Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : Diffusion Coefficient

Study of the Diffusion Coefficient and Hardness for a Composite Material when Immersed in Different Solutions Polymer

S.H. Aleabi; H.G. Attiya; A.W. Watan

Engineering and Technology Journal, 2017, Volume 35, Issue Issue 1C, Pages 191-196
DOI: 10.30684/etj.35.1C.16

In this research, a hybrid composite material was prepared of epoxy as a matrix, and reinforced by iron (Fe) powder and iron oxide (Fe2O3) powder with a weight fraction 30%.
The composite material was prepared by the Iay-up method .It was studied may tests involves absorption test to find diffusion coefficient for the composite material after the immersion it in sometime specific time (3) weeks in different chemical solution as (H2O,HNO3,NaOH) concentration (0.1N) and the hardness test measure before and after immersion .
When increase the immersion time and the result showed the high diffusion in the water (0.839) and (0.288) in the solution (HNO3) and (0.237) in the solution of (NaOH).

Studying the Effect of Corrosive Liquids on Pipes Properties of Unplastizied Polyvinyl Chloride (UPVC) Which is Used in Sewage Purpose

Ahmad Star Ali

Engineering and Technology Journal, 2012, Volume 30, Issue 15, Pages 329-340
DOI: 10.30684/etj.30.15.14

The current study concerns with studying some mechanical and physical properties of different samples taken from Unplasticized Polyvinyl Chloride (UPVC) pipes used in sewage purpose. Impact strength, compressive strength, shore-D hardness, and diffusion coefficient also were calculated for the samples immersed in different solutions (Wastewater, HCl-0.5N, and Tape water) for four months. Results showed that the mechanical properties of samples were affected by solutions and reduced by (3 – 5)% for impact strength and (10%) for compressive strength. Values for diffusion coefficient (D) were calculated, it
was found that (HCl-0.5N) had a higher value, followed by wastewater then tape water. No cracks were observed, and there were no changes in sample’s dimensions after immersion in solutions.

Diffusivity of water in Unplasticised PVC

Awham M.H; Zaid Ghanem M. Salih

Engineering and Technology Journal, 2010, Volume 28, Issue 10, Pages 1960-1966
DOI: 10.30684/etj.28.10.7

The current study concerns an investigation of diffusion mechanism of
different kinds of water into thermoplastic material (type unplasticised PVC,
(UPVC)) that is often used as pipes for healthy draining purposes and other
After preparation of samples from this material, they were immersed in glass
containers which contain (sea water, river water, rain water, distilled water, and
tap water), the weights of these samples are measured at periodic time of soaking.
The aim of this work is introducing an idea about the diffusion behavior and the
penetration of water through the material under study, then, the values of diffusion
coefficient (Dx) are evaluated for each type of water mentioned above.
After comparing the obtained results from these tests, it is found that the distilled
water has the higher value of (DX) into the (UPVC) material, it is followed by the
sea water and then the rainwater, while each of the river and tap water record the
lowest values.