Abstract:
NBR is extensively used in various applications such as automotive, seals and gaskets,
cable insulation and protective gloves etc. However, its high flammability limits its
application in many fields. Nano-clays hold a significant position among the nano flame
retardant filler in the domain of polymer composites due to high surface to volume ratio
that required less amounts of nano-clay to obtain require properties. They possess a
potential to increase the flame retardant, thermal durability as well as improve their
mechanical strength of polymers. Halloysite nanotubes (HNTs) are naturally
biodegradable flame retardant material. Halloysite nanotubes (HNTs) possess a
nanotubular structure within the context of 1:1 clay. HNTs show inadequate
dispersibility and weak interfacial interaction when integrated with polymers. To solve
this problem, silane treatment was introduced which used 3-
aminopropyltriethoxysilane (APTES), formed functionalized halloysites nanotubes
(fHNTs) and subsequently utilized as a substrate to immobilize H4SiW12O40. The final
nanofiller was prepared which confirmed by Fourier-transform infrared spectroscopy
(FTIR), scanning electron microscopy (SEM), and X-ray diffraction (XRD). Different
rubber nanocomposites samples NBR-0 ,NBR-1, NBR-3, NBR-5, NBR -7, NBR-
7HNTs, NBR-7POMs and NBR-10 were prepared by varying amount of nanofiller into
NBR via melt blending in an internal mixer. The structural and morphological
characteristics of these composites were analyzed by using SEM , FTIR , Raman
spectroscopy and XRD. The mechanical property was characterized by using universal
testing machine (UTM) and flame retardant property was evaluated by using UL-94,
NBR-10 falls under the category of V-2 due char formation and gas particle which delay
fire ignition phenomenon.
