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Nitrile rubber, also known as nitrile butadiene rubber, NBR, Buna-N, and acrylonitrile butadiene rubber, is a synthetic rubber derived from acrylonitrile (ACN) and butadiene. [1] Trade names include Perbunan, Nipol, Krynac and Europrene. This rubber is unusual in being resistant to oil, fuel, and other chemicals.
The Shore durometer is a device for measuring the hardness of a material, typically of polymers. [ 1 ] Higher numbers on the scale indicate a greater resistance to indentation and thus harder materials.
The term is also used to describe a material's rating on the scale, as in an object having a “‘Shore durometer’ of 90.” When I studied polymer science and technology in 1987, the durometer was the machine which Mr Shore used to devise his set of scales. Certainly in UK and European usage you would say something like
Chemische Werke Buna in 1953, shortly before being transferred into a VEB Buna Werke in 1980 Logo 1954-1990 Under Soviet administration after World War II, Buna Werke Schkopau were expropriated and – under the name Chemische Werke Buna – became part of Sowjetische Aktiengesellschaft (SAG) Kautschuk in order to cover reparation demands of ...
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Polybutadiene can be produced with more than 90% trans using catalysts similar to those of high cis: neodymium, lanthanum, nickel. This material is a plastic crystal (i.e. not an elastomer) which melts at about 80 °C. It was formerly used for the outer layer of golf balls.
One of the best post-Christmas sales we look forward to every year is Nordstrom's Half-Yearly Sale, which typically kicks off the day after Christmas and lasts for a couple of weeks.Ring in the ...
How to Have More Energy: 7 Tips. This article was reviewed by Craig Primack, MD, FACP, FAAP, FOMA. Life can get incredibly busy, and keeping up often hinges on having enough energy.
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