Naslov
Mechanical and interfacial properties of compatibilized polyurethane blends

Autori
Ocelić Bulatović, Vesna ; Mihaljević, Antonia ; Govorčin Bajsić, Emi

Izvornik
Polymer engineering and science (0032-3888) 58 (2018), 11; 1911-1922

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

Ključne riječi
blends ; compatibilization ; mechanical properties ; morphology ; thermal properties ; interface

Sažetak
The effects of two different styrene– ethylene/butylene-styrene (SEBS ; SEBS-g-MA) block copolymers as potential compatibilizers for thermoplastic polyurethane/isotactic polypropylene blends (TPU/iPP), at different composition were investigated. The compatibilizers involved are unfunctionalized SEBS and functionalized grades containing maleic anhydride grafted to the midblock (SEBS- g- MA). Compatibility of each TPU/iPP/SEBS and TPU/iPP/SEBS-g-MA polymer blend was compared investigating mechanical, morphological, thermal and interfacial properties. From the results of the interfacial surface free energy, SEBS-g-MA is optimal compatibilizer which located at the interface of TPU and iPP phase exhibited much better synergy and improved the compatibility between the TPU and iPP phase. Accordingly, TPU/iPP/SEBS-g-MA showed better mechanical properties (higher tensile strength, elongation at break and E modulus) and finer and more stable morphologies that were clearly observed by scanning electron microscopy. The thermogravimetric analysis confirmed these results showing pronounced thermal stability by addition of functionalized compatibilizer.

Izvorni jezik
Engleski

Znanstvena područja
Kemijsko inženjerstvo, Interdisciplinarne tehničke znanosti

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