Naslov
Blends of Thermoplastic Polyurethane and Polypropylene. II. Thermal and Morphological Behavior

Autori
Govorčin Bajsić, Emi ; Pustak, Anđela ; Šmit, Ivan ; Leskovac, Mirela

Izvornik
Journal of applied polymer science (0021-8995) 117 (2010), 3; 1378-1384

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
polymer blends; thermoplastic polyurethane; polypropylene; morphology

Sažetak
Neat thermoplastic polyurethane (TPU), polypropylene (PP) and TPU/PP blends with different weight ratios prepared in a twin-screw extruder were investigated by differential scanning calorimetry (DSC), light and scanning electron microscopy. The results confirmed PP matrix → TPU matrix phase inversion in the concentration region between TPU/PP 60/40 and 80/20 blends. Total degree of crystallinity of the blends and the crystallization temperature of the PP decreased with increasing TPU content. On the other side, the addition of elastomeric TPU to the PP significantly increased the spherulite size of polypropylene. The TPU melt islands in the PP matrix prolonged the crystallization of the PP during solidification process enhancing thus the growth of spherulites.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Kemijsko inženjerstvo

POVEZANOST RADA