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Title: Remote cure monitoring of polymeric resins by laser Raman spectroscopy

The validity of using Raman spectroscopy to monitor the cure chemistries of amine-cured epoxy is demonstrated by correlating NIR absorbance measurements with Raman measurements for a concentration series of bisphenol-A diglycidylether in its own reaction product with diethylamine. The intensity of a normalized Raman peak at 1240 cm{sup {minus}l}, assigned to the epoxide functionality, was found to be linearly related to the concentration of epoxide groups in the resin mixtures. Also, it is shown that the Ciba-Geigy Matrimid 5292 system can be monitored by ex-situ FT-Raman spectroscopy by observing changes in the carbonyl stretching (1773 cm{sup {minus}1}) or the C=C stretching of maleimide (1587 cm{sup {minus}1}) during the cure reaction.
Authors:
;  [1] ;  [2] ;  [3]
  1. Lawrence Livermore National Lab., CA (United States)
  2. Federal Aviation Administration, Atlantic City, NJ (United States). Technical Center
  3. South Carolina Univ., Columbia, SC (United States). Dept. of Chemistry
Publication Date:
OSTI Identifier:
10171667
Report Number(s):
UCRL-JC--112824; CONF-9305232--1
ON: DE93016445
DOE Contract Number:
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: 38. International Society for the Advancement of Material and Process Engineering (SAMPE) symposium and exhibition,Anaheim, CA (United States),10-13 May 1993; Other Information: PBD: May 1993
Research Org:
Lawrence Livermore National Lab., CA (United States)
Sponsoring Org:
USDOE, Washington, DC (United States)
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION; 36 MATERIALS SCIENCE; CURING; MONITORING; RESINS; COMPOSITE MATERIALS; RAMAN SPECTROSCOPY; TEMPERATURE MEASUREMENT; LAWRENCE LIVERMORE LABORATORY; CHEMICAL ANALYSIS 440600; 360603; OPTICAL INSTRUMENTATION; MECHANICAL PROPERTIES