Structural and Surface Properties of Novel Polyurethane Films

Abstract

In this work, novel polycarbonatediol- and polybutadienediol-based polyurethanes (PU) with promising properties were prepared and compared with an analogous polypropyleneglycol-based product. Hexamethylenediisocyanate was used as isocyanate (NCO) component. All three PU systems were subsequently modified by the incorporation of two different nanofillers (Montmorillonite clays): “Cloisite 15A” and “Bentonite for organic systems.” The PUs were prepared in form of film coatings and characterized by atomic force microscopy (AFM), transmission electron microscopy (TEM), and wide angle X-ray scattering (WAXS). Their chemical microstructure was checked by ¹³C-NMR spectroscopy.

Keywords:

• Montmorillonite
• Nanoadditives
• Polybutadiene diol
• Polycarbonate diol
• Polypropyleneglycol
• Polyurethane

ACKNOWLEDGMENTS

The authors wish to thank the Ministry of Industry and Trade of the Czech Republic (grant FT-TA3/034) and the Grant Agency of the Academy of Sciences of the Czech Republic (grant IAA400500505) for the financial support of this work. Polycarbonate diols were kindly provided by Asahi Kasei Chemical Corporation and poly(butadiene) diols by Kaučuk (now Synthos) Kralupy, a.s.

Notes

Kindly determined by Dr. P. Holler from IMC.

Kindly measured by MSc. M. Pekárek from IMC.

Surface area: the total area of examined sample surface.

(Rms): the standard deviation of the Z values within the given area.

(mean roughness): the mean value of the surface relative to the center place.

(max height): the difference in height between the highest and lowest points on the surface relative to the mean plane.

Mean: the average of all Z values within the enclosed area.