SEARCH Articles Figures Tables Annihilate Annihilation Annihilation lifetime Free lifetime Free polymer Free volume High free volume polymers Lifetime free positron Lifetime spectroscopy Polymer volume Positron Positron annihilation Positron annihilation lifetime Positron annihilation lifetime spectroscopy Positron annihilation lifetime spectroscopy volume Positron lifetime spectroscopy Positron lifetimes Positron spectroscopy Spectroscopy polymers Spectroscopy, positron annihilation