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Paper Information

Journal:   IRANIAN POLYMER JOURNAL (ENGLISH)   2008 , Volume 17 , Number 3; Page(s) 217 To 226.
 
Paper: 

STEP-GROWTH POLYMERIZATION OF 5-(3-ACETOXYNAPHTHOYLAMINO)ISOPHTHALIC ACID WITH DIFFERENT AROMATIC DIOLS

 
 
Author(s):  MALAKPOUR SH.*, RAFIEI Z.
 
* ORGANIC POLYMER CHEMISTRY RESEARCH LABORATORY, DEPARTMENT OF CHEMISTRY, ISFAHAN UNIVERSITY OF TECHNOLOGY, ISFAHAN 84156-83111, IRAN
 
Abstract: 

Soluble and photoactive novel aromatic polyesters containing acetoxynaphthalamide unit in the side chain have been synthesized with moderate molecular weights by direct polycondensation of 5-(3-acetoxynaphthoylamino)isophthalic acid with different aromatic diols using tosyl chloride (TsCl), pyridine (Py) and N,Ndimethylformamide (DMF) system as a condensing agent. The reaction was successfully applied to the preparation of thermally stable polyesters with good yields and inherent viscosities in the range of 0.28-0.62 dL/g. The resulted polymers are readily soluble in aprotic polar solvents such as N-methyl-2-pyrrolidone, N,N-dimethylacetamide, DMF, Py and dimethyl sulphoxide. Thermogravimetric analysis data showed that these polyesters are thermally stable, with 10% weight loss being recorded above 360°C. These macromolecules exhibited maximum UV-vis absorption at 269 and 320 nm in DMF solution. Their photoluminescence in DMF solution demonstrated fluorescence emission maxima around 360 and 428 nm for all polyesters obtained.

 
Keyword(s): POLYESTER, TSCL/PY/DMF CONDENSING AGENT, THERMAL PROPERTIES, SOLUBILITY, DIRECT POLYCONDENSATION
 
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