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Synthesis and properties of poly ether nitrile sulfone copolymers with pendant methyl groups
Author(s) -
Saxena Akanksha,
Sadhana R.,
Rao V. Lakshmana,
Ravindran P. V.,
Ninan K. N.
Publication year - 2005
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.21780
Subject(s) - polymer chemistry , hydroquinone , copolymer , ether , nitrile , glass transition , polymer , thermogravimetric analysis , crystallinity , materials science , solvent , nucleophilic substitution , chemistry , organic chemistry , composite material
Poly ether nitrile and poly ether nitrile sulfone copolymers with pendant methyl groups were prepared by the nucleophilic substitution reaction of 2,6′‐dichlorobenzonitrile with methyl hydroquinone and with varying mole proportions of methyl hydroquinone and 4,4′dihydroxydiphenylsulfone using N ‐methyl pyrrolidone as solvent in the presence of anhydrous K 2 CO 3 . The polymers were characterized by different physicochemical techniques. Copolymer composition was determined using FTIR technique. Thermogravimetric data reveals that all the polymers were stable up to 420°C with a char yield above 40% at 900°C in N 2 atmosphere. The glass transition temperature was found to increase and the activation energy and inherent viscosities were found to decrease with increase in concentration of the 4,4′‐dihydroxydiphenylsulfone units in the polymer. Trimerization reactions are found to be favorable with increase in concentration of methyl hydroquinone units in the polymer. Crystallinity of the polymer was also studied using wide angle X‐ray diffraction. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 99: 1303–1309, 2006