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A C 62 derivative [C 62 (C 6 H 4-4-Me) 2] synthesized from C 60 and 3,6-bis(4-methylphenyl)-3,6-dihydro-1,2,4,5-tetrazine. The C 60 molecules can also be coupled through a [2+2] cycloaddition, giving the dumbbell-shaped compound C 120. The coupling is achieved by high-speed vibrating milling of C 60 with a catalytic amount of KCN.
A tube of commercial graphite powder lubricant with molybdenum disulfide additive (called "molybdenum") [33] Due to weak van der Waals interactions between the sheets of sulfide atoms, MoS 2 has a low coefficient of friction. MoS 2 in particle sizes in the range of 1–100 μm is a common dry lubricant. [34]
The branched properties result in a modified paraffin with a higher viscosity, smaller crystalline structure, and modified functional properties. Pure paraffin wax is rarely used for carving original models for casting metal and other materials in the lost wax process , as it is relatively brittle at room temperature and presents the risks of ...
The closed fullerenes, especially C 60, are also informally called buckyballs for their resemblance to the standard ball of association football ("soccer"). Nested closed fullerenes have been named bucky onions. Cylindrical fullerenes are also called carbon nanotubes or buckytubes. [1] The bulk solid form of pure or mixed fullerenes is called ...
It is composed of hydrocarbon molecules that typically contain between 6-20 carbon atoms per molecule, [12] predominantly containing 9 to 16 carbon atoms. [ 13 ] Regardless of crude oil source or processing history, kerosene's major components are branched- and straight-chain alkanes (hydrocarbon chains) and naphthenes (cycloalkanes), which ...
The dielectric constant of mineral oil ranges from 2.3 at 50 °C (122 °F) to 2.1 at 200 °C (392 °F). [22] Electric space heaters sometimes use mineral oil as a heat transfer oil. Lubricants used for older refrigerator and air conditioning compressors are based on mineral oil, especially those using R-22 refrigerant.
A lubricant, aka lube, is a liquid, made of silicone, water, or oil, used during sexual activity to reduce friction by making the genital skin feel smoother, either solo or with a partner, says ...
Sodium dodecyl sulfate (SDS) or sodium lauryl sulfate (SLS), sometimes written sodium laurilsulfate, is an organic compound with the formula CH 3 (CH 2) 11 OSO 3 Na and structure H 3 C−(CH 2) 11 −O−S(=O) 2 −O − Na +. It is an anionic surfactant used in many cleaning and hygiene products. This compound is the sodium salt of the 12 ...