- 王 靖1,2，劉俊元1,2，孔 韜1,2，查炎鵬1,2，賴振峰1,2，彭 靜1,2
2020年第6期
摘要
引用本文
摘?要：將聚醚三元醇MN-500、EP-330N、MOCA、水發泡劑、勻泡劑、開孔劑、氧化鋁耐磨填料、復合催化劑按比例攪拌均勻后，再與異氰酸酯預聚物混合反應制備了不同硬度和密度的微孔聚氨酯材料。分別研究了硬段含量、水發泡劑對聚氨酯材料密度、硬度和力學性能的影響。結果表明，聚氨酯的拉伸強度和硬度隨著硬段含量的增加而逐步增大，斷裂伸長率則是逐漸下降。隨著水發泡劑用量的提升，材料的拉伸強度從4.1MPa降至1.7MPa，斷裂伸長率從425%降至326%。發泡劑用量為0.10%時，其內部孔徑為0.2～0.5mm。表層經過激光微孔化處理后得到三維微孔聚氨酯材料，具有良好的透水汽性，以此作為模板襯模澆筑出來的混凝土表面致密、光潔平整、均勻，很大程度上減少了蜂窩麻面、砂線和裂紋。Abstract:MicroporouspolyurethanematerialswithdifferenthardnessanddensitywerepreparedbymixingpolyetherMN-500,EP-330N,MOCA,waterfoamingagent,homogenizer,porousagent,wear-resistantfillerofalumina,compositecatalystandisocyanateprepolymerinproportion.Theeffectsofhardsegmentcontentandwaterfoamingagentonthedensity,hardnessandmechanicalpropertiesofpolyurethanematerialswerestudied.Theresultsshowsthatthetensilestrengthandhardnessofpolyurethanegraduallyincreasewiththeincreaseofhardsegmentcontent,whiletheelongationatbreakdecreases.Withtheincreaseoftheamountofwaterfoamingagent,thetensilestrengthofthematerialdecreasesfrom4.1MPato1.7MPa,andtheelongationatbreakdecreasesfrom425%to326%.Whenthedosageoffoamingagentis0.10%,theinnercelldiameteris0.2～0.5mm.Three-dimensionalmicroporouspolyurethanematerialisobtainedafterlasermicroporoustreatment,whichhasgoodwatervaporpermeability.Thesurfaceofconcretepouredwiththismaterialastemplateliningiscompact,smoothanduniform,whichgreatlyreduceshoneycomblinen,sandlineandcracks.
王靖,劉俊元,孔韜,等.三維透氣微孔聚氨酯材料的制備及其在混凝土模具中的應用[J]混凝土與水泥制品,2020(6):86-89.
WANG J,LIU J Y,KONG T,et al.Preparation of Three-dimensional Mocroporous Polyurethane and Its Application in Concrete[J].China Concrete and Cement Products,2020(6):86-89.
