Effect of Aliphatic Diisocyanate and Aromatic Diisocyanate on the Properties of Castor Oil-Based Polyurethanes
Journal Title: IOSR Journal of Applied Chemistry (IOSR-JAC) - Year 2018, Vol 11, Issue 7
Abstract
The Study Deals The Effect Of Increasing NCO/OH Molar Ratio On The Physico-Mechanical Properties Of Isocyanate Terminated Polyurethane Prepolymer. The Prepolymer Was Prepared Using Castor Oil With Toluene-2,4-Diisocyanate And Hexamethylene Diisocyanate. The NCO/OH Molar Ratio Has Been Varied From 1.6 To 2.0. The Formation Of The Prepolymer Was Confirmed By Uvand FTIR Spectroscopy. To Investigate The Effect Of Increasing NCO/OH Molar Ratio On Mechanical Properties Of The Isocyanate Terminated Polyurethane Prepolymers. It Shows The Effect Of Increasing NCO/OH Molar Ratio On The Tensile Strength, Tensile Modulus And Percent Elongation Of The Polyurethane Film. The Results Reveal That The Curing Time Of The Prepolymer Decreased With Increase In NCO/OH Molar Ratio. When NCO/OH Molar Ratio Increased, The Tensile Strength Of The Polyurethane Film Increased, While Percent Elongation Decreased Due To Increase In Hard Segment Content. The Swelling Data Of PU films With Different NCO/OH Molar Ratios Are Illustrated . PU film Demonstrated The Maximum Swelling Coefficient Value In Tetrahydrofuran (THF) As Compared With Other Solve. The Thermal Stabilities Of These Pus Were Confirmed By Thermal Analysis Techniques (TG//DTA).
Authors and Affiliations
K. Rathika, S. Begila David
Keywords
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- EP ID EP414362
- DOI 10.9790/5736-1107035259.
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