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环氧云铁与聚氨酯涂层间剥离原因分析 被引量:1
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作者 沈志聪 杨华 +1 位作者 石文明 吴贤官 《装备环境工程》 CAS 2016年第4期143-148,共6页
目的剖析沿海某大型工程钢结构环氧云铁与聚氨酯涂层间剥离的原因。方法采用质谱分析仪剖析该聚氨酯涂料的成分,采用离子色谱仪及电导率仪检测所形成聚氨酯氟碳涂膜表面的铵基盐分,环境扫描电镜对剥离涂膜表面观察。结果聚氨酯涂料中含... 目的剖析沿海某大型工程钢结构环氧云铁与聚氨酯涂层间剥离的原因。方法采用质谱分析仪剖析该聚氨酯涂料的成分,采用离子色谱仪及电导率仪检测所形成聚氨酯氟碳涂膜表面的铵基盐分,环境扫描电镜对剥离涂膜表面观察。结果聚氨酯涂料中含有高沸点溶剂三甲苯、四甲苯,在聚氨酯氟碳复合涂膜与环氧云铁界面之间存在铵基盐物质,通过电镜微观观察发现涂膜固化不完全和微孔存在。结论聚氨酯氟碳涂膜发生可剥离的原因有以下方面,由于聚氨酯涂料中含有高沸点溶剂,挥发时在涂膜中形成微孔;环氧云铁由于低温下环氧固化反应滞缓,与环境中的CO2,H2O反应,生成了氨基甲酸铵盐;氨基甲酸盐在海洋环境下形成水溶物,富集于环氧云铁涂膜和聚氨酯涂膜相粘结的界面处,降低了附着力,从而产生聚氨酯氟碳涂膜严重可剥离现象。 展开更多
关键词 聚氨酯氟碳涂膜 环氧云铁涂膜 界面粘附力 涂膜微孔
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Surface Modification of Polyethylene Terephthalate(PET) Fiber by Roll-to-Roll Treatment in Atmospheric Ar/O_2 Dielectric Barrier Discharge(DBD) Plasma 被引量:2
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作者 李嘉灵 林捷 +3 位作者 刁颖 胡倩倩 张菁 徐金洲 《Journal of Donghua University(English Edition)》 EI CAS 2011年第1期88-92,共5页
In this work,polyethylene terephthalate(PET) fibers were continuously treated by atmospheric dielectric barrier discharge(DBD) in Ar mixed O2 plasma,and the discharge was characterized by electrical function and optic... In this work,polyethylene terephthalate(PET) fibers were continuously treated by atmospheric dielectric barrier discharge(DBD) in Ar mixed O2 plasma,and the discharge was characterized by electrical function and optical diagnostics.It is found that the interfacial adhesion strength between treated PET fiber and resorcinol formaldehyde latex(RFL)(little)-rubber was improved(about 50%) by the measurement of interfacial shear strength(IFSS) and peel test.The wettability was improved rapidly in the initial treatment time.It is considered that oxidation chemical reaction as the major role of PET fiber surface modification is ahead of the physical etching effect.The high density of atomic oxygen in the plasma by optical emission spectroscopy supports the purpose.According to the scanning electron micrograph(SEM) image in the work,the longer treatment time obviously caused physical etching effect,which shall be less responsible for the improvement of the wettability. 展开更多
关键词 atmospheric pressure plasma polyethylene terephthalate(PET) fiber interfacial shear strength(IFSS) adhesion strength gas analyzer
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