1. Crystallization observed from the spin behavior in poly(3-methylthiophene)
- Author
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Agnieszka Pawlicka, W.A. Ortiz, A.A.J. Oliveira, L. Walmsley, Luis O.S. Bulhões, A.A. Correa, Otaciro R. Nascimento, and Ernesto C. Pereira
- Subjects
chemistry.chemical_classification ,Materials science ,Mechanical Engineering ,Doping ,Metals and Alloys ,Analytical chemistry ,Polymer ,Condensed Matter Physics ,Electronic, Optical and Magnetic Materials ,Amorphous solid ,law.invention ,SQUID ,chemistry ,Mechanics of Materials ,law ,Materials Chemistry ,Crystallization ,skin and connective tissue diseases ,Spin (physics) ,Electron paramagnetic resonance ,Line (formation) - Abstract
Electron Spin Resonance (ESR) data in pressed pellets of doped poly(3-methylthiophene) (P3MT) show a single ESR line that changes into a broad and a narrow superimposed lines below 225K. D.C. susceptibility measurements using a SQUID susceptometer didn't reveal any special feature at this temperature. Assuming crystallization of the polymer, we attribute the broad line to the crystalline fraction of the polymer and the narrow line to the amorphous one.
- Published
- 1999
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