Renewable resource based polyurethane PU derived from castor oil influence of modification of PU and incorporation of nanoparticles on performance characteristics

Abstract

The unique combination offlexibility, impact strength, abrasion resistance, low curing temperature,chemical resistance, tensile strength and stiffness makes polyurethane (PU) to be employed for the preparation of newlineversatile products.PU is a potential candidate for the preparation of newlinebiomedical products, coatings, foams, footwear soles, textiles, adhesives, newlinesealants and elastomers due to their inherent biocompatibility, good newlinemechanical propertiesand the possibility of variation in its composition. The newlinemajority of polyols used for the synthesis of PU are derived from the newlinepetroleum based products, which leads to the negative environmental impacts. newlinePU synthesized from the renewable resources can contribute towards a newlinesustainable development in the area of chemistry.Therefore aconsiderable newlineamount of research work has been accomplished concerning with the newlinesynthesis of PU from renewable resources. Polymers from renewable resources are being widely produced in the present era for the sustainable development of environmental benign products. Among vegetable oils, castor oil is very much attracted to the world market, because of the presence of inherent hydroxyl functionality and the unsaturation which enables castor oil for the chemical derivatization. PU can be synthesized with and without the modification of castor oil. The properties of PU depend on the type of polyols and diisocyanates, NCO:OH ratio, nature of chain extender, type of catalyst, and size and distribution of hard and soft domains. newline newline