The Study of Modified Carbon/Epoxy Composites by Electrochemical Copolymerization Coating Technique

• Main Authors: Lee, hsin chang, 李欣昌
• Other Authors: Wu, ching shiun
• Format: Others
• Language: zh-TW
• Published: 1994
• Online Access: http://ndltd.ncl.edu.tw/handle/72161805936938043181

碩士 === 逢甲大學 === 紡織工程研究所 === 82 === The primary concern of this paper is the modification of composites to introduce a polymer interlayer between fiber and matrix by electrochemical copolymerization technique, expecting to improve the impact strength and interlaminar shear strength of carbon fiber/epoxy composites by the polymer interlayer. The physical and chemical property of polymer interlayer can be controlled by electrochemical copoloymerization system.Microbond technique has been applied to measure the interfacial shear strength(τ).In order to make the pull-out measurement property, the length of embedded fiber must be controlled between 40 to 150um. τ of Acrylonitrile/Methyl acrylate and Glycidyl acrylate / Methyl acrylate coated fiber have improvement compared to the uncoated fiber. Experimental result show that Acrylonitrile / Methyl acrylate copolymer interlayer improve the impact strength of composites clearly, but can't increase the interlaminar shear strength simultaneously. Glycidyl / Methyl acrylate copolymer interlayer can improve the impact strength and interlaminar shear strength simultaneously. Furthermore, this study combine electrochemical copolymerization technique and the concept of intermittence to introduce Glycidle acrylate / Methyl acrylate interlayer intermittently on fiber and the impact strength and interlaminar shear strength of composites from these coated fibers were examined. Intermittent coating interlayer can increase the impact strength of composites and maintain the interlaminar shear strength. The interlayer of 50% coating can increase 16% impact strength of composites. Therefore,it is very useful that controlling the physical and chemical property of interlayer by electrochemical copolymerization technique to improve mechanical property of composites.