Polyesters on the basis of petroleum resin and polyethylene glycols
-
Published:2007-09-15
Issue:3
Volume:1
Page:155-160
-
ISSN:1996-4196
-
Container-title:Chemistry & Chemical Technology
-
language:
-
Short-container-title:ChChT
Author:
Brostow Witold, ,Bratychak Michael,Pietkiewicz Dorota,Topilnytsky Petro, , ,
Abstract
New polyesters have been obtained on the basis of C9 petroleum resin with carboxyl groups and polyethylene glycols. The average molecular mass of the petroleum resin is 1050, its functionality = 1.74. Optimal for the polyesters synthesis is the equimolar ratio between the initial compounds. The reaction is performed in the melt in the presence of p-toluenosulphuric acid as the catalyst. In the optimal temperature range 150 - 190oC the yield of the process ranges from 91 to 94 % depending on the conditions. The rate of the polyester formation reaction practically does not depend on the length of the acids or the alcohol chain molecules. The functionality is the decisive factor. We report the degrees of polycondensation of the new polyesters.
Publisher
Lviv Polytechnic National University
Subject
General Chemical Engineering,General Chemistry
Reference13 articles.
1. [1] Pratt G.J. and Smith M.J.A.: (2001) Polymer Internat. 51:21
2. [2] M. Hess and B.L. Lopez (1998) Ch. 9 in: W. Brostow (ed.) Mechanical and Thermophysical Properties of Polymer Liquid Crystals; Chapman & Hall, London
3. [3] M. Hess (2000) High Performance Polymers, Ch. 21 in W. Brostow (ed.), Performance of Plastics; Hanser, Munich - Cincinnati
4. [4] M. Hess and J. Pionteck (2002) Mater. Res. Innovat. 6:51
5. [5] E.B. Mano (1996) Polimeros como materiais de engenharia; Edgard Blücher, São Paulo