Ethylene‐Octene Copolymer‐Nanosilica Nanocomposites: Effects of Epoxy Resin Functionalized Nanosilica on Morphology, Mechanical, Dynamic Mechanical and Thermal Properties

Abstract

A comparative study of the structural, thermal, mechanical and thermomechanical properties of ethylene-octene copolymer 1 (mPE) 2 nanocomposites synthesized with pure nanosilica (NS) and nanosilica-functionalized with diglycidyl ether of bisphenol-A (ENS) has been reported. These nanocomposites were prepared using ''melt mixing'' method at a constant loading level of 2.5 wt. %. The effects of pure nanosilica (NS) and epoxy resin-functionalized-nanosilica (ENS) on the above mentioned properties of ethylene-octene copolymer were analyzed by wide-angle-x-ray diffractometer (WAXD), transmission electron microscope (TEM), thermo gravimetric analyzer (TGA), differential scanning calorimeter (DSC), dynamic mechanical analyzer (DMA) and scanning electron microscope (SEM). TEM studies have shown a better dispersion of nanoparticles in case of ethylene-octene copolymer-epoxy resinfunctionalized-nanosilica nanocomposite (mPE-ENS) than that of ethylene-octene copolymer-nanosilica nanocomposite (mPE-NS). The tensile tests show that organic modification of nanosilica particles brings up an appreciable increase in yield strength, ultimate tensile strength and elongation at break of the polymer. DMA studies have shown an increase in the storage modulus and glass transition temperature for mPE-ENS with respect to mPE-NS. Further, the TGA results have shown a higher thermal stability for mPE-ENS in comparison to mPE-NS.

Highly Populated and Nearly Monodispersed Nanosilica Particles in an Organic Medium and Their Epoxy Nanocomposites

“…In addition, TGA can be used to provide the actual inorganic particle content in the organic–inorganic materials . Because most of the organic polymer had decomposed before 700 °C in a nitrogen atmosphere (however, inorganic moieties can usually withstand 1000 °C), the char yield should be the actual content of the inorganic part. , Table shows the char yield of the nanosilica–EP nanocomposites over 700 °C; the results approximately correspond to the theoretical inorganic nanosilica particle loadings.…”

Effect of stretching speed on morphologies and properties of in situ microfibrillar POE/PLA composites

“…In the past decades, various inorganic fillers were incorporated into the POE matrix to improve its mechanical properties. [9][10][11][12][13][14][15][16] Addition of inorganic filler improves the tensile strength and modulus of POE; however, its elongation at break is greatly reduced. Therefore, an effective and facile method to improve the mechanical properties of POE needs to be explored.…”

Síntese De Material Nanoestruturado À Base De Resina Epoxídica E Sílica: Estudo Das Propriedades Termomecânicas

“…Este comportamento sugere que a dispersão resultou na maior interação entre a ER e a carga de sílica, promovido pelo alto cisalhamento durante o procedimento de mistura. É conhecido que as nanocargas, como a sílica apresentam forte tendência a aglomeração em virtude da alta energia superficial das nanopartículas inorgânicas (CHEN et al, 2008;REDDY;PATRA;DAS, 2009). Dentre as estratégias para promover a desagregação e dispersão das nanocargas na matriz polimérica, destaca-se o alto cisalhamento obtido pelo uso de dispersores mecânicos na preparação das amostras.…”