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Effect of environmental conditions on Shore hardness values of polymer blend | ||
| journal of the college of basic education | ||
| Article 1, Volume 16, Issue 69, 2011, Pages 73-80 | ||
| Authors | ||
| Asist. Lecture. Zaynab N. R; Dr. Awham M. H | ||
| Abstract | ||
| The current investigation was carried to study and determine the values of shore D hardness for polymer blends at different environmental conditions. Epoxy (EP) and Unsaturated polyester (UPE) resins were used to prepare polymer blends(EP/UPE) with various weight ratios (95/5)% , (90/10)% . After determining Shore hardness values, the specimens of both ratios of mixing were subjected to different environments included: sunlight for times) 1,2,3,4,5) hours, the immersion into diverse types of waters (distilled, tap and rain) for the same previous periods for comparing the two cases. Other samples were immersed into the mentioned water kinds but for longer times (1,2,3,4) weeks. The results showed that the shore hardness values increase of both ratios after the subjecting to the sunlight at the above period while decease when the specimens were immersed into the different water sorts at the same period. The obtained results showed that the rate of dropping of hardness values was increased clearly at longer times of the immersion (4 weeks). Keywords: Polymer blends, Shore hardness, sunlight, immersion | ||
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