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1.3- Butadiene rubber

Any fertilizer materials are minerals and have certain hardness values and therefore cause wear. Other plant nutrient salts or chemicals, particularly in the presence of moisture, will additionally produce corrosion. It is apt in this context to know some details of the scratch hardness of minerals which cause wear and abrasion, and this is normally measured in terms of Mohs scale [8]. [Pg.95]

The Mohs hardness scale was developed in 1822 by Frederich Mohs. This scale is a chart of relative hardness of the various minerals (1-softest to 10-hardest) See table 5.2 below. He selected the ten minerals because they were common or readily available. The scale is not a linear scale, but somewhat arbitrary. [Pg.95]

Mohs hardness is a measure of the relative hardness and resistance to scratching between minerals. Other hardness scales rely on the ability to create an indentation into the tested mineral (such as the Rockwell, Vickers, and Brinell hardness - these are used mainly to determine hardness in metals and metal alloys). The scratch hardness is related to the breaking of the chemical bonds in the material, creation of micro fractures on the surface, or displacing atoms in the metals of the mineral. Generally, minerals with covalent bonds are the hardest while minerals with ionic, metallic, or van der Waals bonding are much softer. [Pg.96]

The effects of high hardness are important in many fields. Abrasives are used to form and polish many substances. Diamonds are an important mineral component in cutting tools for the manufacturing of metals and other substances, forming dies for the drawing of wires, and for cutting cores in oil wells and mineral exploration. Emery - a variety of corundum, is used in many abrasive products that do not require the hardness (or expense) of diamond tools. Garnets were used as an abrasive in sandpaper. Talc is an extremely soft mineral that has been used in bath powders (talcum powder). [Pg.97]

Mineral hardness is also important in sedimentary rocks. Harder minerals tend to be able to travel longer distances down river systems. Quartz can often undergo several cycles of erosion, transportation and lithification (change of sediments to rock). [Pg.97]

SBP spirits Special boiling point spirits. SBR Styrene butadiene rubber. [Pg.352]

Styrene is manufactured by alkylating benzene with ethene followed by dehydrogenation, or from petroleum reformate coproduction with propylene oxide. Styrene is used almost exclusively for the manufacture of polymers, of which the most important are polystyrene, ABS plastics and styrene-butadiene rubber. U.S. production 1980 3 megatonnes. [Pg.374]

The elastomer produced in greatest amount is styrene-butadiene rubber (SBR) Annually just under 10 lb of SBR IS produced in the United States and al most all of it IS used in automobile tires As its name suggests SBR is prepared from styrene and 1 3 buta diene It is an example of a copolymer a polymer as sembled from two or more different monomers Free radical polymerization of a mixture of styrene and 1 3 butadiene gives SBR... [Pg.408]

Nitrile rubber is also known as nihile-butadiene rubber (NBR), government rubber nitrile (GRN), and Buna N. [Pg.1063]

Styrene-butadiene rubber is prepared from the free-radical copolymerization of one part by weight of styrene and three parts by weight of 1,3-butadiene. The butadiene is incorporated by both 1,4-addition (80%) and 1,2-addition (20%). The configuration around the double bond of the 1,4-adduct is about 80% trans. The product is a random copolymer with these general features ... [Pg.1065]

Styrene-butadiene rubber (SBR) is also known as government rubber styrene (GRS) and Buna S. [Pg.1066]

Styrene-butadiene rubber (SBR) (also known as Buna S) 0.94 40-100 400-600 1600-3700 -60 107... [Pg.1067]

Polymers of chloroprene (structure [XII]) are called neoprene and copolymers of butadiene and styrene are called SBR, an acronym for styrene-butadiene rubber. Both are used for many of the same applications as natural rubber. Chloroprene displays the same assortment of possible isomers as isoprene the extra combinations afforded by copolymer composition and structure in SBR offsets the fact that structures [XIIll and [XIV] are identical for butadiene. [Pg.29]

COLORANTS FORFOOD,DRUGS,COSTffiTICS AND TffiDICALDEVICES] (Vol 6) ESBR See Emulsion styrene-butadiene rubber. [Pg.370]

SAN copolymers [ACRYLONITRILE POLYTffiRS - SURVEY AND SAN (STYRENE-ACRYLONITRILECO-POLYTffiRS)] (Vol 1) -SBRfrom [STYRENE-BUTADIENE RUBBER] (Vol 22)... [Pg.938]

Polysar North America Vinjl butadiene rubber T aktene Li—alkyl... [Pg.232]

Styrene—Butadiene Rubber (SBR). This elastomer is used primarily in tires, vehicle parts, and electrical components. [Pg.487]

See other pages where 1.3- Butadiene rubber is mentioned: [Pg.374]    [Pg.408]    [Pg.1006]    [Pg.1065]    [Pg.1069]    [Pg.117]    [Pg.136]    [Pg.136]    [Pg.138]    [Pg.239]    [Pg.361]    [Pg.361]    [Pg.361]    [Pg.370]    [Pg.392]    [Pg.456]    [Pg.483]    [Pg.576]    [Pg.677]    [Pg.682]    [Pg.860]    [Pg.870]    [Pg.871]    [Pg.871]    [Pg.884]    [Pg.897]    [Pg.914]    [Pg.923]    [Pg.939]    [Pg.939]    [Pg.939]    [Pg.939]    [Pg.939]    [Pg.939]    [Pg.957]    [Pg.23]    [Pg.231]   
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