Maxwellian relaxation curve

Fig. 6. The variation of relative retardation with time for L2 at various thicknesses d ranging from 200 to 1763 pm. Solid-line curve is a calculated Maxwellian relaxation curve.

In Fig. 8 an experimental result for the sample L2 of thickness 380 ym (curve a in Fig. 8) is compared with a Maxwellian relaxation curve (curve b in Fig. 8). Both curves deviate from each other at larger t. In the first approximation, the deviation is considered to have been brought by the wall effect, i.e. the appearance of B-phase. The B-phase will grow with time under the influence of wall effect to some extent [the volume fraction of which is denoted here by Xg( ). This is schematically illustrated in Fig. 7. When the transformation into the B-phase is assumed to be analogous to one-demensional crystal-crystal transformation, the volume fraction of B-phase at t = t is given by... 

Fig. 8. [Top]. Experimental result for L2 of thickness 380 ym (O) is compared with a Maxwellian relaxation curve. 

Solid line (a) Combination result of curve C and d. Thick solid line (b) Maxwellian relaxation curve. 

Solid line (C) Maxwellian relaxation curve taking into account the fractional volume change of A-phase. Solid line (d) Contribution of wall effects. 

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