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Polyvinyl Acetate: Vinyl Acetate Set Solid by Sunlight
Klatte and Rollett (Griesheim-Elektron, patent 1917) found that vinyl acetate left in sunlight, or under a mercury vapour lamp, turns into a clear, colourless solid like celluloid. It can be cut and turned, softened in hot water and moulded, and dissolved in ethyl acetate as a lacquer. It is the polymer behind PVA glue.
The picture: our diagram, liquid to solid in the light.
中级
Days in the sun
说明
1
1
Fill a clear vessel
Fill a clear vessel
Pour vinyl acetate into a clear glass jar and close it (our vessel). Its vapour ignites easily: no flames near it.
此步骤所需材料：
醋酸乙烯单体500 克所需工具：
带盖玻璃罐
数字厨房秤
耐化学品手套
化学防溅护目镜2
2
Set it in the light
Set it in the light
Stand the jar in direct sunlight, or under a mercury vapour lamp. Stronger light and warmth make it set faster; it first turns syrupy, then solid.
所需工具：
带盖玻璃罐3
3
Take out the solid
Take out the solid
The product is clear, colourless and odourless. Cut or turn it, or soften it in hot water and mould it; it hardens again as it cools.
所需工具：
手工刀
双层隔水锅耐化学品手套4
4
Monomer in, polymer out
Monomer in, polymer out
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