Naslov
Preparation and Characterization of Talc Filled Thermoplastic Polyurethane/Polypropylene Blends

Autori
Govorčin Bajsić , Emi ; Rek, Vesna ; Ćosić Ivana

Izvornik
Journal of polymers (1566-2543) 2014 (2014); 1-8

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

Ključne riječi
Thermoplastic polyurethane; Polypropylene; Polymer blends; Thermal properties;

Sažetak
In the present work, the effect of the addition of talc on the morphology and thermal properties of blends of thermoplastic polyurethane (TPU) and polypropylene (PP) was investigated. The blends of TPU and PP are incompatible because of large differences in polarities between the nonpolar crystalline PP and polar TPU and high interfacial tensions. The interaction between TPU and PP can be improved by using talc as reinforcing filler. The TPU/T/PP blends using 5 wt. % of talc were prepared by melt mixing with a twin-screw extruder and then injection molded with an injection molding machine. The morphology was observed by means of scanning electron microscopy (SEM). The thermal properties of the neat polymers and unfilled and talc filled TPU/PP blends were studied by using dynamic mechanical analysis (DMA), differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). The addition of talc in TPU/PP blends improved miscibility in all investigated TPU/T/PP blends.The DSC results for talc filled TPU/PP blends show that the degree of crystallinity increased, which is due to the nucleating effect induced by talc particles. The reason for the increased storage modulus of blends with the incorporation of talc is due to the improved interface between polymers and filler. According to TGA results, the addition of talc enhanced thermal stability. The homogeneity of the talc filled TPU/PP blends is better than unfilled TPU/PP blends.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

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