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Engineering Materials Technology, 2nd Edition
book

Engineering Materials Technology, 2nd Edition

by William Bolton
October 2013
Intermediate to advanced content levelIntermediate to advanced
468 pages
20h 15m
English
Newnes
Content preview from Engineering Materials Technology, 2nd Edition
74 Engineering Materials
Technology
Crystallinity
(%)
95
60
60
0
0
Melting
point
(°C)
138
115
176
212*
_
When an amorphous polymer is heated it shows no definite melting
temperature but progressively becomes less rigid. The molecular arrangement
in an amorphous material is all disorderly, just like that which occurs in a
liquid. It is for this reason, i.e. no structural change occurring, that no sharp
melting point occurs. For crystalline polymers there is an abrupt change at a
particular temperature. Thus if the density of the polymer were being
measured as a function of temperature, an abrupt change in density would be
seen at a particula ...
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Publisher Resources

ISBN: 9781483141077