摘要
利用异氰酸酯和聚醚氨通过快速混合生成聚脲,具有工艺环保、性能稳定的优点。考察了聚醚氨种类和聚醚氨配比对聚脲固化速度和性能的影响,并对黏度和力学性能进行测试。通过红外光谱、扫描电镜、热重和电化学工作站(EIS、Tafel)等方法对聚脲形貌结构进行表征和对耐腐蚀性能进行测试。结果表明:当以聚醚氨(重均分子量Mw=2000)、聚醚多元胺(Mw=5000)、环氧树脂固化剂(Mw=400)、二乙基甲苯二胺(Mw=100)和N,N-二烷基甲基二胺(Mw=6200)为原料、质量比为2.6∶1.4∶2∶1.8∶2.2时得到的聚脲固化速度最快、热稳定性良好、成膜连续外观光亮、硬度大于邵氏硬度50D、拉伸强度大于20MPa、断裂伸长率大于245%、撕裂强度大于20/(kN·m)、涂覆聚脲的板具有优良的耐腐蚀性。
Using isocyanate and polyurethane to produce polyurethane by rapid mixing has the advantages of environmental protection and stable performance.The effects of the type of polyurethane and the ratio of polyurethane on curing speed and properties of polyurethane,as well as the determination of viscosity and mechanical properties were investigated.The morphological structure and corrosion resistance of polyurea were tested by FT-IR,SEM,TGA,electrochemical workstation(EIS,Tafel).The results showed that,When polyether ammonia(Mw=2000),polyether polyamine(Mw=5000),epoxy resin curing agent(Mw=400),diethyl toluene diamine(Mw=100),N,N-dialkyl methyl diamine(Mw=6200)used as raw materials,the curing speed of polyurea obtained by the mass ratio of 2.6∶1.4∶2∶1.8∶2.2 was the fastest,the thermal stability was good,film forming continuous appearance was bright,the hardness was greater than shaoshi 50 D,the tensile strength was greater than 20 MPa,breaking elongation was greater than 245%,and tearing strength was greater than 20/(kN·m).The plate coated with polyurea had excellent corrosion resistance.
作者
房鑫
徐英男
侯传金
刘彦军
Fang Xin;Xu Yingnan;Hou Chuanjin;Liu Yanjun(School of Light Industry and Chemical Engineering,Dalian Polytechnic University,Dalian 116034;Research and Development Department,Dalian Fluripu New Material Co.,Ltd.,Dalian 116000)
出处
《化工新型材料》
CAS
CSCD
北大核心
2019年第3期203-206,共4页
New Chemical Materials
基金
国家自然科学基金(21403022)
辽宁省高等学校基本科研项目(2017J027)
关键词
聚脲
快速固化
异氰酸酯
聚醚氨
polyurea
rapid curing
isocyanate
polyether ammonia
