Surface Nucleation of Dispersed Droplets in Double Semicrystalline Immiscible Blends with Different Matrices

When a minor semicrystalline phase is dispersed in an immiscible blend with another polymer the form of isolated droplets, its crystallization behavior dominated by nucleation. In particular, nucleation can occur bulk volume (homogeneous nucleation), at surface possible nucleating foreign impurities, or interface matrix polymer. Dispersed poly(butene-1) (PB) and polycaprolactone (PCL) droplet phases are employed various matrices (isotactic polypropylene (iPP), high density polyethylene (HDPE), poly(vinylidene fluoride) (PVDF) poly(butylene succinate) (PBS)). The effect self-nucleation on then probed. It shown for all investigated blends that increasing temperature (Tc) via favors interface, leading to corresponding increase droplets'; Tc. Interestingly, distinct effects observed when different compared. highest efficiency displayed pairs, which known exhibit epitaxial from previous literature, namely PB/iPP PCL/HDPE. order other thought be linked extent crystallographic matching between substrate crystals.