应用化工
應用化工
응용화공
APPLIED CHEMICAL INDUSTRY
2015年
6期
1029-1032,1036
,共5页
N-氨基甲酰马来酸%甲基丙烯酸磺酸钠%Zeta 电位%作用机理%减水剂
N-氨基甲酰馬來痠%甲基丙烯痠磺痠鈉%Zeta 電位%作用機理%減水劑
N-안기갑선마래산%갑기병희산광산납%Zeta 전위%작용궤리%감수제
N-carbamoylmaleamic acid%sodium methylallyl sulfonate%Zeta potential%action mecha-nism%superpla-sticizer
以过硫酸铵( APS)为引发剂,N-氨基甲酰马来酸( NCMA)、聚乙二醇单烯丙基醚( APEG)和甲基丙烯磺酸钠( SMAS)为聚合单体,合成 N-氨基甲酰马来酸-甲基丙烯磺酸钠-聚乙二醇单烯丙基醚( SP )。通过 FTIR 和1 H NMR谱图对SP结构进行表征。以净浆流动度为指标,考察了引发剂用量、反应温度、SMAS/APEG摩尔比和NCMA/APEG摩尔比对净浆流动度的影响,并以净浆流动度、Zeta电位和吸附量为指标,探讨了酰胺型聚羧酸系减水剂与水泥的作用机理。试验结果表明,最佳反应条件为SMAS/APEG摩尔比1.2,NCMA/APEG摩尔比1.0,引发剂用量0.4%(质量分数)和反应温度为50℃；其分散机理主要是由于减水剂分子中的阴阳离子基团与水泥颗粒表面形成物理吸附,使水泥颗粒之间产生了立体斥力而产生分散作用。
以過硫痠銨( APS)為引髮劑,N-氨基甲酰馬來痠( NCMA)、聚乙二醇單烯丙基醚( APEG)和甲基丙烯磺痠鈉( SMAS)為聚閤單體,閤成 N-氨基甲酰馬來痠-甲基丙烯磺痠鈉-聚乙二醇單烯丙基醚( SP )。通過 FTIR 和1 H NMR譜圖對SP結構進行錶徵。以淨漿流動度為指標,攷察瞭引髮劑用量、反應溫度、SMAS/APEG摩爾比和NCMA/APEG摩爾比對淨漿流動度的影響,併以淨漿流動度、Zeta電位和吸附量為指標,探討瞭酰胺型聚羧痠繫減水劑與水泥的作用機理。試驗結果錶明,最佳反應條件為SMAS/APEG摩爾比1.2,NCMA/APEG摩爾比1.0,引髮劑用量0.4%(質量分數)和反應溫度為50℃；其分散機理主要是由于減水劑分子中的陰暘離子基糰與水泥顆粒錶麵形成物理吸附,使水泥顆粒之間產生瞭立體斥力而產生分散作用。
이과류산안( APS)위인발제,N-안기갑선마래산( NCMA)、취을이순단희병기미( APEG)화갑기병희광산납( SMAS)위취합단체,합성 N-안기갑선마래산-갑기병희광산납-취을이순단희병기미( SP )。통과 FTIR 화1 H NMR보도대SP결구진행표정。이정장류동도위지표,고찰료인발제용량、반응온도、SMAS/APEG마이비화NCMA/APEG마이비대정장류동도적영향,병이정장류동도、Zeta전위화흡부량위지표,탐토료선알형취최산계감수제여수니적작용궤리。시험결과표명,최가반응조건위SMAS/APEG마이비1.2,NCMA/APEG마이비1.0,인발제용량0.4%(질량분수)화반응온도위50℃；기분산궤리주요시유우감수제분자중적음양리자기단여수니과립표면형성물리흡부,사수니과립지간산생료입체척력이산생분산작용。
Polycarboxylate based superplasticizer ( SP ) was prepared from N-carbamoylmaleamic acid (NCMA),sodium methylallyl sulfonate(SMAS) and polyethylene glycol monoallyl ether (APEG) with ammonium persulphate( APS) as initiator. The molecular structure of SP was characterized by FTIR and 1 H NMR. Effects of SMAS/APEG monomer mole ratio,NCMA/APEG monomer mole ratio,the degree of initiator and polymerization temperature were investigated with initial fluidity as measurement index. In or-der to study its action mechanism,the effect of SMAS/NCMA monomer mole ratio was investigated with initial fluidity,Zeta potential and adsorption as measurement index. The result shows that the optimal con-dition were as follows:the monomer mole ratio of SMAS/APEG is 1. 2,the monomer mole ratio of NCMA/APEG is 1 . 0 , the amount of initiator is 0 . 4% according to the mass and the reaction temperature is 50 ℃. In addition,it was suggested that the mechanism of the SP was mainly owing to the steric repulsive force from the physical adsorption between the cationic groups and anionic groups of SP and the surface of cement particles.
