Two wide signals were detected: one located at 25.5 ppm
(methyl) and the other one at 128.0 ppm (aromatic).
These signals were attributed to the mobile groups, as
they present more freedom to rotate along the chains.
Another kind of information was related to the fact that
this homopolymer presents at least two domains with different
mobilities, as a consequence of it being amorphous.
Other important data was obtained from the CPMAS 13C spectrum (Fig. 2).