The styrene-crosslinked mixed polyesters derived from maleic anhydride, 2,2-di-(4-hydroxypropoxyphenyl)propane and 1,2-propylene glycol were studied by means of high-resolution 13C n.m.r. in the solid state (CP/MAS). The proton spin–lattice relaxation time, T1H and H spin–lattice relaxation time in the rotating frame, T1r were determined and compared with corresponding values calculated for hypothetical mixed ester/styrene copolymers. The results, found to be consistent with T g data, were interpreted in terms of the mixing, copolymer and crosslinking effects.
Посилання на статтю:
13 C solid-state n.m.r. study of styrene-crosslinked mixed polyesters / J. Grobelny // Polymer. – 1999. – N 40. – P. 2939–2948.