Volume : IV, Issue : VII, July - 2015

ON THE TEMPERATURE DEPENDENT ESR OF GAMMA IRRADIATED POLYACRYLAMIDE

Ch. Srinivas, A . Raju, S. Kalahasthi, B. Sanjeeva Rao

Abstract :

 Radiation induced chemical changes in PAAm have been studied by the electron spin resonance (ESR) technique. ESR spectra of irradiated PAAm have been recorded in the temperature range of 300–400 K. An ESR quintet was observed at 300 K (Room temperature). The quintet gradually decreased to triplet and then to a singlet by heating the irradiated polymer. Finally the ESR signal decayed around 420 K. The spectrum is assigned to the free radicals of the type CH2–C(CONH2)–CH2, formed by cleavage of proton from the main chains of the polymer. Reason the decay of ESR signal has been explained in terms of molecular mobility of the polymer. DSC thermograms of irradiated and irradiated, heated PAAm are also recorded to study the thermal properties.

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Article: Download PDF   DOI : 10.36106/ijsr  

Cite This Article:

Ch. Srinivas, A .Raju, S. Kalahasthi, B. Sanjeeva Rao On the Temperature Dependent Esr of Gamma Irradiated Polyacrylamide International Journal of Scientific Research, Vol : 4, Issue : 7 July 2015

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