TY - RPRT TI - Nuclear Instruments and Methods in Physics Research: Microstructural Characterization of Semi-Interpenetrating Polymer Networks by Positron Lifetime Spectroscopy - Section B AU - Singh, Jag J. AU - Pater, Ruth H. AU - Eftekhari, Abe PY - 1998 UR - https://ntrs.nasa.gov/citations/19980200986 ID - 19980200986 ER -