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[交流]
【求助】 关于PVP的溶解性问题
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请教各位虫子： 在乙醇中溶解少量的Ca(NO3)2，再加入PVP(Mw=1 300 000)后不溶解。 请问这是什么原因？ 请达人指教~~~谢谢~~~ [ Last edited by yogidan on 2008-7-15 at 15:24 ] |
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585685
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１Polyvinylpyrrolidone (PVP, povidone, polyvidone) is a water-soluble polymer made from the monomer N-Vinylpyrrolidone: ２PVP is soluble in water and other polar solvents. In water it has the useful property of Newtonian viscosity. When dry it is a light flaky powder, which readily absorbs up to 40% of its weight in atmospheric water. In solution, it has excellent wetting properties and readily forms films. This makes it good as a coating or an additive to coatings. ３Polyvinylpyrrolidone exists as powder or aqueous solution. It can be dissolved in water and varieties of organic solvent and its hygroscopic ability, film-forming Capability, complexing ability and physiology compatibility are good 具体的资料没有，但是靠自己去找，零散的．我给你个国外网站，去看看（专讲ＰＶＰ的） http://en.wikipedia.org/wiki/Polyvinylpyrrolidone 还有一个：http://www.specialchem4adhesives ... x?id=key-properties 还有一个：http://www.jtbaker.com/msds/englishhtml/p5290.htm [ Last edited by 585685 on 2008-8-22 at 16:50 ] |
5楼2008-08-22 16:42:57
chenhao19851231
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2楼2008-08-22 15:57:12
585685
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3楼2008-08-22 16:28:35
chenhao19851231
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4楼2008-08-22 16:31:32
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