Flow behavior of oil-modified polymer solutions

• Published in: Progress in organic coatings 2004-08, Vol.50 (3), p.172-178
• Main Authors: Güner, F.S, Baranak, M, Soytaş, S, Erciyes, A.T
• Format: Article
• Language: English
• Subjects: Applied sciences; Compounding ingredients; Exact sciences and technology; Fillers and reinforcing agents; Oil-modified polymer; Physical properties; Polymer industry, paints, wood; Properties and testing; Rheological properties; Rheology; Sunflower oil; Technology of polymers; Urethane oil; Viscosity
• ISSN: 0300-9440; 1873-331X
• DOI: 10.1016/j.porgcoat.2003.12.004

In this study, the flow behavior of urethane oils prepared with different reactant ratios was determined. For this purpose, in the first step, the viscosities of polymer solutions were determined at different temperatures. Then, Bingham, Power-law and Casson models were tested to express the relationship between τ and γ. Under test conditions, toluene diisocyanate (TDI)-based polymer solutions behaved as non-Newtonian fluids, whereas the polymer solution prepared from poly(1,4-butandiol) tolylene 2,4-diisocyanate terminated prepolymer (PBTDI)-based samples behaved as Newtonian fluids. Additionally, Andrade and Erickson’s equations were tested for investigating the viscosity–temperature and viscosity–concentration relationships, respectively. It was showed that, these equations were available for all polymer solutions. After comparing all results with those of comparative sample we suggested that, the polymer solution prepared from the sample containing high ratio of TDI, could be used in the high solid coating formulation for industrial application.