Mechanical Properties of Unsaturated Polyester Filled With Silica Fume, Glass Powder and Carbon Black

Abstract

In this study a polymer matrix composites (PMCs) have been prepared with the aid of ultrasonic wave dispersion method for mixing , using of unsaturated polyester resin with Silica Fume(SF), Glass Powder (GP)and Carbon Black (CB). Moulds were prepared by hand-made from silicon rubber according to the ASTM standard table (4). The fillers added separately with different ratios as (0%,0.5%, 1%, 1.5 %, 2%,2.5% and 3%).The results show increase the hardness and impact strength when added GP, SF, and CB to polymer matrix. Flexural strength and maximum shear stress decrease when added silica fume , but when added glass powder and carbon black led to increase flexural strength and maximum shear stress to certain percent at ( 2%, 1.5% for GP and CB respectively) then dropped when increase weight fraction of GP, CB . Compressive strength decrease when added glass powder and carbon black, while it is increase when added silica fume to polymer matrix. Wear rate decrease when increase weight fraction of carbon black but it increases when added GP and SF.

Preparation of Polyester/ Micro Eggshell Fillers Composite as Natural Surface Coating

“…Then it decreased to (9.15 KJ/m2) by adding (6%E.SF) to polyester. According to the researchers, this rise and then decline in impact strength is similar to the behavior of polyester composites [10].…”

“…Figure (10) shows that the water diffusion of polyester with eggshells with ratios (of 4%) and (5%) (for one-week immersion in tap water), both composites have a higher resistance to water diffusion than the other addition ratios. Figures ( 11and 12) show the improvement in polyester resistance to water diffusion by adding eggshell by weight radio (5%) with an increase in immersion time to ( 2 and 3) weeks, with an increase in the immersion time to (4 weeks) the eggshell ratio (4%) will improve the resistance of polyester against the water diffusion.…”

“…Figures (10)(11)(12)(13) show the increase in water diffusion of (polyester/eggshell fiber) composites with an increase in the weight ratios of eggshell fibers. This is because of the osmotic process, where the water molecules are interred to the small voids and cavities of samples.…”

“…Chicken eggshell fibers have been used with different percentages and particle sizes to reinforce polypropylene (PP), where the Young's modulus increased because of the improvement of the bonding between eggshell powder and polypropylene matrix [4]. The eggshell has been used with weight ratios (10,20, and 30 %) as fillers in poly lactic acid (PLA), and they have found that the ratio (30% eggshell) was the best to improve the (PLA) strength [5]. The epoxy flexural and tensile moduli are improved using the eggshell by the two weight ratios of 10 and 20 % [6].…”

IMPROVEMENT ON DENTAL COMPOSITE RESIN USING Supra -Nano Chicken thigh bone fibers

“…The test was done on specimens of a dental composite resin holding on the epoxy using a universal compression test machine, the compressive stress was calculated using the equation( 3) [8].…”