解,产生大分子自由基,进而被炭黑表面捕获,实现接枝.考察超声波和H2O2对提高炭黑分散性的贡献,并借助Raman光谱、透射电镜(TEM)等测试手段对接枝炭黑进行了表征.结果表明:聚乙烯醇降解过程中生成的高分子自由基被炭黑捕捉,获得了聚乙烯醇接枝的炭黑,该炭黑具有很好的分散稳定性;超声波对提高炭黑分散性的作用远优于H2O2;接枝炭黑在水中的聚集程度明显降低.
Polyvinyl alcohol(PVA) was degraded by ultrasonic field and H_2O_2,and the rusulted macromolecular radical was captured by carbon black,so grafted carbon black was given.The grafted carbon black is of excellent dispersibility. The contribution of ultrasonic field and H_2O_2 to the enhancement of carbon black's dispersibility was studied respectively. The result suggests that the ultrasonic field is more powerful than H_2O_2. The grafted carbon black was characterized by Raman spectrum and TEM.The images showed that polyvinyl alcohol(PVA) were grafted on the surface of carbon black and the conglomeration degree of grafted carbon black decreased apparently.
出处
《材料科学与工艺》
EI
CAS
CSCD
2003年第4期423-425,共3页
Materials Science and Technology
关键词
聚乙烯醇
炭黑
超声波
分散稳定性
亲水性
carbonblack
polyvinyl alcohol(PVA)
ultrasonic
graft
degrade
