Naslov
Thermal behaviour of blends of thermoplastic polyurethane and polypropylene

Autori
Govorčin Bajsić, Emi ; Rek Vesna ; Rebac, Ivan

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
MATRIB 2005, Abstracts book / Krešimir, Grilec - Zagreb : Hrvatsko društvo za materijale i tribologiju (HDMT), 2005, 15-15

ISBN
953-7040-08-9

Skup
MATRIB 2005

Mjesto i datum
Vela Luka, Hrvatska, 23.06.2005. - 25.06.2005

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
polymer blends; thermoplastic polyurethane; DSC; crystallinity; compatibility

Sažetak
The melting and crystallization behaviour of blends consisting of thermoplastic polyurethane (TPU) and an isotactic polypropylene (i-PP) have been investigated by differential scanning calorimetry (DSC). Glass transition temperature was also measured by DSC to estimate the compatibility of the blends. Blends of different ratios of TPU/PP were produced by melt mixing using a Haake Record 90 twin –screw extruder. The investigation indicated that the total degree of crystallinity of the blends increases with the increase in the PP content. The melting peaks of the blends shifted to a higher temperature as the PP content was increased. The crystallization temperature of the PP decreases with increasing TPU content and a new crystallization peak appears. The crystallization of PP is obviously hindered by the presence of TPU and/or the mechanism of crystallization changes with composition. The glass transition temperature of the PP phase could not be detected by DSC. The Tg value of the TPU phase in the blends increases with increasing PP content, it may be assumed that the TPU/PP system is partially miscible.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo

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