Digitale Medien
Stamford, Conn. [u.a.]
:
Wiley-Blackwell
Polymer Engineering and Science
27 (1987), S. 1399-1402
ISSN:
0032-3888
Schlagwort(e):
Chemistry
;
Chemical Engineering
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
,
Maschinenbau
,
Physik
Notizen:
A certain fraction of the mechanical work performed on a specimen is converted into heat during necking of plastic material. A method for measuring this fraction is proposed when specimens are drawn in two different surroundings, air and water. Differences in the heat transfer coefficients of these two media influence the temperature rise during necking. The fraction (α) of mechanical work converted into heat can be calculated using data determined at only one draw rate. The value of α calculated for polypropylene is 0.55 and for polyethylene it is 0.48.
Zusätzliches Material:
1 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/pen.760271808
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