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.
Highlights
Polyurethane (PU) composites can be used in adhesive industries, synthetic leathers, construction industries, automotive industries, coatings, etc
The peaks around 1141 and 800 cm−1 of the APTES-treated CaCO3 corresponded to Si–O–C and Si–O–Si, respectively, which indicated that the APTES was attached to the CaCO3 particles
Water-soluble polyurethane (WSPU) composites were prepared from a soft segment of hydroxyl-terminated polybutadiene (HTPB)
Summary
Polyurethane (PU) composites can be used in adhesive industries, synthetic leathers, construction industries, automotive industries, coatings, etc. Present-day research efforts in academia and industry alike are primarily focused on the development of environmentally benign polymer composites [8,10,11,12,13,14]. The development of WSPU composites by the incorporation of various fillers to enhance the thermo-mechanical and adhesion properties while causing low environmental harm and pollution is essential to the present-day research areas in PU industries. X. GaO et al have fabricated WSPU/CaCO3 composites using polypropylene glycol as a soft segment and TDI as hard segment by treating the surface of CaCO3 with oxalic acid. GaO et al have fabricated WSPU/CaCO3 composites using polypropylene glycol as a soft segment and TDI as hard segment by treating the surface of CaCO3 with oxalic acid
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