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  • Fabrication of Aliphatic Water-Soluble Polyurethane Composites with Silane Treated CaCO3.

Fabrication of Aliphatic Water-Soluble Polyurethane Composites with Silane Treated CaCO3.

Polymers (2020-04-03)
Eyob Wondu, Zelalem Chernet Lule, Jooheon Kim
ABSTRACT

In the present study, composites of water-soluble polyurethane/calcium carbonate (CaCO3) were prepared from a soft segment of hydroxyl-terminated polybutadiene (HTPB) and polyethylene glycol (PEG, average molecular weight = 4000) with aliphatic diisocyanates. The functionality of CaCO3 particles was modified using aminopropyltriethoxysilane (APTES), and was confirmed by Fourier-transform infrared spectroscopy (FTIR). The solubility, hydrophilic properties, and chemical structures of the composites were analyzed by water-solubility tests, contact angle measurements, and FTIR, respectively, and the successful production of the hydrophilic water-soluble polyurethane (WSPU) structure was demonstrated. The adhesion of surface-modified CaCO3 particles to the WSPU matrix and the thermal degradation properties of the neat WSPU and WSPU/CaCO3 composites were studied using field emission scanning electron microscopy (FE-SEM) and thermogravimetric analysis (TGA). The results demonstrated good adhesion of the surface-modified CaCO3 particles along with an improved thermal degradation temperature with the addition of CaCO3 particles to the WSPU matrix.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
2,2-Bis(hydroxymethyl)propionic acid, 98%
Sigma-Aldrich
Isophorone diisocyanate, 98%, mixture of isomers