Crystallization observed from the spin behavior in poly(3-methylthiophene)

Authors :: Agnieszka Pawlicka
W.A. Ortiz
A.A.J. Oliveira
L. Walmsley
Luis O.S. Bulhões
A.A. Correa
Otaciro R. Nascimento
Ernesto C. Pereira
Source :: Synthetic Metals. 101:355
Publication Year :: 1999
Publisher :: Elsevier BV, 1999.
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.