IX. THERMAL EXPANSIVITY OF SOLIDS
IX. THERMAL EXPANSIVITY OF SOLIDS
IX. THERMAL EXPANSIVITY OF SOLIDS
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<strong>THERMAL</strong> EXPANSION <strong>OF</strong> POLYTHENE<br />
Sources of Data: Laquer and Head 1952. (In addition to<br />
the substances listed in the table, data<br />
have been given for 16 specially compounded<br />
rubbers by Bunsmoor et al. 1958 and Trepus<br />
et al. 1959. These data consist.mainly of<br />
values of (L -L<br />
293 78<br />
Other Re ference s : WOQ~, Bekkedahl and Peters 1939.<br />
Discussion: Polyethylene made by E.I. Du Pont de Nemours<br />
and Co.. Molded under 2000 psi pressure at<br />
l5OoC for 10 min. Directional variations<br />
were negligible. See also Hunter and Oakes<br />
1945. Five filled polythenes were measured<br />
by Head and Laqyer 1952.<br />
remp .<br />
0<br />
K<br />
0<br />
20<br />
40<br />
60<br />
80<br />
too<br />
L20<br />
L40<br />
160<br />
-80<br />
Table of Selected Values<br />
L293 - LT<br />
L293<br />
2449 x 10-5<br />
2439 I1<br />
2404 I1<br />
2349 I1<br />
2279 I1<br />
2194 11<br />
2089 I1<br />
1964 I1<br />
1814 I1<br />
1639 I1<br />
Taken from NBS 29<br />
Temp.<br />
0<br />
IC<br />
200<br />
220<br />
240<br />
2 60<br />
293<br />
2%0<br />
293<br />
298<br />
300<br />
<strong>IX</strong>-R- 7.1<br />
- L<br />
L293 T<br />
L293<br />
1439 10-5<br />
1199<br />
919 'I<br />
594<br />
359 'I<br />
239<br />
0<br />
-131