Preparation of polyvinyl alcohol from local raw material
Joint Authors
Ammar, Sad Hanash
Hawil, Cecelia K.
Source
Iraqi Journal of Chemical and Petroleum Engineering
Issue
Vol. 9, Issue 1 (31 Mar. 2008), pp.15-21, 7 p.
Publisher
University of Baghdad College of Engineering
Publication Date
2008-03-31
Country of Publication
Iraq
No. of Pages
7
Main Subjects
Topics
Abstract EN
Polyvinyl alcohol, (PVA) was prepared using polyvinyl acetate emulsion (manufactured by Al-Jihad factory, That-Al-Sawary Company) as a local raw material.
In this investigation, polyvinyl acetate emulsion was converted to solid form by coagulation the polymer from its emulsion using sodium sulphate salt as coagulant aid, then alcoholyzed the solid polyvinyl acetate in methanol using sodium hydroxide as catalyst, polyvinyl alcohol produced by this method is a dry, white to yellow powder.
Three affecting variables on the degree of hydrolysis of PVA were studied, these variable are Catalyst to polymer weight ratio in the range of 0.
01-0.
06, reaction time in the range of 20-90 min, and reaction temperature in the range of 25-50 oC.
The effect of degree of hydrolysis of PVA produced on its properties such as water solubility and degree of polymerization were studied also.
Finally the alcoholysis reaction kinetics were studied to determine the reaction constants such as initial rate constant and degree of autocatalytic effect of the alcoholysis reaction.
It was found that the degree of hydrolysis of formed polyvinyl alcohol increase with increasing of variables catalyst concentration, reaction time and reaction temperature, furthermore, the water solubility of PVA increase with increasing degree of hydrolysis up to about 87 % after this value the solubility is decrease, also the degree of polymerization of PVA decrease with increasing of degree of hydrolysis up to about 89 %.
American Psychological Association (APA)
Hawil, Cecelia K.& Ammar, Sad Hanash. 2008. Preparation of polyvinyl alcohol from local raw material. Iraqi Journal of Chemical and Petroleum Engineering،Vol. 9, no. 1, pp.15-21.
https://search.emarefa.net/detail/BIM-353888
Modern Language Association (MLA)
Hawil, Cecelia K.& Ammar, Sad Hanash. Preparation of polyvinyl alcohol from local raw material. Iraqi Journal of Chemical and Petroleum Engineering Vol. 9, no. 1 (Mar. 2008), pp.15-21.
https://search.emarefa.net/detail/BIM-353888
American Medical Association (AMA)
Hawil, Cecelia K.& Ammar, Sad Hanash. Preparation of polyvinyl alcohol from local raw material. Iraqi Journal of Chemical and Petroleum Engineering. 2008. Vol. 9, no. 1, pp.15-21.
https://search.emarefa.net/detail/BIM-353888
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references : p. 21
Record ID
BIM-353888