ISSN:
0032-3888
Keywords:
Chemistry
;
Chemical Engineering
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
The problems of unsteady-state heat transfer associated with the melting and cooling of crystalline plastics such as polyacetals, high density polyethylene and polypropylene, are complex because of the latent heat of fusion that must be dealt with in problems where the temperature range being considered extends across the melting range. In the case of polyacetals, the use of a computer is shown in the literature to provide solutions to those problems. For many molding shops, such aids are not available. Numerical methods for the solution of such problems have been investigated, and their results are compared with those obtained using a computer and published for polyacetals. Cooling curves derived from numerical calculations, for slabs and rods made from high density polyethylene and polypropylene, are presented. Applications of the method are indicated.
Additional Material:
8 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pen.760030406
