Kinetic roughening transition and missing regime transition of melt crystallized polybutene-1 tetragonal phase: growth kinetics analysis

Abstract

The morphology and lateral growth rate of isotactic polybutene-1 (it-PB1) have been investigated for crystallization from the melt over a wide range of crystallization temperatures from 50 to 110°C. The morphology of it-PB1 crystals is a rounded shape at crystallization temperatures lower than 85°C, while lamellar single crystals possess faceted morphology at higher crystallization temperatures. The kinetic roughening transition occurs around 85°C. The nucleation and growth mechanism for crystallization does not work below 85°C, since the growth face is rough. However, the growth rate shows the supercooling dependence derived from the nucleation and growth mechanism. The nucleation theory seems still to work even for rough surface growth. Possible mechanisms for the crystal growth of this polymer are discussed.

Effect of Aging the Glass of Isotactic Polybutene-1 on Form II Nucleation and Cold Crystallization

“…The kinetics of formation of form II crystals from the relaxed melt, their morphology, and higher-order superstructure were extensively investigated in the past as a function of the transformation temperature. − It has been evidenced that crystals are of lamellar morphology. During their growth, spherulites form with a size which depends on the crystallization temperature.…”