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> Bismaleimide resin.
can be solutions or hot-melt resins. These and related materials
such as acetylene terminated polyimide have high temperature
resistance. Some of the matrix materials can be used up to
above 300°C. When used with carbon
fibres they are considered to be advanced composites because
of these properties, and because they have superior performance
to epoxies in hot/wet conditions,
but there are accompanying disadvantages. They are normally
very brittle and prone to microcracking, although, as with
epoxies, this tendency can be reduced by the incorporation
of a thermoplastic component.