Regulation of the process of cure of thermosets by varying the coefficient of surface heat transfer

✍ Scribed by K. Azaar; A. El Brouzi; R. Granger; J.M. Vergnaud

• Publisher: Elsevier Science
• Year: 1992
• Tongue: English
• Weight: 463 KB
• Volume: 28
• Category: Article
• ISSN: 0014-3057
• DOI: 10.1016/0014-3057(92)90033-x

✦ Synopsis

Because of the high exothermicity of the cure reaction of thermosets associated with their low thermal conductivity, large increases in temperature within the material are observed with steep gradients of temperature. In order to reduce the increase in temperature and steep gradients, a new procedure is examined, by varying the coefficient of heat transfer on the surface of the mould and the resin. This change in this coefficient is obtained by varying the rate of stirring of the oil which heats the mould, and by keeping the oil temperature constant. This method is capable of reducing the increase in temperature within the resin, without increasing the time of cure significantly.