Rheological, mechanical, thermal and barrier properties of highly elastic polyurethane/zinc ionomer composite films

Abstract

Polyurethane (PU) and zinc ionomer (ZnI)-based polymer composites films were developed by melt extrusion method. The structure, phase morphology, rheology, and mechanical properties of the PU/ZnI blends were studied. The X-ray diffraction analysis displaced that there is no major effect on the crystallinity of PU phase by the addition of ZnI. Scanning electron microscopic images confirmed the partial miscibility of PU and ZnI, which greatly influenced on the tensile and elongation at break (EB) properties of the composite films at a high ratio. Dynamic mechanical analysis indicated that with increasing the ZnI content, the storage modulus of the blends decreased and exhibited two T g temperature peaks. Tensile strength of the PU/ZnI composites decreased drastically and EB increased significantly by the addition of ZnI, however a degree of interaction has been found. PU/ZnI composite films improved surface hydrophobic with excellent water barrier properties. The ultraviolet transmittance of the PU increased with increasing the content of ZnI.

Polyurethane-urea-amide-based triblock copolymer contains functionalized polystyrene: Synthesis, characterization and solvent resistivity study

“…[1][2][3] and present of different type of soft and hard segments is responsible for the PU chain flexibility which is essential for the above said applications. [4][5][6][7] To date, thermoplastic polymer is being synthesized by varying hard and soft segments for different applications. 6,[8][9][10] There hasn't been much research into thermoplastic polyurethane (TPU) with various functional groups, and the existence of a functional group in TPU can decide its applications and uses.…”