Certification of the Rheological Behavior of Srm 2490, Polyisobutylene Dissolved in 2, 6, 10, 14-Tetramethylpentadecane (Classic Reprint) - Hardcover
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Excerpt from Certification of the Rheological Behavior of Srm 2490, Polyisobutylene Dissolved in 2, 6, 10, 14-Tetramethylpentadecane<br/><br/>Srm 2490 replaces an earlier material, srm 1490, which consisted of polyisobutylene dissolved in normal hexadecane. Srm 1490 was certified in 1977 but discontinued in 1990 when deviations from the certified properties were identified. Among the possible reasons for the deviation from the certified properties were the packaging of the material and evaporation of the solvent. Srm 1490 was delivered in large (201iter, 5 gallon)p1astic containers, with material transferred to bottles for sale as needed; material taken from different large containers might have led to a difference in properties from one lot of bottles to the next. Similarly, evaporation of the solvent through the plastic containers over time could have led to changes in properties; in the measurements that showed a deviation, the viscosity was found to be higher than the certified value, which is consistent with solvent evaporation. In addition to these problems, the normal hexadecane used as a solvent also limited the useful temperature range of the material, since normal hexadecane crystallizes at 18 Â c (64 bf)
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Certification of the Rheological Behavior of Srm 2490, Polyisobutylene Dissolved in 2, 6, 10, 14-Tetramethylpentadecane (Classic Reprint)
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HRD. Zustand: New. New Book. Shipped from UK. Established seller since 2000. Bestandsnummer des Verkäufers LX-9780331267754
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Certification of the Rheological Behavior of Srm 2490, Polyisobutylene Dissolved in 2, 6, 10, 14-Tetramethylpentadecane (Classic Reprint)
Anbieter: PBShop.store UK, Fairford, GLOS, Vereinigtes Königreich
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