有机累托石改性环氧/水性聚氨酯复合膜的制备与性能  

Preparation and properties of organic rectorite modified epoxy/waterborne polyurethane composite film

作　　者：汤中道[1,2] 刘惠芳[3] 卜庭江[1,2] 刘燕[2] 

机构地区：[1]中国地质大学教育部纳米矿物材料及应用工程研究中心,武汉430074 [2]中国地质大学材料科学与化学工程学院,武汉430074 [3]中国地质大学地质过程与矿产资源国家重点实验室,武汉430074

出　　处：《化工新型材料》2010年第12期101-104,共4页New Chemical Materials

摘　　要：以累托石、聚醚二元醇、2,2-二羟甲基丙酸、甲苯-2,4-二异氰酸酯、环氧树脂等为原料,采用原位聚合法制备了有机累托石/环氧/水性聚氨酯(OREC/EP/WPU)复合膜。用XRD、FTIR分析技术对有机累托石和复合膜的结构进行了表征,研究了有机累托石的加入量对OREC/EP/WPU的力学性能和热稳定性影响。加入有机累托石为3%(wt)时,TG-DSC分析表明OREC/EP/WPU的分解温度由286.5℃提高到318.7℃,拉伸试验数据显示拉伸强度和断裂伸长率分别提高33.3%和26.6%。扫描电镜断口形貌分析揭示,OREC/EP/WPU复合膜的断面为韧性断裂。Organic rectorite / epoxy / waterborne polyurethane（OREC/EP/WPU） composite films were prepared by in-situ polymerization from rectorite,polyether diols,2,2-dimethylol propionic acid,toluene 2,4-diisocyanate and epoxy resin.The structures of organic rectorite and composite films were characterized with the XRD and FTIR analysis,and the effect of organic rectorite amount on the mechanical properties and thermal stability of OREC / EP / WPU was discussed.When added organic rectorite to 3% and compared with EP/WPU,TG-DSC analysis showed that the OREC / EP / WPU decomposition temperature increased from 286.5℃ to 318.7℃ and tensile test data showed that the tensile strength and elongation at break increased 33.3% and 26.6%.respectively.SEM analysis revealed that the cross-section of the organic rectorite / epoxy / polyurethane composite films was the ductile fracture.

关 键 词：有机累托石 水性聚氨酯 环氧树脂 热稳定性 

分 类 号：TB383.2[一般工业技术—材料科学与工程]