Effect of polyurethane ratio on mechanical behavior of banana fiber/polyurethane-vinylester matrix composites

Abstract

A customary ratio of vinyl ester (VER) and Polyurethane (PU) resin were chosen as the matrix material (blend) to attain the complete Interpenetrating Polymer Networks (IPN). In this course of research, the mechanical properties of the Banana fiber reinforced IPN (blend) matrix were thoroughly investigated by precisely varying the loading of polyurethane into vinylester as 0%, 10%, 20%, 30%, 40%, 50% PU respectively. Besides that, the fabricated banana fiber reinforced polyurethane loaded IPN laminate were experimentally investigated in order to characterize the strength of the laminate as per the ASTM standards. The test results exhibit that, strain rate of the laminate increases to many folds as compared (Tensile 0% PU -0.45% & 50% PU -3.1%, Flexural 0% PU -0.62% & 50% PU -3.73%) with the neat vinylester resin based banana fiber reinforced laminate. In addition to that, it also increases the impact strength and moisture resistance (Impact 0% PU -2.93 kJ/m 2 & 50% PU -8.01 kJ/m 2 , Moisture 0% PU -0.42% & 50% PU -0.96%) of the IPN laminate considerably depends upon the loading of the polyurethane. As well as to validate further, the fractured surfaces were assessed through Scanning Electron Microscope (SEM). Finally the experimental values were also cross-verified by analytical simulation software by using ANSYS. Finally, the cross-verification proved that both the results of experimental and FEA analysis of the material were in good co-relation with each other.

Preparation, characterization, and performance of reactive phenolphthalein poly(aryl ether sulfone) tougheners highly compatible with epoxy resin

“…The flexural properties of a resin system are a measure of the energy absorbed by the material during fracture under static loading 28 . Figure 8ab shows the flexural strength and modulus of C‐PESC3/E51 at different PHR.…”

“…The flexural properties of a resin system are a measure of the energy absorbed by the material during fracture under static loading. 28 to the increase in crosslink density. The flexural modulus was almost unchanged, which was due to the increase in crosslink density caused by the participation of carboxyl groups in curing, thus maintaining the flexural modulus at a high level.…”

Synergistic effects of in situ fibrillated polytetrafluoroethylene and polystyrene–butadiene block on the microcellular foaming behaviors of polyphenylene oxide modified by high‐impact polystyrene

“…9 At present, fiber reinforcement is at the forefront of material research, and its development opens up various possibilities of material modification and enhancing functionality. [10][11][12][13][14][15] Kuram et al compared the mechanical and chemical properties of polypropylene/polyethylene (PP/PE) blends reinforced with glass fibers (GFs) and unreinforced blends and found that the addition of GFs to PP/PE blends is a very effective method to improve their tensile strengths. The tensile strengths of all PP/GF/ PE blends were higher than those of the PP/PE blends.…”