CHAPTER 1 - Universiti Malaysia Pahang

Below follows a list of abbreviations and concepts that needs to be defined and
clarified. These concepts will be used throughout the paper and therefore it is
important to explain how they will be used to prevent misinterpretations as well as
increase the understanding of the paper.
a) Matrix phase of fibre-reinforced composites serves several functions.
First, it binds the fibres together and acts as a medium by which an
externally applied stress is transmitted and distributed to the fibres; only a
very small proportion of an applied load is sustained by the matrix phase.
Secondly, the matrix protects the individual fibres from surface damage
as a result of mechanical abrasion or chemical reactions with the
environment. Finally, the matrix separates the fibres and, by virtue of its
relative softness and plasticity, prevents the propagation of brittle cracks
from fibre to fibre.
b) Filler is an inert material added to a polymer to improve its properties
and/or to reduce its cost. On being mixed with the polymer resin, it forms
a heterogeneous mixture which can be molded under the influence of heat
or pressure.
c) Bagasse Pith is derived from the core of the sugarcane stalk and consists
mainly of parenchyma material.
d) Bagasse Rind surrounds the core of the sugarcane stalk and is largely
derived from sclerenchyma material
e) Extrusion is the molding of a viscous thermoplastic under pressure
through an open-ended die. In this research however the extrusion process
also provides a means for the compounding of the natural fibre into the
polymer matrix. A set of twin screws propels through a chamber into
which the polymer pellets and fibre are fed. The polymer pellets are
melted by a series of heaters, the propelling screws act as a blending
medium for the compounding of the plastic and fiber. Extrusion takes
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