Temperature extrapolated offset

Sariban et al. [101, 107, 276, 277] were the first to emphasize that the Ising critical behavior can be seen in polymer mixtures for not too long chains and verified it by their simulations. A consequence of Ising behavior that is easily verified by experiment is that the spinodal temperature (or mean field critical temperature T F, respectively) which is defined for 4>A = < >Acrit from a linear extrapolation of the inverse scattering intensity S fq = 0) with temperature to the point where S, n(q = 0) = 0 must be offset from the actual critical temperature Tc (Fig. 32). This phenomenon has been seen in simulations [92,101,107] as well as in various experiments [69, 71, 215, 216, 278], A detailed analysis of the non-mean field critical behavior has allowed the estimation of critical exponents y = 1.26 0.01 [215-217,69], v = 0.59 + 0.01 [215] or v as 0.63 [71], and also the exponent describing the decay of correlations at Tc has been estimated [215], 0.047 0.004. These numbers are in fair agreement with... 

TTie extrapolated temperature of the point of infl exion of the TGA curve (offset point) is found in the range from 500-550 °C with the exception of low boiling samples 23, 24, and 25, which exhibit temperatures from 325-375 °C. Statistical evaluation of the temperatures gives the following results ... 

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