| Summary: | 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.
|
|---|
