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glass transition temperature |
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glass transition temperature [¦glas ‚tran′zish·ən ‚tem·prə·chər] (physical chemistry) The temperature at which a liquid changes to an amorphous or glassy solid. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| Key statement: The rubber particles, at a room temperature below the glass transition temperature, are introduced into a comminuting device concurrent with the introduction of an inert gas coolant at a temperature below about -75[degrees]F and are comminuted at a rate proportional to the average particle size of the introduced rubber particles to an average size within the range of crumb or powder rubber particles. Glass does not have a precise freezing point; rather, it has what's known as a glass transition temperature, typically a few hundred degrees Celsius. This was studied because blowing agent concentration is believed to have the most pronounced effect due to its lowering of the glass transition temperature of the polymer. |
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