How can I prepare floral foam using phenol formaldehyde resin in lab?

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How can I prepare floral foam using phenol formaldehyde resin in lab?

it is a foam, solid in nature has the tendency to hold water and to stick the plants in it.

2006-12-07 17:40:12 · 2 answers · asked by abkar N 1 in Science & Mathematics ➔ Botany

2 answers

UREA-FORMALDEHYDE RESIN

Needs

* Urea (about 5g)
* Formalin (about 10ml)
* Test tube
* Concentrated sulfuric acid
* 2L beaker or fume cupboard.

Method

* Stir 5g of urea with 10ml of formalin until a saturated solution is formed.
* Add 1 - 2 drops of concentrated sulfuric acid. Cover with large beaker or do in fume cupboard (formalin gives of acrid fumes)

Results

* The mixture suddenly hardens to form a cross-linked, thermostat plastic.

2006-12-11 13:59:17 · answer #1 · answered by john h 7 · 0⤊ 0⤋

I don't know

2006-12-11 12:46:19 · answer #2 · answered by RaquelSolo 4 · 0⤊ 1⤋