Industrial and Manufacturing Chemistry; Organic, a Practical Treatise

Industrial and Manufacturing Chemistry; Organic, a Practical Treatise

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1913 edition. Excerpt: ...and a temperature of 20 C. Comparative determinations only are necessary, the viscosity of pure benzene being taken as I. They showed that a straight line law is obeyed for dense solutions between the viscosity and concentration, and thus by assuming a concentration of 100 per cent, they were able to obtain values for solid matter. These observers conclude that within the same species viscosity measurements vary directly with strength and "vulcanising capacity," and that even when comparing species with species high viscosity indicates strength. Solvents for Rubber.--Strictly speaking, rubber is insoluble in all ordinary solvents. It swells up, however, when mixed with benzol, benzine, carbon bisul phide, carbon tetrachloride, chloro FIG. 159.--Vulcaniser Closed. Flo. 160.--Vulcaniser Open. (David Bridge, Manchester.) form, petroleum-ether, benzaldehyde, camphene, oil of turpentine, caoutchouine (dipentene), etc., and forms what may be termed "colloidal solutions," as distinguished from true solution--the rubber having a sponge or foam-like structure, and the solvent diffusing in by osmose between the walls distends the rubber network into what we call a "solution." Patents cover the production of non-inflammable solutions by using carbon tetrachloride, dichlor-methane, tri-and tetra-chlor ethane or tri-chlor benzol. Acetone and alcohol do not dissolve rubber. Hot Vulcanisation.--The raw rubber obtained as the result of the above sequence of operations first acquires its valuable technical properties when it is " vulcanised" (Goodyear, 1840). This is effected by kneading the rubber while warm with 8-10 percent, of sulphur or antimony sulphide, Sb2S5, together with the other mineral substances, fibres, etc., ...
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Product details

  • Paperback | 360 pages
  • 189 x 246 x 19mm | 644g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236602692
  • 9781236602695