Polymer00024 - q / T p 2 ) versus E a/ RT p should be...

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13 in fluoroelastomers (Moore 2005). Structures of the effective radical traps TAIC,are shown in Figure 1.5. Generally, there are many ways to calculate curing kinetics of rubber crosslinking process, such as Horie model (Cole 1991).The widespread method is using the activation energy of the cure reaction determined by both Kissinger’s and Ozawa’s methods (Wang and Lin 2000) for accuracy of results . Based on Kissinger’s theory, the activation energy can be obtained from the peak temperatures at different heating rates (Liu, et al. 2009). The equation is expressed as: where q is the heating rate, T p is the exothermic peak temperature, E a is the activation energy, R is the gas constant and A is the pre-exponential factor. A plot of -ln(
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Unformatted text preview: q / T p 2 ) versus E a/ RT p should be linear and the apparent activation energy can be obtained from the slope of the straight line. 1.5 Dynamic Vulcanization and Thermo Haake Rheometer As mentioned above, elastomer/thermoplastic blends have become technologically and commercially viable as thermoplastic elastomers in recent years. They have many properties of elastomers, yet they are processable like thermoplastic. They do not need to be vulcanized during fabrication into end-use parts. Thus, they offer a substantial economics, design, and processing advantage regarding the fabrication of the finished parts. For many end uses, the ideal elastomer/plastic blend comprises finely divided -ln(q/ T p 2 ) =E a / RT p-ln(AR/E a )...
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This note was uploaded on 08/18/2011 for the course MATSE 447 taught by Professor Colby,r during the Spring '08 term at Pennsylvania State University, University Park.

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