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TBA studies of prepreg curing behavior
Author(s) -
Schneider N. S.,
Gillham J. K.
Publication year - 1980
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.750010209
Subject(s) - materials science , composite material , torsion pendulum clock , braid , vitrification , isothermal process , curing (chemistry) , aramid , epoxy , glass transition , polymer , fiber , thermodynamics , quantum mechanics , andrology , medicine , physics
The torsional braid analysis (TBA) equipment has been used as an automated torsion pendulum to characterize prepreg materials in the form of single ply strips (2‐1/2 × 1/8 in.). Compared to the use of coated glass braids, the main difference was a marked weakening of the gelation mechanical damping peak in isothermal runs. However, prepreg materials consisting of epoxy resins on glass, carbon or aramid fibers were successfully run isothermally to provide gelation and vitrification times as a function of temperature, or in constant heating rate scans to reveal the T < T g and the T g relaxations of the uncured resins, and at higher temperatures phenomena associated with gelation, vitrification and devitrification.