Accession Number : ADP004981

Title :   Molecular Size Distribution of Nitrocellulose in XLDB Lacquer Using GPC/FT-IR (Gel Permeation Chromatography/Fourier Transform-Infrared Spectrophotometer),

Corporate Author : MORTON THIOKOL INC BRIGHAM CITY UT WASATCH DIV

Personal Author(s) : Raisor,R. C. ; Law,R. D.

Report Date : JAN 1985

Pagination or Media Count : 5

Abstract : Gel Permeation Chromatography (GPC) has become the standard technique for determining molecular size and weight distribution of soluble polymeric materials. However, when GPC is applied to mixtures containing different types of macromolecules it is difficult, if not impossible, to resolve them using conventional GPC detectors. This is true in the case of PGA/nitrocellulose mixtures. Use of a Fourier Transform Infrared Spectrophotometer (FT-IR) as a detector for the GPC offers an approach that should enable resolution of different species by following the infrared absorption of their distinguishing functional groups. GPC/FT-IR has been used to measure the molecular size distribution of nitrocellulose (and to a less extent, PGA) in XLDB propellant lacquers. The technique has been used to look at changes in nitrocellulose during accelerated aging of lacquer mixtures.

Descriptors :   *NITROCELLULOSE, *DOUBLE BASE PROPELLANTS, *MOLECULAR PROPERTIES, *GEL PERMEATION CHROMATOGRAPHY, *INFRARED SPECTROPHOTOMETERS, FOURIER SPECTROSCOPY, INFRARED SPECTROSCOPY, MOLECULES, SIZES(DIMENSIONS), DISTRIBUTION, LACQUERS, AGING(MATERIALS), SYMPOSIA

Distribution Statement : APPROVED FOR PUBLIC RELEASE