COMPARISON OF THE USE OF SACKS AND COMMERCIAL CARBON FIBERS TO IMPROVE THERMO -MECHANICAL PROPERTIES OF (EPOXY – POLYVINYL FORMAL ) RESINS BLE

A. Hussien, Mukheled; O. Abass, Raghad; O. Abass, Falak

	COMPARISON OF THE USE OF SACKS AND COMMERCIAL CARBON FIBERS TO IMPROVE THERMO -MECHANICAL PROPERTIES OF (EPOXY – POLYVINYL FORMAL ) RESINS BLE
AL-TAQANI
Article 1, Volume 24, Issue 2, 2011, Pages 11-21
Authors
Mukheled A. Hussien; Raghad O. Abass; Falak O. Abass
Abstract
This research is focused on the development of new method for applying the solid wastes (sacks) from high volume, low cost, renewable fiber sources as reinforcing material for blend consists of epoxy resin as the matrix-binder at fixed weight and different weights of polyvinyl formal (PVF) as additive resin. The experimental results of sacks were compared with commercial carbon fibers to improve the mechanical and thermal properties of prepared (epoxy-PVF) blend. Several experiments were carried out to investigate the optimum operating conditions (mixing speed and mixing time) for the preparation of (epoxy-PVF) blend at room temperature to achieve an optimum performance. The optimum mixing speed and time were 700 rpm and 15 minutes respectively. The optimum weighted ratios of prepared blend were characterized by the hardness, impact strength, bending distortion, bending deflection and thermal conductivity properties for the nonreinforced samples with sacks and carbon fibers that found (0.21, 0.10, 0.16, 0.16 and 0.10 weight of PVF in (g)/weight of epoxy in (g) as w/w) for each property respectively. These ratios showed the best chemical bonding forces between epoxy and PVF resins. The maximum values of hardness and impact strength properties for nonreinforced samples occurred at the optimum weighted ratios of prepared blend were found 82shore and 2.15J/cm2 respectively. While the minimum bending deflection and thermal conductivity values of nonreinforced samples occurred at the optimum weighted ratios of prepared blend were found 16mm and 0.01159W/cm.oC respectively. Experimental results showed that reinforced samples with sacks and carbon fibers leading to enhancement in the mechanical and thermal properties and clearly improvement when compared to the nonreinforced samples. The improvement of reinforced samples with sacks for mechanical and thermal properties was predominant compared to the commercial carbon fibers. Keywords: epoxy, polyvinyl formal, sacks, carbon fibers and thermo-mechanical properties.

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