Influence of POSS fillers on the transport properties of natural rubber nanocomposites

Abstract

Three types of polyhedral oligomeric silsesquioxane (POSS)—octaphenyl (OP), POSS@TESPT (TT), and MWCNT@POSS (VC)—were incorporated into natural rubber (NR) to fabricate nanocomposites. The transport properties of POSS–NR nanocomposites were studied through solvent diffusion techniques. Diffusion studies were done with toluene (aromatic solvent) and the influence of nanofiller structure, concentration and compatibility with the NR matrix on various diffusion parameters were analyzed. The fillers that have good interaction with the polymer matrix showed the lowest solvent uptake. The network structure analysis revealed that the polymer chains deformed affinely. The effect of fillers on the chain flexibility was also discussed based on mechanical property studies. POLYM. COMPOS., 40:3020–3031, 2019. © 2018 Society of Plastics Engineers

Development of hydroxyapatite nanoparticles reinforced chlorinated acrylonitrile butadiene rubber/chlorinated ethylene propylene diene monomer rubber blends

“…As the nano‐HA content increases, the blend matrix becomes more rigid due to the increased degree of reinforcement of the nanoparticles. Therefore, the rate of polymer blend chain relaxation becomes slow compared to the concurrent penetrant diffusion and the transport in filled system follow a relaxation‐controlled diffusion process 41 . As usual, the k values in the reinforced composite system are lower than the neat rubber blend due to the reduced solvent‐matrix interactions, which can be attributed to better 'across phase' adhesion through the improved interface.…”

Analysis of diffusion characteristics for aromatic solvents through carbon black filled natural rubber/ butadiene rubber blends

“…They have concluded that equilibrium solvent uptake decreases with increase of CB content due to reduction in free volume 20 . Influence of POSS fillers on transport characteristics of NR was determined by Priya et al 21 wherein fillers with good interaction in polymer matrix showed lowest solvent uptake, which supports studies reported by Maria et al Aminabhavi et al studied the effect of organic liquids on Polyurethane (PU), Chloroprene (CR), NR, NBR, SBR, and ethylene propylene diene rubber. They reported dependency of diffusion parameters on the choice of a solvent molecule and chemical structure of the polymer membrane 22–25 .…”

“…One may observe that “k” value for 50phr CB filled rubber vulcanizates decreases in comparison to neat rubber vulcanizates. As the concentration of CB in 70NR/30BR increases, the “k” values shows a decreasing trend for interaction with benzene and toluene but varies when xylene is used as solvent 21 …”

C30‐45 long‐chain alkyls modified silsesquioxane: A promising additive for polyethylene

“…Polyhedral oligomeric silsesquioxane (POSS), a special type of crystalline silsesquioxane with regular cage-like structures, is often applied as a nanofiller for polymer materials, aiming to improve their mechanical, thermal, and fire retardancy properties. [1][2][3][4][5][6][7] However, though various POSS are commercially available, the cost of POSS remains quite high (one or several US dollar[s] per gram). This highly restricts their real-world applications as nanofillers for commodity polymers, such as polyolefin.…”