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Heat transfer and cure in pultrusion: Model and experimental verification
Author(s) -
Batch Gibson L.,
Macosko Christopher W.
Publication year - 1993
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690390713
Subject(s) - pultrusion , heat transfer , materials science , nuclear engineering , process engineering , mechanical engineering , environmental science , mechanics , engineering , composite material , physics , fibre reinforced plastic
Though pultrusion has existed for nearly 40 years, factors affecting temperature and resin reactivity are not completely understood. A model is tested to help explain the effects of die temperature, line speed and initiator concentration on curing inside a pultrusion die. The model includes radio frequency preheating, heat conduction, heat of cure, changing thermal properties with temperature and degree of cure, and hindered heat transfer due to shrinkage of the profile away from the die. The analysis is compared to experimental temperature measurements for a 1‐in. (25‐mm) round die, where die temperature, line speed, and initiator concentration were varied. Temperature predictions by the model are in good agreement with the data for many of the conditions tested. Considerable disagreement still persists, however, under processing conditions with faster line speeds and lower die temperatures.