This research aims to study the effect of heat treatment on curing of reinforced Unsaturated Polyester Resin (UPR) with fiberglass, and to study the effect of storage time and the time of exposure to natural aging on curves absorption.
The results
showed that it is very difficult to reach a fully curing to UPR matrix, and
Storage samples for three years reveal resistance to degradation in fresh and seawater comparing with storage samples for three months, or aging by exposed to environmental for three years. The results showed also that the absorption occurs by thin film, and not prevent by increasing the layers of reinforcement
In this paper an experimental investigation of unsaturated polyester(UPR) with
different weight fractions(2,4,5,7 )wt% of (Al2O3,MgO,TiO2) as powders ,has been done.
the identification of their flammability and fire resistance ranges are found out
. the time
needed to puncture the samples, the mass loss, the diameter variation ,and the flame effect
on the samples surface are measured. the samples were tested by Oxyacetylene flame using
a device which is designed in the Faculty of Mechanical and Electrical Engineering labs.
The results showed that (MgO) is the best one for its flammability and fire
resistance. The longest time before puncture , and the lowest mass loss were achieved by(
UPR+ 7% MgO) with(16% mass loss in 112 sec ), while pure UPR has ( 27% mass loss in
45 sec).
In this paper an experimental investigation of unsaturated polyester(UPR) with
different weight fractions(2,4,5,7 )wt% of (Al2O3,MgO,TiO2) as powders ,has been done.
the identification of their flammability and fire resistance ranges are found out
. the time
needed to puncture the samples, the mass loss, the diameter variation ,and the flame effect
on the samples surface are measured. the samples were tested by Oxyacetylene flame using
a device which is designed in the Faculty of Mechanical and Electrical Engineering labs.
The results showed that (MgO) is the best one for its flammability and fire
resistance. The longest time before puncture , and the lowest mass loss were achieved by(
UPR+ 7% MgO) with(16% mass loss in 112 sec ), while pure UPR has ( 27% mass loss in
45 sec).
The aim of this study is to determine strength of adhesive single-lap joints of
Aluminum alloys which are widely used in geometric applications. It was investigated to
define the influence of overlap length and surface roughness value on shear stre
ngth of
achieved adhesive joints. It was used Epoxy and Acrylic adhesives to prepare adhesive
joints and all the specimens were subjected to axial tensile tests and the results are
presented as a comparison.
Results of those tests showed that shear strength increased with increasing each of
overlap length and surface roughness of adherends and Acrelicadhesiveproduced4better
results according to failure mode of tested samples.
In this study, we have investigated the water absorption behavior of unsaturated
polyester /wood flour wastes composites materials. To achieve that, specimens were
prepared by using compressing method with different ratio of polymer matrix with org
anic
wastes produced from carpentry workshop (wood flour).Density of produced panels has
been measured and the obtained results showed that there is an ability to produce
hardindustrial wood panels. Practical experiments had been achieved to determine the
percentages of water absorption. Absorption test was achieved on the cut specimens by
immersing them in natural water (un-distilled) and measuring the gained weight of
specimens and the resulted swelling to determine the final changes in the product. Through
this study, we find that the absorbability has increased with the increment of organic filler
ratio and the practices sizes increment. In addition, we also find that the absorption
behavior follow Fickian law of diffusion in most specimens. We calculated the diffusion
coefficient D and other parameters of diffusion process and we also plotted the associated
plotsof the absorbability results. The obtained results showed that there is an ability to
produce planes of industrial wood without any pretreatment of wood flour.
