The main properties and uses of thermoplastics commonly used in engineering
are outlined below and in Tables 15.1 and 15.2. For more information about
thermoplastics and their use the reader is referred to The Selection and Use of
Thermoplastics
by P. C. Powell (Oxford University Press).
Polyethylene
Polyethylene (PE), is referred to as high density (HDPE) when the molecular
chain is linear and as low density (LDPE) when the molecular chain has
branches and so the molecules cannot be so tightly packed and a less crystalline
structure is feasible. LDPE has a density of about 918 to 935 kg/m
3
and HDPE
about 93 ...
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