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Цианат-эфирные связующие в аэрокосмической отрасли. Каталитические свойства органометаллических комплексов и солей диазония с комплексными анионами в отверждении цианат-эфирных связующих

Цианат-эфирные связующие в аэрокосмической отрасли. Каталитические свойства органометаллических комплексов и солей диазония с комплексными анионами в отверждении цианат-эфирных связующих

Abstract

Cyanate ester resin (CER) is the novel and prospective material. Thermal stability, low gas and moisture absorption, high dielectric properties, low outgassing, good resistance to radiation and radio transparency with dimensional stability are the key CER properties that make it the best candidate for the use in space apparatus manufacturing. During the impregnation process of high modulus carbon fibers by cyanate ester prepolymer at Prepreg Line-Type PLS-250-2F (Mikrosam, Makedonia) a premature reaction of polymerization on the heated metal rollers in the resin transfer sector of machine was observed. In this regard the catalytic effects of organometallic complexes containing ions of transition metals on kinetics of CER polymerization by using DMA and viscosimetric methods were studied. It is shown that a usage of stainless steel rollers results in a significant reduction of a lifetime of melt prepolymer. By the results of this research it is recommended to use the ceramic rollers instead, for example made from boron nitride. As a new type of catalyst for curing reaction of cyanate ester prepolymer, with the possibility of incorporation into the polymer network, diazonium compounds were first investigated. The obtained results include a new class of catalysts for curing of cyanate ester prepolymer into the category of a prospective type.

Цианат-эфирный пластик (ЦЭП) является современным и перспективным материалом. Термостойкость, низкая газои влагопоглощаемость, высокие диэлектрические свойства, низкое газовыделение, хорошая сопротивляемость к ионизирующему излучению и радиопрозрачность с учетом размеростабильных свойств делает ЦЭП лучшим кандидатом для применения в космическом аппаратостроении и спутникостроении. Во время экспериментов c импрегнированием цианат-эфирным преполимером высокомодульных углеволокон на пропиточной машине PLS-250-2F (Mikrosam, Македония) было выявлено преждевременное отверждение преполимера на нагреваемых металлических валах узла наноса. В связи с этим было исследовано влияние комплексов, содержащих ионы переходных металлов на кинетику полимеризации ЦЭП методами ДМА и вискозиметрии. Показано, что использование стальных валов пропиточной машины приводит к существенному снижению жизнестойкости расплава преполимера. На основании полученных данных рекомендуется использовать керамические поливочные валы, изготовленные, например, на основе нитрида бора. В качестве нового типа катализатора реакции полимеризации для получения ЦЭП с возможностью встраивания в полимерную сетку были впервые исследованы комплексные соли диазосоединений. Полученные данные позволяют отнести новый класс катализаторов реакции отверждения цианат-эфиров в разряд перспективных.

Keywords

СYANATE ESTER RESINS, ЦИАНАТ-ЭФИРНЫЕ СВЯЗУЮЩИЕ, ПЛАСТИКИ, КОМПОЗИТ, ПРЕПРЕГ, ЭПОКСИДЫ, СМОЛЫ, ВЛАГОПОГЛОЩАЕМОСТЬ, ТЕРМОСТОЙКОСТЬ, РАДИОПРОЗРАЧНОСТЬ, АЭРОКОСМИЧЕСКАЯ ОТРАСЛЬ, КОСМИЧЕСКИЕ АППАРАТЫ, РЕФЛЕКТОР, КАТАЛИЗАТОР, ИОНЫ МЕТАЛЛОВ, СОЛИ ДИАЗОНИЯ

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
0
Average
Average
Average