Thermomechanical experiment and analysis on shape recovery properties of shape memory polymer influenced by fiber reinforcement

摘要

A study was conducted to demonstrate thermomechanical experiment and analysis on shape recovery properties of shape memory polymer influenced by fiber reinforcement. The thermomechanical cycle tests for pure SMP and SMP reinforced with short-carbon fibers were first conducted to investigate the mechanism. Polyurethane series of thermoset SMP and Diary MP-5510 were provided by SMP Technologies Inc., to conduct the investigations. The cured polymer had a glass transition temperature of 55 °C and the temperature range of glass transition between glassy state and rubbery state was 30 °C. The fibers with approximately 5 mm length were randomly embedded in the prepolymer before curing and the weight fraction of fibers was set to 0, 2, and 4 wt%. The test fixture was set in a temperature-controlled bath and the temperature was measured with a thermocouple attached to the specimen.