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ÀWỌN OHUN WÍWỌ̀
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.
Àárín
Days in the sun
Ìlànà
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.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Monomer vinyl acetate500 gÀwọn irinṣẹ́ tí a nílò:
Ìgò Gílásì Onídìí
Òṣùwọ̀n Díjítà Ilé Ìdáná
Ìbọ̀wọ́ Tí Ń Kojú Kẹ́míkà
Gílásì Ààbò Fún Ìfọ́n Kẹ́míkà2
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.
Àwọn irinṣẹ́ tí a nílò:
Ìgò Gílásì Onídìí3
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.
Àwọn irinṣẹ́ tí a nílò:
Ọ̀bẹ Iṣẹ́ Ọwọ́
Ìkòkò méjì onímí omiÌbọ̀wọ́ Tí Ń Kojú Kẹ́míkà4
4
Monomer in, polymer out
Monomer in, polymer out
Ń ṣí ìwé Jupyter…
Àwọn ohun-èlò
1- Àyè
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