Optimization Conditions for Preparation Of Polyvinyl Alcohol- Alumina Gel Composite and its Properties

Abass, Raghad U.

doi:10.30684/etj.28.20.11

	Optimization Conditions for Preparation Of Polyvinyl Alcohol- Alumina Gel Composite and its Properties
Engineering and Technology Journal
Article 1, Volume 28, Issue 20, 2010, Pages 6115-6127 PDF (227.78 K)
DOI: 10.30684/etj.28.20.11
Author
Raghad U. Abass
Materials Engineering Department, University of Technology / Baghdad
Abstract
A preparation of poly (vinyl alcohol) (PVA)/alumina (Al 2O3) gel composite was investigated. This type of composite gel was carried out with two stages firstly the hydrolysis of polyvinyl alcohol in a hot water at 200ºC for 2 hours and different mixing ratio of (PVA/H2O) solution at (10,20,30,40,50) wt% has been investigated to check its operating conditions .Secondly different ratios of alumina refractory were used (5,10,15,20,25) wt% of (AL2O3 /PVA) at 350ºC for 4 hours to give a completes composite gel of ( PVA/Al2O3) in a polymerization stage. The final composite gel of (Al2O3/PVA) is molded in a different shapes and size due to suitable characteristics tests in order to check chemical, thermal, and mechanical properties afterward curing these specimens at 120ºCfor 2 hours to complete the compatibility of composite gel. The results tests proved that: All final composite gel specimen is more efficient than other base polyvinyl alcohol (PVA) of high mechanical and thermal properties than base one with less internal stresses, also the resistance for chemical solutions in (100%H2O, 10%H2SO4) is increased at sever conditions at 50ºC for 5 days especially for optimum mixing ratio specimen No.3 with preference for optimum sample No.3 of (30%PVA Sol./15% Al2O3) g/g.
Keywords
Optimization conditions; preparation; Polyvinyl alcohol; alumina gel composite; properties

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