Naslov
The influence of talc content on the thermal and mechanical properties of polyurethane/polypropylene blends

Autori
Govorčin Bajsić, Emi ; Rek, Vesna ; Ormuž Pavić, Bojana

Izvornik
Journal of elastomers and plastics (0095-2443) 45 (2013), 6; 501-522

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

Ključne riječi
polymer blends; thermoplastic polyurethane; polypropylene; talc; thermal properties; mechanical properties; thermal stability

Sažetak
The influence of different talc content on the thermal and mechanical properties of TPU/PP blends was investigated. The compatibility and crystallinity of TPU/PP and TPU/PP/F blends were determined with different scanning calorimetry (DSC). The DSC results indicated that the addition of PP in TPU/PP blends increased glass trasition temperature (Tg), melting temperature ( Tm ) and crystallinitiy (χc ). The addition of talc has decreased Tm and χc and increased Tg and crystallization temperature (Tc). Effect of talc content on Tg , Tm and χc was insignificant , while increased Tc .The Tg of non-filled and talc filled blends increased this suggest that the TPU and PP are partially compatible. TGA analyses showed improved thermal stability of all investigated non-filled and talc filled TPU/PP blends in nitrogen atmosphere.In air atmosphere only talc filled TPU/PP 80/20 blends show a higher thermal stability, while thermal stability decreased for TPU/PP 50/50 and insignificant increased for TPU/PP 20/80 blends. DSC and TGA results showed improved thermal properties of talc filled TPU/PP blends as compared with non-filled blends. The mechanical properties of talc filled TPU/PP 50/50 and 20/80 blends were improved in terms of tensile strength and Young's modulus, while elongation of break decreased with the addition of talc and as the talc content increased.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

POVEZANOST RADA