A kind of preparation method of toughened high temperature resistant polyester material poly-1.4 cyclohexane dimethanol terephthalate

Abstract

The invention discloses a preparation method of a toughened high temperature tolerant polyester material namely poly(1,4-cyclohexylenedimethylene) terephthalate. The preparation method comprises the following steps: weighing refined terephthalic acid and 1,4-cyclohexanedimethanol according to a mole ratio of 1:1-2, taking the weighed components as the polymerization reaction monomers, feeding the weighed components into a polymerization reactor, evenly stirring, gradually adding a reaction catalyst into the polymerization reactor within 10 to 25 minutes by a metering pump propeller, adding a phosphate stabilizing agent into the reaction system, evenly stirring and mixing, and adding aluminum nitride in the mid-late period of pre-polymerization; wherein aluminum nitride will be decomposed under a high temperature condition, then nitrogen free radicals with a high reactive activity will be released, thus the branching reactions and hyperbranching reactions in the polymerization system can be realized, the polymer toughness is also improved, and at the same time the heatproof and heat conductive performance of the polymer system are both improved by the addition of aluminum nitride.

Description

technical field [0001] The invention relates to the technical field of polymer material production, in particular to a preparation method of poly-1.4-cyclohexanedimethylene terephthalate, a toughened high-temperature-resistant polyester material. Background technique [0002] High-toughness and high-temperature-resistant materials have always been the research hotspots in the field of polymer materials. With the development and progress of science and technology, higher requirements have been placed on materials for industrial and special purposes. Traditional polymer materials have been difficult in terms of performance and function. To meet the needs of the industry, a lot of research has been done in the field of polymer materials in China. For example, polymer materials with photoelectric effect and luminescent polymer materials have been produced correspondingly and have achieved good applications. However, such materials are not based on high polymer materials. The imp...

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Problems solved by technology

[0002] High-toughness and high-temperature-resistant materials have always been the research hotspots in the field of polymer materials. With the development and progress of science and technology, higher requirements have been placed on materials for industrial and special purposes. Traditional polymer materials have been difficult in terms of performance and function. To meet the needs of the industry, a lot of research has been done in the field of polymer materials in China. For example, polymer materials with photoelectric effect and luminescent polymer materials have been produced correspondingly and have achieved good applications. However, such materials are not based on high polymer materials. The improvement of the matrix of molecular materials is only achieved by adding some functional substances to the polymer material as the matrix and skeleton. A matrix material with good performance and good interface effects with functional powders is urgently needed to be developed.

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