Tyndall Effect
The Tyndall effect makes a light beam visible through scattering by fine particles suspended in a gas or liquid. The …
Amphoteric Oxides
Amphoteric oxides react with both acids and bases to form salts and water. Al2O3 + 6HCl = 2AlCl3 + 3H2O; Al2O3 + 2NaOH = …
Open Questions in the Elasticity of Silicone Rubber Pads
Glass-fibre reinforced silicone pads serve as PCB press cushions, yet rubber elasticity theory still has open questions: …
Thermal Conductivity of Common Materials and a Heat-Flow Example
Thermal conductivity, in W/(m·K), shows how readily a material conducts heat. Reference values for common materials, …
Liquid Silicone Rubber Types: One-Part, Two-Part, Condensation and Addition Cure
Liquid silicone rubber is grouped by packaging (one-part or two-part) and by cure chemistry (condensation or addition), …
Basic Properties of Silicon: Physical Data and Electron Configuration
Silicon is a metalloid with atomic number 14, melting at 1414°C and boiling at 3265°C, with a diamond cubic structure. …
Electron Shells and Orbitals: Capacity, Energy and Filling Order
Electrons sit in shells and orbitals: the K, L and M shells hold up to 2, 8 and 18 electrons, and each orbital holds …
HTV and RTV Silicone Rubber: Classification by Cure Method
Silicone rubber is classed by cure method: HTV, a high molecular weight gum molded at about 160°C, and RTV, a liquid …
Periodic Trends in Atomic Properties: Ionization Energy and Electronegativity
Ionization energy rises in a sawtooth pattern across a period and peaks at the noble gases. Covers the periodicity of …
Peroxide Crosslinking Efficiency E and How It Differs in Silicone Rubber
Crosslinking efficiency E of an organic peroxide is the rubber's network density divided by the radical concentration. …
Rubber Vulcanization and Crosslinking: Three Ways to Cure
Vulcanization turns linear rubber molecules into a three-dimensional network, changing mechanical properties and …
Silicon, Silica and Silicone: Telling the Three Terms Apart
Silicon, silica (silicates) and silicone are often confused. Covers silicon in the crust, quartz versus feldspar, what …