The Effect of Incorporation of Two Different Fibers on Some Mechanical Properties of Heat Cure Acrylic Resin

Abstract

To evaluate the effect of addition of different fibers on some mechanical
properties of heat cured acrylic resin (flexural strength, impact strength and hardness).
210 specimens were used in the study.70 specimens were used for flexural
strength with measurements (65mm*10mm*2.5mm) length, width and thickness
respectively. The specimens were divided into seven test groups (n=10). The first
group is the Control one and it was without fiber reinforcement, second group
reinforced with 2mm polyester fibers, third group reinforced with 4mm polyester
fibers, fourth group reinforced with 2mm Polypropylene fibers, fifth group reinforced
with 4mm Polypropylene fibers, sixth group reinforced with 2mm of both fibers
(polyester and Polypropylene), and seventh group reinforced with 4mm of both fibers
(polyester and Polypropylene). 70 specimens were used for impact strength in seven
group (n=10) with measurements (80mm*10mm*4mm) length, width and thickness
respectively. 70 specimens were used for hardness test in seven groups (n=10) with
measurements (65mm*10mm*2.5mm) length, width and thickness respectively.
The Results Show that there are highly significant differences between all groups
except for a significant differences between control and combination 2 mm fiber
length (mean differences=33.45). For the hardness test the comparisons show that
there is no significant differences between groups except for a significant differences
between control and combination of both fibers with 2mm length (mean differences=-
1.34). For impact strength; there are highly significant differences between all groups
except for a significant differences between Polyester fiber of 2mm length and
combination of the two fiber of 2 mm length (mean differences=-3.1).
In conclusion, the addition of different fibers (polyester and Polypropylene) to
acrylic resin gives it more resistance to break and more resistance to bend.