Phase transformation in poly(1-butene) blended with hydrogenated oligo(cyclopentadiene)

Isothermally crystallized blends of isotactic poly(1-butene) (PB-1) with hydrogenated oligo-(cyclopentadiene) (HOCP) were annealed for different periods of time and at different temperatures and then analyzed by differential scanning calorimetry. The HOCP, a glassy oligomer with a relatively high T_g value, results with PB-1 in a one-phase system in the melt. The kinetics of crystal transformation of poly(1-butene) from form II to form I are subject to the influence of the non-crystallizable component on the amorphous phase of PB-1. The phase transformation process was also analyzed by means of the Avrami equation. During the conversion process secondary crystallization of PB-1 was observed.