Carrot, relaxation

C.Carrot, J.Guillet, J.F.May, J.P.Puaux, Application of the Marquardt-Levenherg procedure to the determination of discrete relaxation spectra, Makromol. Chem., Theory Simul. 1 (1992), 215-231. 

These pareuneters were calculated for the two polyethylenes, at 160 °C, using a procedure given by Carrot et al. [41], which enables the recovery of a minimum number of relaxation times (Table 1). 

In former studies on sugars solutions and carrot stocks, the relaxation times T1 (time to recover 63 % of the magnetization) for different sugars were studied and the final D1 was set to 25 s, considering that D1 has to be 5 times bigger than ti. 40,31 we used a D1 value of 25 s. 

SmaU, R., Carrot, C., GuiUet, J. Physically meaningful discrete relaxation spectrum Rheological behavior of monodisperse polymer melts. Macromol. Theory Simul. (1996) 5, pp. 645-661... 

The model of Mead [23] includes only the terminal zone, and here the key difference from the models of Carrot and Guillet [51] and Leonardi et al. [52 ] is that the latter authors include the dependence of the terminal relaxation time on the molecular weight distribution. Leonardi et al [ 52 ] compare the predictions of their comprehensive model with those of Mead s model [23] and with experimental data. They conclude that Mead s approach is useftrl when the average molecular weight is high, i.e. when the and when the polydispersity index is... 

C) Models including Rouse relaxation (L onardi etal. Carrot and Guillet, Ruymbeke etal.)... 

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