蔡少康 Cai

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Questions related from 蔡少康 Cai

Why does EVA alcoholysis product evoh fail to dissolve in DMSO when determining nuclear magnetism?

The purchased EVA (VA content 40%) product is dissolved in toluene solution, and then a mixture of sodium hydroxide and alcohol is added, the concentration is about 1mol/l and 0.25mol/l. The...

22 December 2023 8,915 3 View

Why does EVA alcoholysis product evoh fail to dissolve in DMSO when determining nuclear magnetism?

使用购买的EVA（VA含量40%）产品，在甲苯溶液中溶解，然后添加了氢氧化钠和醇的混合溶液，浓度大概有1mol/l和0.25mol/l的。产品测试红外结果较为正常，但是在DMSO中一直无法溶解，困扰了很久。有没有做这方面研究的大佬可以解答一下或者讨论一下。是否自己合成的EVA再去做EVOH会好溶于dmso一些。

22 December 2023 7,528 0 View

The solubility of EVOH in dmso, how to determine the nuclear magnetic insoluble solution?

Do you have any problems with evoh that do not dissolve? How to solve the problem? I used the EVA I purchased to make EVOH under many conditions, which were very difficult to dissolve, and it was...

01 January 1970 4,779 0 View

What are the useful methods for the hydroxyl content in evoh besides nuclear magnetism?

evoh has been unable to dissolve in the determination of nuclear magnetism, the use of DMSO solvent, in addition to nuclear magnetism there is any better method for the determination of hydroxyl...

01 January 1970 912 0 View