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Pridružen/-a: 10.01. 2017, 10:56
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 Objavljeno: 08 Jan 2018 11:34 Naslov sporočila: Epoxy resin properties |
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| <p>Epoxy resin has a variety of models, each with a different performance, its performance can be determined by the characteristics of indicators. Epoxy equivalent (or epoxy value): Epoxy equivalent (or epoxy value) is the most important characteristic index of epoxy resin, which indicates the content of epoxy in resin molecule. Epoxy equivalent means the mass grams of plastic composite timber decking supplier in uae epoxy resin containing 1 mol of epoxy groups, expressed as EEW. The epoxy value refers to the number of moles of epoxy groups in 100 g of epoxy resin. Epoxy equivalent = 100 / epoxy value Determination of epoxy equivalent of chemical and spectroscopic methods.</p><p> The international common chemical analysis perchloric acid method, there are other hydrochloric acid acetone method, a variety of epoxy resin models, each with different properties, the performance can be determined by the characteristics of indicators. Epoxy equivalent (or epoxy value): Epoxy equivalent (or epoxy value) is Anti-Slip Decking Boards Northern Ireland the most important characteristic index of epoxy resin, which indicates the content of epoxy in resin molecule. Epoxy equivalent means the mass grams of epoxy resin containing 1 mol of epoxy groups, expressed as EEW. </p><p>The epoxy value refers to the number of moles of epoxy groups in 100 g of epoxy resin. Epoxy equivalent = 100 / epoxy value Determination of epoxy equivalent of chemical and spectroscopic methods. The internationally accepted method of chemical analysis of perchloric acid method, there are other hydrochloric acid acetone method, pyridine how to cover a railroad tie retaining wall hydrochloride and hydrochloric acid dioxane method. </p><p>Acetone method is simple, easy to get reagents, easy to use. The method comprises the following steps of accurately weighing 0.5-1.5g resin in a stopper conical flask, adding 20mL acetone solution (1mL hydrochloric acid with a relative density of 1.19 in 40mL acetone) with a pipette, shaking with stirring to make the resin Completely dissolved, placed in the shade for 1 hour, hydrochloric acid and epoxy groups generated chlorohydrin, after adding methyl red indicator 3 drops, with 0.1mol / L NaOH solution titration excess hydrochloric nobel house flooring material china acid to red fade to yellow For the end. The same operation, without resin, make a blank test.</p> |
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