"Microstructure." . . "Permittivity." . . . . . . . . . . . . . . . . . . . . "Microstructural characterization of semi-interpenetrating polymer networks by positron lifetime spectroscopy" . "Microstructural characterization of semi-interpenetrating polymer networks by positron lifetime spectroscopy"@en . . . . . . . . "Positrons." . . "Mechanical properties." . . . . "Polyimides." . . "Electric dipoles." . . "Thermoplasticity." . .