Polyether nitrile and its copolymers were synthesized by nucleophilic substitution reaction of 2,6-dichlorobenzonitrile with resorcinol and with varying mole proportions of resorcinol and hydroquinone. The polymers were characterized by different physico-chemical techniques. Thermogravimetric studies showed that all the polymers were stable up to 400°C with a char yield of above 48% at 900°C in N2 atmosphere. The glass transition temperature was found to increase with increase in concentration of hydroquinone units in the polymer; however no trend was observed in their crystalline melt temperatures. Copolymer composition was determined using FT-IR technique. Crystallinity of the polymers was also studied using wide angle X-ray diffraction.
Dr. Akanksha Saxena Pandit, Sadhana, R., Rao, V. L., Kanakavel, M., and Ninan, K. N., “Synthesis and Properties of Polyarylene ether Nitrile Copolymers”, Polymer Bulletin, vol. 50, pp. 219–226, 2003.