| Summary: | To investigate how plasma treatment affected the surface structure and
adhesion to polypropylene matrix and unsaturated polyester matrix, green
abaca fibers were treated by low temperature plasma under different plasma
processing parameters including treatment time, output power, and working
gas. Abaca fibers were characterized by atomic force microscope, X-ray
photoelectron spectroscopy, contact angle and interfacial shear strength.
The results of contact angle and interfacial shear strength were consistent
with the changes in surface roughness and the atomic ratio of the plasma
treated abaca fibers with treatment time, output power, and working gas. It
was concluded that the surface roughness and atomic ratio played a major
role in the adhesion improvement of the plasma treated abaca fibers to
polypropylene matrix and unsaturated polyester matrix due to the mechanical
interlocking and chemical bonding, respectively. The geometrical potential
theory was adopted to elucidate the mechanism of the adhesion property.
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