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Dicyclopentadiene, abbreviated DCPD, is a chemical compound with formula C 10 H 12. At room temperature, it is a white brittle wax, although lower purity samples can be straw coloured liquids. The pure material smells somewhat of soy wax or camphor, with less pure samples possessing a stronger acrid odor. Its energy density is 10,975 Wh/l.
Cyclopentadiene production is usually not distinguished from dicyclopentadiene since they interconvert. They are obtained from coal tar (about 10–20 g/t) and by steam cracking of naphtha (about 14 kg/t). [8] To obtain cyclopentadiene monomer, commercial dicyclopentadiene is cracked by heating to around 180 °C.
Cp 2 Fe 2 (CO) 4 was first prepared in 1955 at Harvard by Geoffrey Wilkinson using the same method employed today: the reaction of iron pentacarbonyl and dicyclopentadiene. [7] [8] 2 Fe(CO) 5 + C 10 H 12 → (η 5-C 5 H 5) 2 Fe 2 (CO) 4 + 6 CO + H 2. In this preparation, dicyclopentadiene cracks to give cyclopentadiene, which reacts with Fe(CO ...
Tammann temperature was pioneered by German astronomer, solid-state chemistry, and physics professor Gustav Tammann in the first half of the 20th century. [1]: 152 He had considered a lattice motion very important for the reactivity of matter and quantified his theory by calculating a ratio of the given material temperatures at solid-liquid phases at absolute temperatures.
Melting curve analysis is an assessment of the dissociation characteristics of double-stranded DNA during heating. As the temperature is raised, the double strand begins to dissociate leading to a rise in the absorbance intensity, hyperchromicity. The temperature at which 50% of DNA is denatured is known as the melting temperature. Measurement ...
Polydicyclopentadiene (PDCPD) is a polymer material which is formed through ring-opening metathesis polymerization [2] (ROMP) of dicyclopentadiene (DCPD). PDCPD exhibits high crosslinking, which grants its properties, such as high impact resistance, good chemical corrosion resistance, and high heat deflection temperature.
The melting point (or, rarely, liquefaction point) of a substance is the temperature at which it changes state from solid to liquid. At the melting point the solid and liquid phase exist in equilibrium. The melting point of a substance depends on pressure and is usually specified at a standard pressure such as 1 atmosphere or 100 kPa.
The most well-known form of Stefan problem involves melting via an imposed constant temperature at the left hand boundary, leaving a region [; ()] occupied by water. The melted depth, denoted by s ( t ) {\displaystyle s(t)} , is an unknown function of time.