Effect of mixed size particles reinforcing on the thermal and dynamic mechanical properties of Al₂O₃/PPS composites

Abstract

Thermal and dynamic mechanical properties of polyphenylene sulfide (PPS) composites that were reinforced with different sized alumina (Al2O3) particles were studied. These composites were manufactured with two different sizes of Al2O3 particles 1 and 63 µm, using microcompounding and injection molding. Monosized Al2O3 particles reinforced up to 25 wt% loading content and mixed size Al2O3 particles reinforced at 15 wt% loading content as following particle weight proportions: 75% × 63 μm + 25% × 1 μm, 50% × 63 μm + 50% × 1 μm, 25% × 63 μm + 75% × 1 μm. Particle distribution investigations were performed by microcomputerized tomography (micro‐CT). Thermal properties were analyzed by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) methods and also dynamic mechanical properties were investigated by dynamic mechanical thermal analysis (DMTA) method. The results showed that mixed size Al2O3 particle reinforced composites showed a great enhancement in dynamic mechanical properties without significant change in thermal properties. It was concluded that mixed size particles showed a great synergy to give better results compared with monosized particle reinforced composites. POLYM. COMPOS., 37:3219–3227, 2016. © 2015 Society of Plastics Engineers

Estudo da incorporação de material laterítico ferroaluminoso na taxa de queima de compósito de matriz termofixa

“…Tabela 2: Diâmetros de referência (μm). Analisando os valores dos diâmetros de referência para o material inorgânico nota-se que 90 % deste material contém partículas com tamanho inferior a 34,4 μm, o que garante uma faixa de trabalho com diâmetro médio de 23,5 μm, dentro da região esperada para melhor efeito na flamabilidade, conforme descrito por ÇOBAN [23]. Tais características são de fundamental importância, pois influenciarão em parâmetros como a permeabilidade, resistência e densidade do material, bem como em sua dispersão na matriz polimérica.…”

Study of the influence of PPS, PAEK, and PEEK thermoplastic matrices on the static mechanical behavior of carbon fiber‐reinforced composites

“…This characteristic is very useful for components used inside aircraft. [10][11][12][13][14][15][16][17] Stoefler and collaborators 18 studied PPS composites with 40% CF with gains in mechanical properties such as tensile strength, elastic modulus, and deformation at break, compared to neat PPS. These authors observed good fiber-matrix adhesion, even without any surface treatment of the CF reinforcement, with fiber rupture being the predominant failure in traction.…”

“…Due to the conformation of its macromolecules, it can reach a high crystallinity degree (~60%) and it is inherently flame retardant and with low smoke emission, as PPS tends to carbonize with increasing temperature. This characteristic is very useful for components used inside aircraft 10–17 . Stoefler and collaborators 18 studied PPS composites with 40% CF with gains in mechanical properties such as tensile strength, elastic modulus, and deformation at break, compared to neat PPS.…”

Crystallization and mechanical properties of polyphenylene sulfide/multiwalled carbon nanotube composites

“…In this case, PPS was mostly blended with microscale and nanoscale fillers to overcome these disadvantages and extend their applications. 12,13 For the purpose of preparing high-performance PPS-based composites, many researchers have investigated the surface modification of micro/nanoscale fillers to improve their dispersions in PPS.…”