13C n.m.r. study of optically active polymers: 2. Relaxations in poly [(S)-4-methyl-1-hexene]

The obsd. sepn. of 2 conformers in the 13C NMR of 2 fractions of poly[(S)-4-methyl-1-hexene] [29504-00-5] cannot be explained easily unless configurational differences are present. Such differences may result from differences in steric defects in the side chain and/or in the backbone (degree of tacticity). The extent of such defects must be below the sensitivity limits used. Dynamic parameters in relaxation are also discussed