Abstract
In our previous works the results by GPC were compared with those by light scattering and column chromatography for lowcis-polybutadiene.
In this work calibration curve and Mw-[η] of highcis-polybutadicne were compared with those of low cis-polybutadiene. The following results were obtained;
1) At the same count, intrinsic viscosity of low cis-polybutadiene was slightly higher than that of high cis-polybutadiene.
2) At the same count, molecular weight of low cis-polybutadiene was smaller than that of high cis-polybutadiene.
3) Mw and Mw/Mn, of commercial high cis-polybutadiene were larger than those of commercial low cis-polybutadiene.
4) Chain molecule of low cis-polybutadiene was more flexible than that of high cis-polybutadiene.
5) At the same molecular weights radii of gyration [Rz2]1/2 of low cis-polybutadiene obtained by light scattering in THF at 25°C were larger than those of high cis-polybutadiene, but at the same count [Rz2]1/2 of both polybutadienes were substantially equal. From this fact, fractionation by GPC appeared to be based on the extent of molecule in the solution.
