Please use this identifier to cite or link to this item:
http://dspace.bits-pilani.ac.in:8080/jspui/handle/123456789/20055| Title: | Electron Spin Resonance Studies of Spin-Labelled Polymers: Part 14.—End-group Mobility of Polystyrene as a Function of Temperature and Solvent |
| Authors: | Bullock, Anthony T |
| Keywords: | Chemistry Electron spin resonance Spin-labelled polymers Journal of the Chemical Society : Faraday Transaction - I |
| Issue Date: | 1978 |
| Publisher: | Journal of the Chemical Society : Faraday Transaction - I. The Chemical Society, London. 1978, 74 (3) |
| 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. |
| URI: | http://dspace.bits-pilani.ac.in:8080/jspui/handle/123456789/20055 |
| Appears in Collections: | Journal Articles (before-1995) |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| 0727-0732.pdf Restricted Access | 372.11 kB | Adobe PDF | View/Open Request a copy |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.