标题：Studies on the Effect of Concentration of Hydroxyl-Terminated Polybutadiene (HTPB) on the Physico-Thermal and Physico–Mechanical Properties of Blends of Isocyanate-Terminated Prepolymer from Epoxy Novolac Resin and HTPB
期刊名称：International Journal of Innovative Research in Science, Engineering and Technology
印刷版ISSN：2347-6710
电子版ISSN：2319-8753
出版年度：2016
卷号：5
期号：3
页码：3560
DOI：10.15680/IJIRSET.2016.0503151
出版社：S&S Publications
摘要：Six blend samples of isocynate-terminated modified epoxy novolac (IEN) and varying concentration ofhydroxyl-terminated polybutadiene (HTPB) ranging between zero to 15 wt% (i.e., 0, 3.0, 6.0, 9.0, 12, and 15% ofHTPB) were prepared in two stages at 120C for 120 min. The catalyst, tetra – n – butyl ammonium iodide (TBAI),was added (approximately 1% by weight of the mixture) at this stage and the temperature of the reaction mixture waskept at 160C for another one and half-hours, and finally, the required sample with increased viscosity was obtained forfurther studies. The epoxy novolac resin (EN) was prepared by the reaction of epichlorohydrin and novolac resin (N) inpresence of 40% methanolic sodium hydroxide as catalyst. The synthesized resin samples were characterized by FTIRanalysis. The curing of the IEN samples was done dynamic differential scanning analyzer (DSC). Tensile strength,tensile modulus and elongation at-break were measured on UTM whereas the impact strength was measured on Izodimpact tester. The relative thermal stability of the samples was checked by thermogravimetric analyzer (TGA).
