Prepolymer Characterization

摘要

Some fundamental aspects of the physicochemical characterization of propellant prepolymers were explored for the purpose of developing and optimizing analytical procedures for molecular weight, degree of branching, and functionality distributions. fractional solution fractionation, vapor phase osmometry, gas, and high-performance column liquid chromatography, and mass spectrometry were employed with model polystyrene polymers as well as bulk and fractionated R-45M and HMDS-treated R-45M. The methodologies and techniques of analysis ultimately developed make use only of readily available equipment, are applicable to characterization and routine quality control of virtually any prepolymer system, and can be implemented in any vendor or governmental laboratory. Hydroxy terminated polybutadiene, R 45M, Prepolymer characterization, chromatography, Mass spectrometry, Infrared spectroscopy, Viscosity, Density, Vapor phase osmometry. (mjm)