Preparation of Poly vinylbutyral

Safety precautions Before this experiment is carried out. Sect. 2.2.5 must be read as well as the material safety data sheets (MSOS) for all chemicals and products used. 

A small amount of a Polyfvinyl butyral) solution is spread on a glass plate and evaporated slowly to create a thin film.Then the breaking behavior of the laminated glass plate is determined. Polyfvinyl butyral) foils are used for the manufacture of safety glass, for example, windshields in cars. 

Example 5.3 Hydrolysis of a Copolymer of Styrene and Maleic Anhydride 

2 g of an alternating copolymer of styrene and maleic anhydride (see Example 3.38) are heated to boiling with 50 ml of 2 M sodium hydroxide solution in a 100 ml round-bottomed flask fitted with a reflux condenser. The polymer dissolves within a few minutes. After 1 h the solution is cooled and the polymeric acid precipitated 

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