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时间:2019-11-01
《酰胺型聚羧酸系减水剂的合成研究_冯中军》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、2014年第2期(总第292期)混凝土原材料及辅助物料Number2in2014(TotalNo.292)ConcreteMATERIALANDADMINICLEdoi:10.3969/j.issn.1002-3550.2014.02.017酰胺型聚羧酸系减水剂的合成研究1,211,21,21冯中军,孔凡桃,邓最亮,傅乐峰,俞明辉(1.上海三瑞高分子材料有限公司,上海200237;2.上海建筑外加剂工程技术研究中心,上海200237)摘要:制备了一种酰胺型聚羧酸系减水剂,研究了主链分子量、主链组成以及侧链接枝密度对其减水保坍性能的影响,通过FTIR、GPC对其结构进行了表征
2、,最后与聚羧酸醚(AA/HPEG共聚物)、聚羧酸酯(MAA/MPEGMA共聚物)等两类聚羧酸系减水剂进行了性能对比。结果表明:主链分子量约4000、主链组成是摩尔比AA/MAA=3∶1的共聚物、侧链接枝密度为20%的酰胺型聚羧酸系减水剂综合性能最好,其混凝土减水率、坍落度保持和抗压强度等性能均优于聚羧酸醚和聚羧酸酯两类减水剂。关键词:酰胺型;聚羧酸;减水剂;高减水率;坍落度保持;外加剂中图分类号:TU528.042.2文献标志码:A文章编号:1002-3550(2014)02-0064-04Studyonthepreparationofamidetypepolycarbox
3、ylatesuperplasticizerFENGZhongjun1,2,KONGFantao1,2,DENGZuiliang1,2,FULefeng1,2,YUMinghui1(1.ShanghaiSunrisePolymerMaterialCompanyLimited,Shanghai200237,China;2.ShanghaiEngineeringResearchCenterofBuildingAdmixture,Shanghai200237,China)Abstract:Anamidetypepolycarboxylatesuperplasticizerwassy
4、nthesized.Theeffectofmain-chainmoleculeweight,thecomponentsofbackboneandthegraftingdensityofsidechainontheabilityofwaterreductionandslumplossresistantpropertywereinvestigated.Thestructureofamidetypepolycarboxylatesuperplasticizerwascharacterizedbyfouriertransforminfraredspectroscopy(FTIR)a
5、ndgelper-meationchromatography(GPC).Finally,thecomparisonwasmadeontheperformanceofthesyntheticamidetypepolycarboxylatesu-perplasticizer,polyethertypepolycarboxylatesuperplasticizer(AA/HPEGcopolymer)andpolyestetypepolycarboxylatesuperplasticizer(MAA/MPEGMAcopolymer).Theresultshowedthatthesy
6、ntheticamidetypepolycarboxylatesuperplasticizerhadthebestcomprehen-siveperformancewhenthemain-chainmoleculeweightwasabout4000,themolarratioofacrylicacid(AA)tomethacrylicacid(MAA)ofbackbonewas3∶1andthegraftedsidechaindensitywas20%.Meanwhile,thisamidetypepolycarboxylatesuperplasticizerhadabe
7、tterper-formanceonwater-reducingrate,slump-retainingabilityandcompressivestrengthforconcretecomparewiththepolyethertypeandpolyestertypepolycarboxylatewaterreducer.Keywords:amidetype;polycarboxylicacid;waterreducer;highwater-reducingrate;slump-retaining;admixtu
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