Improved Specifications for Composite Propellant Binders for Army Weapon Systems

A process has been developed that simultaneously can determine the molecular weight, molecular weight distribution, functionality, and functionality distribution of hydroxy-terminated polymers. The samples are analyzed on a high performance GPC permeation column and the detector responses sent directly to a computer. The molecular weight and molecular weight distribution are calculated using the universal calibration procedure. By reacting the polymer with a UV chromotograph, 3,5 dinitrobenzoyl chloride, the hydroxyl groups can be detected. By ratioing the UV response and the refractive index response, the hydroxyl groups per molecule can be determined. Detailed procedures for calibration derivitization and analysis are provided. A computer program for data reduction written in Basic for a Hewlett-Packard Lab Automation System is also provided. This project has been accomplished as part of the US Army Materials Testing Technology Program, which has for its objective the timely establishment of testing techniques, procedures, or prototype equipment (in mechanical, chemical or nondestructive testing) to insure efficient inspection methods for materiel/material procured or maintained by DARCOM. (Author)