Solution polycondensation of isophthalic acid/terephthalic acid and tetrachlorobisphenol A of low polymerizability with tosyl chloride/dimethylformamide/pyridine improved by the introduction of comonomers of smaller sizes

2003 ◽  
Vol 41 (6) ◽  
pp. 821-830 ◽  
Author(s):  
Fukuji Higashi ◽  
Miwako Moriya
Keyword(s):  
Terephthalic Acid ◽  
Isophthalic Acid ◽  
Tosyl Chloride ◽  
Tetrachlorobisphenol A ◽  
Solution Polycondensation

scholarly journals Some Decomposition Routes in the Mass Spectra of Aromatic Carboxylic Acids

1965 ◽  
Vol 20 (7) ◽  
pp. 883-887 ◽  
Author(s):  
J. H. Beynon ◽  
B. E. Job ◽  
A. E. Williams
Keyword(s):  
Carboxylic Acid ◽  
Benzoic Acid ◽  
Terephthalic Acid ◽  
Phthalic Acid ◽  
Mass Spectra ◽  
Deuterium Atom ◽  
Acid Group ◽  
Isophthalic Acid ◽  
Carboxylic Acid Group ◽  
Hydrogen Atoms

The mass spectra of benzoic acid, phthalic acid, isophthalic acid and terephthalic acid, together with the analogues deuterated on the carboxylic acid group have been studied. Exchange of the deuterium atom with hydrogen atoms on the positions ortho to a carboxylic acid group on the aromatic ring has been studied using meta-stable peaks.

New Wholly-Aromatic Thermotropic Polyesters with Controlled Flexibility

1999 ◽  
Vol 559 ◽  
Author(s):  
Devdatt S. Nagvekar ◽  
Patrick T. Mather ◽  
Hong G. Jeon ◽  
Loon-Seng Tan
Keyword(s):  
Molecular Weight ◽  
Phase Behavior ◽  
Terephthalic Acid ◽  
Synthesis And Characterization ◽  
Quiescent Phase ◽  
Tosyl Chloride ◽  
Melt Spun ◽  
Spun Fibers

ABSTRACTIn this work, we present the synthesis and characterization of a new series of wholly-aromatic copolyesters derived from the condensation of various weight fractions of 4,4'-(o- phenylenedioxy)dibenzoic acid (OPDB) and substituted terephthalic acid (BTA) with 2-phenylhydroquinone (PHQ). The Higashi method, involving tosyl chloride and pyridine as solvent, was employed to yield polymer with significant molecular weight. These polymers are intended to enable accessible clearing transition and to control the balance of stiffness and toughness in melt-spun fibers systematically. We report the synthetic details along with characterization of quiescent phase behavior and morphology.

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