A contractor realized that freezers used for the storage of multiple lots of YLA's RS3C/M50J polycyanurate prepreg used for the fabrication of space hardware had experienced a malfunction that had not been identified. The freezer had been running at approximately 10-20 degrees F above the specified requirements with some excursions as high as 60 degrees F for extended periods of time. Hydrolysis of the cyanate monomer can form carbamates and ...
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