Draw ratio dependence

Applied Spectroscopy 51, No.3, March 1997, p.346-9 AMPLITUDE SPECTRUM APPROACH IN DYNAMIC FT-IR SPECTROSCOPY OF UNIAXIALLY ORIENTED POLYETHYLENE TEREPHTHALATE FILMS. I. DRAW RATIO DEPENDENCE... 

Figure 14.5 Draw ratio dependence of the elastic stiffnesses of Vectra B. The solid and dashed curves denote, respectively, the Voigt and Reuss bounds calculated according to the aggregate model. (Adapted from [10] by permission of the Society of Plastic Engineers.)...

As shown in Figures 14.5 and 14.6, the magnitude and draw ratio dependence of the moduli 11 13 < 44 < 66 2nd are well predicted by the Reuss model. However, or is close to the Reuss bound... 

Figure 14.15 Draw ratio dependence of the orientation parameters of PC -h Vectra B blends. M, A, and refer to blends with 10, 30, 60, 80...

The energy equation, Eq. 9.39, should be incorporated into the model to account for temperature variation along the filament axial length. Pearson and Shah (1974) solved the system of equations subjected to a linearized analysis and found that the critical draw ratio depends, besides on the power-law index, on the dimensionless number, S ... 

Fisher and Denn (1976) presented the Unearized stability analysis for the isothermal viscoelastic case as an extension of the steady-state case presented in Section 9.1.3. The analysis showed (Fig. 9.14) that the critical draw ratio depends on the power-law index, n, and on the viscoelastic parameter a /", where a is defined in Eq. 9.83. Three regions are shown in Figure 9.14 stable, unstable, and unattainable. The lower boundary of the unattainable region is described by the relationship Dr = 1 At low values of the parameter... 

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