IN SITU TESTING AND EVALUATION OF VCM FOR NATIONAL MATERIALS

A test equipment of volatile condensable materials （VCM ） in vacuum is used to test many domestic space materials.The heating temperature and the condensing temperature are betw een 25℃ and 125℃，-180℃ and 25℃ respectively.The testing continued time is from 24to 1500h.The typical data of some space materials V CM varying with time is offered.