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Advanced Composites Group Ltd. (ACG), part of the Composites Division of Umeco plc, has continued the development of HTM 143, which has been specified for use on many satellite projects.
HTM143, a low moisture pick-up resin matrix, has a 0.55% weight gain on neat resin, which according to ACG exhibits one of the lowest moisture pick-up rates of all cyanate ester systems currently on the market.
ACG say that when measured on typical high modulus carbon laminate, the outgassing characteristics of HTM143 meet the limits required by NASA: Total Mass Loss (TML) of 0.112%, Recovered Mass Loss (RML) of 0.023% and Collected Volatile Condensable Material (CVCM) of 0.002 % [ECSS-Q-ST-70-02C].
First launched in June 2009, HTM143, which is a non-ITAR listed resin system, is said to generate a very high glass transition temperature (Tg) after post-cure and is used to manufacture high accuracy, dimensionally stable space structures.
During recent tests carried out by ACG, MTM 44-1, one of ACG’s new generation of Out-of-Autoclave (OoA) processing high performance, toughened epoxy resin matrices, also met the rigorous requirements set for space applications.
MTM44-1, which researchers say can generate a glass transition temperature (Tg) of a 180°C (356°F) after a suitable post-cure, offers a Total Mass Loss (TML) of 0.307%, Recovered Mass Loss (RML) of 0.056% and Collected Volatile Condensable Material (CVCM) of 0.002 % [ECSS-Q-ST-70-02C].
Both resin systems have an out life of 21 days and are available for use with a wide range of unidirectional, biaxial and woven carbon fibre materials.
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