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《Engineering Plastics Application》 2009-05
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STUDY ON SURFACE HYDROPHILICITY AND APPLICATION OF PLASTICS ABRASIVES IN WATER JET TECHNIQUE

Cui Li,Li Zhitao,Wei Wuji,Huang Jian (College of Materials Science and Engineering,Nanjing University of Technology,Nanjing 210009,China)  
The unsaturated polyester resin(UPR)particles used as abrasives in water jet medium were prepared by suspension polymerization. The factors such as content of Al2O3,different types of hydrophilic monomers and content of hydrophilic monomers that influenced the surface hydrophilicity of the abrasives were investigated. The results showed that the water contact angle of the abrasives surface decreased with increasing content of Al2O3; the surface hydrophilicity of abrasives with hydrophilic monomers was improved. Among the hydrophilic monomers ,2-hydroxypropyl methacrylate(HPMA) had the best effect. When 6 phr HPMA,30 phr Al2O3 were added into 100 phr UPR,the water contact angle of the abrasives surface decreased to 24.2°. The abrasives could meet the requirement of water jet technique and they were practically applied in factories.
【CateGory Index】: TQ320.7
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