文献类型：期刊文献

中文题名：超声引发自由基聚合制备聚苯乙烯磺酸钠接枝炭黑

英文题名：PREPARATION OF POLY (SODIUM 4-STYRENESULFONATE) GRAFTED CARBON BLACK via ULTRASONIC IRRADIATION INITIATED RADICAL POLYMERIZATION

作者：周晓军[1];李秋影[1];吴驰飞[1]

机构：[1]华东理工大学材料科学与工程学院高分子合金研究室,上海200237

年份：2008

卷号：18

期号：4

起止页码：366

中文期刊名：高分子学报

外文期刊名：Acta Polymerica Sinica

收录：CSTPCD;;Scopus;北大核心:【北大核心2004】；CSCD:【CSCD2011_2012】；

基金：上海市科委纳米专项(项目号0452nm069)资助项目

语种：中文

中文关键词：炭黑;超声;自由基聚合;接枝;分散

外文关键词：Carbon black, Ultrasonic, Radical polymerization, Grafting, Dispersion

摘要：通过在超声环境下,单体苯乙烯磺酸钠发生自由基聚合,生成的聚合物长链自由基被炭黑表面捕获,制备聚合物接枝炭黑.借助红外光谱、热重、粒度、透射电镜和zeta电位分析对该接枝炭黑进行表征.同时研究超声条件对接枝率的影响.结果表明,单体聚合并接枝到炭黑表面,同时炭黑的附聚体和一些大的聚集体结构被超声破碎,平均粒径大为减小;在300W超声波输出功率下,反应1h后,接枝率达到12.8%并趋于稳定.由于接枝分子链上磺酸基的存在,接枝炭黑在水中的分散稳定性显著改善.
To improve the dispersion stability of carbon black in water, the grafting of water-soluble polymer poly-（sodium 4-styrenesulfonate） （PSS） onto carbon black （CB） was achieved by the radical polymerization of the corresponding monomers in the presence of CB under ultrasonic irradiation. This technique could generate efficient polymerization of sodium 4-styrenesulfonate （NaSS） in the presence of CB in a rapid reaction at relatively low temperature. The grafted amount of polymer on CB was assessed by thermogravimetric analysis （TGA）. In addition,molecular weight and molecular weight distribution of the un-grafted polymer was tracked by gel permeation chromatography （GPC）. The influences of ultrasonic time and power output on grafting ratio were also investigated. Fourier transform infrared spectroscopy （FT-IR） was used to determine the chemical structure of the resulting products. Particle analysis indicated that the diameters of the obtained grafted carbon black （GCB） particles were smaller than those of original CB particles. TEM photographs showed that PSS were attached on the surface of carbonblack, and the conglomeration degree of GCB decreased apparently. The results of zeta potential measurements revealed that the GCB surface had more negative charges than the original CB. Accordingly, UV transmission measurements conformed that the dispersion stability of GCB in water was improved apparently than that of initial CB. Because of the attachment of polyelectrolyte to the CB surface the grafted CB could be well dispersed in water.