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Torsion impregnated cloth analysis (TICA): A forced torsion technique to study resins supported by inert substrate
Author(s) -
Lee C. YC.,
Goldfarb I. J.
Publication year - 1981
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.760210705
Subject(s) - materials science , thermosetting polymer , composite material , glass transition , isothermal process , torsion (gastropod) , curing (chemistry) , thermoplastic , vitrification , glass fiber , inert , composite number , polymer , thermodynamics , organic chemistry , physics , medicine , chemistry , surgery , andrology
Torsion Impregnated Cloth Analysis (TICA) uses fiber glass cloth as support for polymeric resins and measures the clothresin composite's in‐phase and out‐of‐phase dynamic mechanical responses with a Rheometrics mechanical spectrometer. The TICA thermoscan results of a thermoplastic were compared with that of the neat material. A similar comparison was made between the isothermal curing results of a thermosetting resin and the corresponding parallel plate and TBA measurements. The peaks associated with the vitrification were verified to correspond to those in the glass transition region. Conventional thermoscans of partially cured specimens with known T g were shown under certain conditions to give erroneous results about the glass transition temperatures. A reduced parameter ( T ‐ T g ) was introduced to describe the response of a specimen undergoing additional cure while being subjected to a thermoscan. Examples using this parameter to understand seemingly complex experimental results are given.