Study And Preparation Of P (U-MMA-ANI) Interpenetrating Networks Damping And Absorbering Material

With the development of the technology such as the modern communication and transportatiion, aviation, aviation, et.al, the mechanical environment of the vehicles, machinery, ships, jet aircraft and rockets, satellites because of the vibration, shock, overload, noise and others are more complex and severe. In addition, with the deteriorating of electromagnetic environment and electromagnetic radiation and the rapid development of military technology, the requirement of the high-performance electromagnetism protection material to civilian and national defense is growing highly and the harm of eldctromagnetic radiation has been highly valued.This paper puts forward P(U-MMA-ANI) IPN damping absorbing material is obtained by PANI particles served as absorbing agent with microemulsion polymerization, and with PU/PMMA foam IPN network structure for substrate materials with foaming way. And their characterizations are made by the FT-IR, TG, DSC, TEM and XRD. The doped PANI partical size of 50 nm is synthesized by choosing various microemulsion systems and reaction conditions. Experiment result verifies PU/PMMA IPN foam damping material has a good compressive strength and compaction cycle property and the optimum content of PMMA was 30 %(mass)with which the SEM graphs do not present the phase separation on the macro level between PMMA and PU but the phase separation on the micro level. The DTG curve indicates that because of the formation of PU/PMMA IPN, the decomposition temperature of PMMA and the carbamate in PU increases, while that of the polyol segment in PU has almost no change. P (U-MMA-ANI) IPN foam damping absorbing material is obtained by PANI particles served as absorbing agent in the form of filler, and PMMA in the form of micro area in substrate material; Experiment result verifies PANI particles effectively increase compressive strength and compaction cycle property of P (U-MMA-ANI) IPN damping absorbing material; When the content of PANI was up to 1.0 %(mass), the dissipation factor of composite increased, and with the increasing of frequency the dissipation factor increased in a straight line.