ISSN:
0021-8995
Keywords:
Chemistry
;
Polymer and Materials Science
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:
Higher and higher temperatures for vulcanization and storage bulb are being used in order to reduce the time of cure cycle in processes of rubber injection molding. The purpose of this work was to show that the temperature gradients as well as the profiles of the state of cure developed in the rubber mass could be predicted by using the kinetics of reaction, the physical properties of the rubber, and a convenient model. Although vulcanization is a complex series of reactions, the overall result by considering the heat of reaction could be described by a single first-order reaction. The calculation was solved applying an explicit method with finite differences, by taking into account the internal generation of heat due to the cure reaction and the heat transfer by conduction with a temperature dependence of the physical properties of the rubber. The effect of the values of the temperature of the mold and storage bulb on the profiles of temperature and state of cure developed within rubber was studied by considering rubber sheets of different thicknesses.
Additional Material:
8 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/app.1984.070290323
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