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Monitoring the cure processing properties of unsaturated polyesters in situ during fabrication
Author(s) -
Kranbuehl D. E.,
Averty P. H.,
Hoff M.,
Hoffman R. D.
Publication year - 1989
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760291504
Subject(s) - materials science , in situ , fabrication , electrical impedance , polyester , modulus , composite material , dipole , ionic bonding , analytical chemistry (journal) , chromatography , organic chemistry , chemistry , ion , pathology , electrical engineering , engineering , medicine , alternative medicine
The use of frequency dependent impedance measurements in the Hz to MHz range for continuous in situ measurements of the processing properties of unsaturated polyester resins both in a laboratory and manufacturing tool is presented. The frequency dependence of the complex impedance is used to separate and measure ionic and dipolar mobility. These two parameters are used as molecular probes to monitor in‐situ the reaction onset, point of maximum flow, gel, post gel buildup in modulus, and the final degree of hardness.