Abstract
Transmission effects in the 2-mm EPR range and the induced spin-echo in the 3-cm range have been used to investigate the relaxation parameters of neutral and of modified (by irradiation or doping) polyacetylene. The spin-spin and spin-lattice relaxation times of cis- and trans-polyacetylene have been determined between 90 and 320 K. These parameters have been shown to depend on the specimen thickness, degree of π-conjugation and the concentration of paramagnetic centres. The fact that the rate of spin-lattice relaxation depends on the square of the temperature is evidence that Raman relaxation processes predominate in the polymer. Irradiation leads to stabilization of the parameters of polyacetylene.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
