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Sheets are usually made by film blowing, or some other technique which involves uniaxial or biaxial stretching followed by rapid cooling. The cooling (and, usually, crystallisation) of the material is usually so fast that the polymer chains have no chance to relax from their elongated state. In the film or sheet, the chains are now frozen in in their ...


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Although natural rubber and synthetic rubber display a poor chemical resistance to alkanes among others, they do not dissolve in alkanes. Your GC/MS traces (I believe that so because of alkane/alkene identification) have confirmed that since they have shown n-heptane as the main peak (I believe everything else are trace amounts exhibiting below your set-up ...


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"Lead crystal" usually refers to glass cut decoratively to partly resemble the facets of a cleaved crystal, so it's not really misleading, considering that most people recognise crystals by their faceted shape rather than their internal structure. I looked into "crystalline glass" after being astonished at this term in a promotion involving what looked like ...


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The vapor pressure of sodium vapor is approximately 1.08 E-27 Pascals or 1.08 E-32 Bar at 25 C or 298.15 K, slightly above room temperature. Vapor pressure is so low that the saturated vapor density is 2.55 E-35 grams/cu. cm. with 99.99 % ClNa and 0.01% Cl2Na2 dimer fraction in the vapor. There are only 2.63 E-10 molecules of ClNa Vapor with 3 E-14 moles ...


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