The Effect Of Crystallinity On The
Mechanical Properties Of Plain Woven Carbon
Reinforced Composites Using Polypropylene
Author(s)
H. Katogi & K. Takemura
Abstract
In this study, the effect of crystallinity on the mechanical properties of carbon
fiber reinforced thermoplastics (CFRTP) was investigated. Plain woven carbon
fiber was used as reinforcement. Polypropylene (PP) and maleic anhydride
modified polypropylene (MAPP) were used as a matrix. The crystallinity of PP
was controlled by using heat treatment after hot press molding of CFRTP. The
range of crystallinity of PP and MAPP were from 26% to 40%. Flexural and izod
impact tests of CFRTP were conducted based on Japanese Industrial Standard
(JIS) K 7074 and K 7110, respectively. And double-notched test of CFRTP was
conducted. Crystal morphologies of single carbon fiber added thermoplastics
were observed by using polarization microscope. As a result, flexural strength
and izod impact the value of CFRTP using PP increased with an increase of
crystallinity. Flexural strength and izod impact value of CFRTP using MAPP
almost did not change with an increase of crystallinity. But interfacial shear
strength of CFRTP using MAPP increased with an increase of crystallinity.
Crystallizations of PP and MAPP occurred around carbon fiber after heat
treatment. Therefore, interfacial adhesion between fiber and resin increased with
an increase of crystallinity.
Keywords: carbon fiber, PP, MAPP, flexural property, interlaminar shear
strength, crystallinity.
Keywords
carbon fiber, PP, MAPP, flexural property, interlaminar shear
strength, crystallinity.
Related Book
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