Abstract
Filler effects on H2 diffusion in nitrile butadiene rubbers (NBRs) blended with carbon black and silica fillers of different concentrations are first investigated by employing a volumetric analysis. Total uptake, solubility, and diffusivity of hydrogen for ten filled-NBR, including neat NBR, are determined in an exposed pressure range of 1.3 MPa~92.6 MPa. Filler dependence on hydrogen uptake and diffusion is distinctly observed in the NBRs blended with high abrasion furnace (HAF) carbon black (CB) fillers compared to NBRs blended with medium thermal furnace (MT) CB and silica filler, which is related to the specific surface area of carbon black and interface structure. The HAF CB filled-NBR follows dual sorption behavior combined with Henry’s law and the Langmuir model, responsible for two contributions of solubility from polymer and filler. However, a single gas sorption behavior coming from the polymer is observed satisfying Henry’s law up to 92.6 MPa for NBR blended with MT CB filled-NBR and silica filled-NBR. Diffusion demonstrates Knudsen and bulk diffusion behavior below and above, respectively, at certain pressures. With increasing pressure, the filler effect on diffusion is reduced, and diffusivity converges to a value. The correlation observed between diffusivity and filler content (or crosslink density) is discussed.
Highlights
Hydrogen Energy Materials Research Center, Korea Research Institute of Standards and Science, Department of Biochemical and Polymer Engineering, Chosun University, Gwangju 61452, Korea; Department of Physics and Research Institute of Natural Science, Gyeongsang National University, Rubber Research Division, Korea Institute of Footwear & Leather Technology, Busan 47154, Korea; Abstract: Filler effects on H2 diffusion in nitrile butadiene rubbers (NBRs) blended with carbon black and silica fillers of different concentrations are first investigated by employing a volumetric analysis
The filler effects on blended with and silica fillers are systematically investigated as a function pressure, NBR blended with carbon black (CB) and silica fillers are systematically investigated as a of function of filler spices and filler concentration
NBR composites composites displays acteristics depending on filler species and contents
Summary
The reinforcement of elastomers improves physical properties such as tear strength, tensile strength, hardness, abrasion resistance and thermal properties. A wide variety of particulate fillers are used in the rubber polymer industry for various purposes, of which the most important are reinforcement, reduction in material costs, and improvements in processing [5,6]. Physical properties such as volume swelling, density, and the glass transition temperature of rubber vulcanizates are improved by strengthening with fillers such as carbon black (CB) [7] and silica [8]. Synthetic silica is currently extensively used to improve physical and mechanical parameters, such as tensile strength and elongation of silicone rubber vulcanizates [12]
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
