A method for measuring the glass transition temperature of filler-containing polymers

Abstract

The invention discloses a method for measuring the glass transition temperature of a filler-containing polymer. The glass transition temperature of a filler-containing polymer is measured by using the dynamic mechanical analysis function of a nanomechanical tester combined with a heating platform, and a smooth temperature can be obtained. Storage modulus-temperature curve, loss modulus-temperature curve, and ratio of loss modulus to storage modulus-temperature curve, and then obtain accurate glass transition temperature according to the definition of glass transition temperature. This method has good application prospects in the fields of polymer material application, glass transition temperature measurement and so on.

Description

technical field [0001] The invention relates to the technical field of glass transition temperature evaluation, in particular to a method for measuring the glass transition temperature of filler-containing polymers. Background technique [0002] Glass transition is an inherent property of amorphous polymer materials, glass transition temperature (T g ) is one of the characteristic temperatures of polymer materials, which directly affects the use performance and process performance of materials, and determines the use temperature of materials, so it has been an important content of polymer physics research for a long time. When the glass transition occurs, many physical properties, especially the mechanical properties, will change drastically, and the polymer will change from a rigid glass state to a soft rubber state. In principle, all physical properties that change abruptly or discontinuously during the glass transition, such as modulus, specific heat, thermal expansion c...

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Problems solved by technology

However, for micro-nano-scale polymer materials containing fillers, especially when the fillers are of different sizes and unevenly distributed, there are large differences in the storage modulus, loss modulus and even Tan-Delta measured at different positions of the sample. Using this method The obtained storage modulus, loss modulus and Tan-Delta curves vary greatly with temperature, and it is difficult or even impossible to obtain an accurate glass transition temperature

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