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Nitrile rubber, also known as nitrile butadiene rubber, NBR, Buna-N, ... For low-temperature performance, low ACN grades should be used; high-temperature performance ...
The structure of a nitrile: the functional group is highlighted blue. In organic chemistry, a nitrile is any organic compound that has a −C≡N functional group.The name of the compound is composed of a base, which includes the carbon of the −C≡N, suffixed with "nitrile", so for example CH 3 CH 2 C≡N is called "propionitrile" (or propanenitrile). [1]
The rate of PCB metabolism was temperature dependent in yellow perch (Perca flavescens). In fall and winter, only 11 out of 72 introduced PCB congeners were excreted and had halflives of more than 1,000 days. During spring and summer when the average daily water temperature was above 20 °C, persistent PCBs had halflives of 67 days.
It is better for lower pressures than nitrile rubber and chemically much more inert. It is bakeable to 200 °C. It is bakeable to 200 °C. FFKMs ( FFPMs ) very low out-gassing similar to PTFE and withstands baking temperatures up to 300 °C, while chemically one of the most inert sealing elastomers.
Cold rubber, or cold polymerized rubber, is synthetic rubber (especially, SBR and NBR) emulsion polymerized at a relatively low temperature. Cold rubber may be polymerized at temperatures of about -18°C to 5°C, as opposed to "hot rubber" polymerized at higher temperatures around 50°C. [ 1 ]
30 varnished silicon steel foils each of thickness 0.014 inches (0.356 mm): density 7.36 g cm −3; measured near a temperature of 358.2 K under pressure in the range 0 — 132 psi: 0 psi 0.512 w m −1 K −1 20 psi 0.748 40 psi 0.846 60 psi 0.906 80 psi 0.925 100 psi 0.965 120 psi 0.992 132 psi 1.02 120 psi 1.00 100 psi NA* 80 psi 0.984 60 ...