Polystyrene containing n-pentane as a foaming agent can easily increase its original volume by 20 to 50 times when heated with steam. If pre-foamed polystyrene of this type is sintered together in a closed mould to make a section with a closed cell structure, the resulting moulded polystyrene foam part exhibits high strength at low density and is therefore ideally suited for packaging material and for thermal and sound insulation boards. The experiment uses simple materials to help students understand this industrial processing technique.
| Materiallist (Excerpt) |
Product |
Amount |
|
Silicone oil 500 ml
|
31849-50
|
1
|
|
Support base variable
|
02001-00
|
1
|
|
Mold, spherical, diameter 40mm
|
35033-00
|
1
|
|
Styropor P, 250 g
|
48492-25
|
1
|
|
Bunsen burner /DIN/, nat.gas
|
32165-05
|
1
|
|
Ring with boss head, i. d. = 10 cm
|
37701-01
|
1
|
|
Support rod, stainless steel, l = 600 mm, d = 10 mm
|
02037-00
|
1
|
|
Universal clamp
|
37715-00
|
1
|
|
Boss head
|
02043-00
|
1
|
|
Safety gas tubing, DVGW, sold by metre
|
39281-10
|
1
|
|
Protecting glasses, clear glass
|
39316-00
|
1
|
|
Crucible tongs,200mm,stainl.steel
|
33600-00
|
1
|
|
Glass beaker DURAN®, short, 150 ml
|
36012-00
|
1
|
|
Spoon, special steel
|
33398-00
|
1
|
|
Wire gauze 160 mm x 160 mm, ceramic cen.
|
33287-01
|
1
|
|
Sieve, fine mesh, d=60 mm
|
40968-00
|
1
|
|
Lighter f.natural/liquified gases
|
38874-00
|
1
|
|
Flints, 3 pcs
|
38874-01
|
1
|
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