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Pharmaceutical grade polyvinyl alcohol supplies polyvinyl alcohol polyvinyl alcohol pva

 Last Update: 2022-09-08
 Source: Internet
 Author: User

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Pharmaceutical grade polyvinyl alcohol supply polyvinyl alcohol polyvinyl alcohol polyvinyl alcohol pharmaceutical grade polyvinyl alcohol supply polyvinyl alcohol polyvinyl alcohol polyvinyl alcohol polyvinyl alcohol [9002-89-5] polyvinyl alcohol is polyvinyl acetate methanol solution with alkaline added to the alcohol reaction to obtain the product, the molecular formula is (CH2CHOH) n (CH2CHOCOCH3) m indicated, where m + n represents the average degree of polymerization, m / n should be 0 to 0.
35
.

The average molecular weight of this product should be 20000~220000
.

【Properties】This product is white to slightly yellow powder or translucent granules
.

This product is dissolved in hot water and is almost insoluble
in ethanol or acetone.

Polyvinyl alcohol appears as a white powder, flake or flocculent
.

Glass conversion temperature 60 ~ 85 °C
.

Polyvinyl alcohol contains many alcohol groups, has properties, and can form hydrogen bonds with water, so it can be soluble in sexual water
.

Polyvinyl alcohol can also be soluble in hot hydroxyl solvents such as glycerol, phenol, etc.
, and insoluble in general organic solvents
such as methanol, gasoline and so on.

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