Precise Curing Analysis of Highly Accelerated Unsaturated Polyester Reactions
This paper presents a method for monitoring highly accelerated curing reactions. The method consists of using a reaction chamber where a thin sample is placed inside and its heating rate is controlled by a system that reacts to direct changes in sample temperature. Simultaneously, a Raman spectroscopy system is used to monitor the cure by shooting the laser through a lens over the reactor. The method is compared to differential scanning calorimetry. It was found that due to the high reaction rates of the pultrusion grade unsaturated polyester resin used, overheating effects were uncontrollable by DSC. It is shown that with an adequate sample thickness and with a temperature control system that reacts directly to changes in sample temperature, overheating effects can be minimized and eliminated leading to very consistent linear heating rates.
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The Journal of Plastics Technology is a peer reviewed internet periodical published under the auspices of the Scientific Alliance of Polymer Technology (WAK)
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