Download - THERMOSETTING PLASTICS
PLASTICS3:PLASTICS3:THERMOSETTTHERMOSETT
ING ING PLASTICS.PLASTICS.
Alba Ferrer Sánchez.3º ESO C.
What are What are thermosetting thermosetting
plastics?plastics?Once heated and moulded, these plastics cannot be
reheated and remoulded. The molecules of these plastics are cross linked in three dimensions and this is why they cannot be reshaped or recycled. The bond between the
molecules is very strong.
Epoxy.Epoxy.Water and heat resistant.
Polyurethane.Polyurethane.Tough and water resistant.
Melamine Melamine Formaldehyde. Formaldehyde.
Smooth surface and hygienic qualities.
Urea Urea Formaldehyde. Formaldehyde.
Schratch resistant and a very good electrical insulator.
Polyester Polyester resins.resins.
Lightness and toughness.
The difference The difference between between
thermosetting thermosetting plastics and plastics and
thermoplastics:thermoplastics: Thermosetting plastics once heated and
formed to a shape,cannot be reheated and reformed. Consequently, they tend to be difficult
to recycle. Thermoplastics once heated and formed to a
shape, can be reheated and reshaped. Every time they are reshaped, the quality of the
thermoplastic tends to be reduced.They are recyclable.
Website’s links.Website’s links.http://upload.wikimedia.org/wikipedia/commons/7/79/Super_glue.jpg
http://pixabay.com/p-157810/?no_redirect
http://farm5.staticflickr.com/4060/4514230886_d79ab86bc4_o.jpg
http://upload.wikimedia.org/wikipedia/commons/5/51/Thai_TIS_166-2549_mains_plug.jpg
http://fc06.deviantart.net/fs42/i/2009/090/c/0/Sailing_boat_by_panthera_lee.jpg