Accession Number : ADA298103

Title :   Fiber Optic Raman Measurements of Bonding Agents and Interfaces during the Curing Process.

Descriptive Note : Final rept. for 1992-1994,

Corporate Author : SOUTH CAROLINA UNIV COLUMBIA DEPT OF CHEMISTRY

Personal Author(s) : Myrick, Michael L. ; Morgan, Stephen L.

PDF Url : ADA298103

Report Date : 03 JAN 1995

Pagination or Media Count : 34

Abstract : This project was aimed at understanding the curing of polymers using in situ fiber-optic Raman spectroscopy. In particular, the project emphasized curing at primarily glass interfaces, using chemometric analysis of Raman data obtained during curing. We have performed the first Raman study of the curing of a Polyimide using FT-Raman spectroscopy that employed statistical data determination and a comparison with DSC to demonstrate the ability of optical spectroscopic data to quantitatively determine the extent of curing. We have conducted in situ fiber-optic FT-Raman measurements of bulk polyimide polymers. Results from statistical analyses have been used to determine percent curing and stoichiometry in the polymers. Internal heat generation, transport and the effects of internal heat generation on reaction rates have been studied using fiber-optic methods. An in situ probe for fiber-optic Raman spectroscopy has been developed which is approximately the same size as a thermocouple, is inexpensive, easy to use and gives both temperature and cure information, with the percentage cure measurement having a standard error of 0.5% over the entire range of polymer curing. A polymer suspension of metal particles has been developed which is surface-enhanced Raman active, permitting the first optical study of the metal-polymer interface which has first-monolayer sensitivity in a bulk material. jg p.2

Descriptors :   *FIBER OPTICS, *INTERFACES, *POLYMERS, *BONDING, *CURING, *RAMAN SPECTRA, FOURIER TRANSFORMATION, METALS, MEASUREMENT, OPTICAL PROPERTIES, PRODUCTION, RAMAN SPECTROSCOPY, REACTION TIME, STATISTICAL DATA, RATES, OPTICAL DATA, GLASS, BULK MATERIALS, PARTICLES, INTERNAL, STATISTICAL ANALYSIS, SUSPENSION DEVICES, HEAT, THERMOCOUPLES, STOICHIOMETRY, POLYIMIDE RESINS.

Subject Categories : Polymer Chemistry
      Plastics
      Atomic and Molecular Physics and Spectroscopy
      Fiber Optics and Integrated Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE