Electron Spin Resonance Studies of Spin-Labelled Polymers: Part 14.—End-group Mobility of Polystyrene as a Function of Temperature and Solvent

Bullock, Anthony T

dc.contributor.author	Bullock, Anthony T
dc.date.accessioned	2025-11-17T04:50:30Z
dc.date.available	2025-11-17T04:50:30Z
dc.date.issued	1978
dc.identifier.uri	http://dspace.bits-pilani.ac.in:8080/jspui/handle/123456789/20055
dc.description	A high molecular weight sample of anionically prepared polystyrene has been labelled specifically at the chain ends with nitroxide radicals. Line width analysis of the e.s.r. spectra of dilute solutions of the polymer gave rotational correlation times of the chain ends. The solvents used were toluene, α-chloronaphthalene and cyclohexane. After making allowance for the viscous drag of the solvent energy barriers to rotation were obtained and compared with those found previously for the random segmentally labelled polymer. Differences have been shown to arise through the internal barrier to rotation rather than through the pre-exponential term. It was found possible to show that the rotational mobility of the nitroxide was strictly governed by the mobility of the polymer chain end since the correlation time for rotation about the polymer—label bond was never less than 4τc, where τc is the observed correlation time for rotational diffusion of the nitroxide.	en_US
dc.language.iso	en	en_US
dc.publisher	Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1978, 74 (3)	en_US
dc.subject	Chemistry	en_US
dc.subject	Electron spin resonance	en_US
dc.subject	Spin-labelled polymers	en_US
dc.subject	Journal of the Chemical Society : Faraday Transaction - I	en_US
dc.title	Electron Spin Resonance Studies of Spin-Labelled Polymers: Part 14.—End-group Mobility of Polystyrene as a Function of Temperature and Solvent	en_US
dc.type	Article	en_US