CAJ | 학술논문

以甲基丙烯酸(MAA)、2-丙烯酰胺-2-甲基丙磺酸(AMPS)、甲基丙烯酸羟乙酯(HEMA)以及马来酸酐(MA)为单体,采用反应活性较低的衣康酸(IA)作为分子量调节剂,共聚得到 MAA-AMPS-HEMA-MA 四元聚合物,再将共聚物与碳酸钙包覆剂硬脂酸钠进行复配得到复配分散剂.以四元聚合物合成工艺作为研究对象,考察了单体比例和 IA 浓度对四元聚合物分子量的影响;再以复配分散剂应用性能作为研究对象,用 Brookkfield DV-Ⅱ+可编程黏度计和扫描电镜等仪器测定不同分子量的复配分散剂对造纸涂料碳酸钙的分散性能的影响,对分散后颗粒表面形态进行表征.结果表明,单体摩尔配比(MAA:AMPS:HEMA:MA)为4:1:1:1、IA:MAA 为2:8,聚合物与硬脂酸钠按质量比5:1进行复配,所得到的复配分散剂对碳酸钙分散效果较好.复配分散剂的最佳用量为0.8%,此时浆钙分散体系黏度降至68.4 mPa?s(未加分散剂的浆钙黏度412.4 mPa?s).
이갑기병희산(MAA)、2-병희선알-2-갑기병광산(AMPS)、갑기병희산간을지(HEMA)이급마래산항(MA)위단체,채용반응활성교저적의강산(IA)작위분자량조절제,공취득도 MAA-AMPS-HEMA-MA 사원취합물,재장공취물여탄산개포복제경지산납진행복배득도복배분산제.이사원취합물합성공예작위연구대상,고찰료단체비례화 IA 농도대사원취합물분자량적영향;재이복배분산제응용성능작위연구대상,용 Brookkfield DV-Ⅱ+가편정점도계화소묘전경등의기측정불동분자량적복배분산제대조지도료탄산개적분산성능적영향,대분산후과립표면형태진행표정.결과표명,단체마이배비(MAA:AMPS:HEMA:MA)위4:1:1:1、IA:MAA 위2:8,취합물여경지산납안질량비5:1진행복배,소득도적복배분산제대탄산개분산효과교호.복배분산제적최가용량위0.8%,차시장개분산체계점도강지68.4 mPa?s(미가분산제적장개점도412.4 mPa?s).
The quadripolymer dispersants were synthesized with methacrylic acid (MAA), maleic anhydride (MA), 2-acrylamide-2-methylcsulfonic acid (AMPS) and hydroxyethyl methacrylate (HEMA) as monomers, itaconic acid (IA) as molecular weight regulator, which were then composited with sodium stearate. The influences of monomer ratio, temperature, initiator concentration and IA concentration on the molecular weight of the synthesized quadripolymer dispersants were studied firstly. Then the dispersant capacities of the quadripolymers and their mixtures with sodium stearate were characterized by Brookfield rotary viscometer and scanning electron microscope. The experiment results show that the mixture with polymer/sodium stearate mass ratio of 5/1 and the polymer prepared with molar ratio of the monomers MMA:AMPS:HEMA:MA=4:1:1:1 and W(IA)/W(MMA)=2:8 exhibits good dispersive performance for the dispersal of calcium carbonate system, its suitable used amount is 0.8%(w/w), and the viscosity of the calcium carbonate system could be decreased from 412.4 mPa·s to 68.4 mPa?s