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Thermodynamics of processing synthetic fibers
Author(s) -
Mukhopadhyay S. K.
Publication year - 1994
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.760340419
Subject(s) - materials science , non equilibrium thermodynamics , thermodynamics , twist , amplitude , modulus , nonlinear system , mechanics , composite material , physics , mathematics , optics , geometry , quantum mechanics
This paper deals with a new approach to nonlinear and nonequilibrium thermodynamics. The new concept, developed by P. H. Lindenmeyer, states that in a heat‐setting process, with the same average processing temperature, the addition of a sinusoidal fluctuation (approximately) can produce two opposite changes depending upon the frequency and amplitude of the temperature fluctuation. Preliminary experimental results obtained on nylon 6 monofilaments using a flexible thermomechanical analyzer have clearly shown that the physical properties (in this case torque‐twist modulus) depend not only upon the average temperature but also upon its time rate of change.