含磺酸基单体在炭黑表面接枝共聚合

近年来，炭黑粒子在水性体系中的分散稳定性倍受人们关注。研究认为影响炭黑分散稳定的主要因素为炭黑颗粒之间的相互作用力（包括电磁力、静电排斥力和空间位阻力等）和炭黑粒子与分散介质之间的相互作用力。目前，实现炭黑在水性体系中良好分散所采用的方法主要有炭黑氧化法、分散剂法和炭黑高分子接枝法，其中以炭黑高分子接枝方法效果最佳。

GRAFTING CONTAINING SULFONIC ACID GROUP ONTO CARBON BLACK SURFACE COPOLYMERIZATION OF MONMERS

To increase the dispersion stability of carbon black in water,polymers with sulfonic acid groups were grafted onto the surface of carbon black.Under the effect of ultrasonic wave,sodium allyl sulfonate (SAS) and 2-acrylamido-2-methyl propane sulfonic acid (AMPS) were copolymerized with acrylic acid and grafted onto the surface of carbon black, respectively by means of redox of ceric ion and nitric acid.The copolymerization conditions and dispersion stability of grafted carbon black were discussed in detail.It was found that the introduction of sulfonic acid groups improved the dispersion stability of carbon black in water obviously.It was also noticed that AMPS was easier to copolymerize with acrylic acid compared with SAS. For obtaining the highest grafting percentage,SAS and AMPS both had an optimal quantity when the weight of acrylic acid was constant and the ratios of them to acrylic acid (in weight) were within 0.15～1.0.