Document Type : Research Paper
Author
College of Science - Department of Chemistry - University of Anbar
Abstract
This study was carried out to improve resistance to weathering
Conditions especially ultra energy rays through physical blending with polyol
monomer of 10%,20%,and30% ratios.The molding casting method was used to
manufacture the samples which were exposed to high tempreture (110c) for
(85)hours. The morphological study showed the nature of the distribution of
polyol molecules and their miscibility with unsaturated polyester, as well as, the
polymer mixtures surface..Also The photo graphs after radiation revealed that
the surface showed aclear difference according to mixing ratios and the extent of
degradation factors. The samples were continuosly exposed to uv-rays after
radiation for 300 hours wavelength 245 nm, the photographs showed clear
difference in the synthesized sample surface due to photodegradation which
observed by uv-spectra. The percentages 20% and 30% showed a great
sensitivity towards light . These samples gave swelling as a result of disohants
indicating their degradation was faster than other samples.( if compared with
the results of the virgin sample). It was proved that polyol with flexible
properties can give improvement to the properties of unsaturated polyester of
Hard properties via blending by 10% and lower ratios that give stabilization to
the studied samples .
Main Subjects
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