Charlesby-Pinner plots

Figure 4. Charlesby-Pinner plot of GMC, PCLS, and polydisperse PS using...

Figure 8. Charlesby -Pinner plot of nearly mono and polydisperse PS of...

Fig. 9 Sol-gel analysis of PVP gel. (a) Gel content versus radiation dose (e-beam) (b) Charlesby-Pinner plot (with regression line).The gelation dose is determined to Dg = 94 kGy from the intercept follows po/ijo = 103. Reprinted from Burkert et al. (2007a), p. 1326. Copyright (2007), with permission from Elsevier...

Otherwise, it can be determined from the modified Charlesby-Pinner plot using an appropriate computer algorithm. The fit of measured sol fraction in dependence on dose D enables us to calculate Dy, Dg, and po /qo. 

Charlesby-Pinner plot of pure poly(vinyl methyl ether) (PVME) (white triangle), pure poly(vinylpyrrolidinone) (PVP) (black triangle), and a 1 1 mixture (black circle electron beam white circle y-irradiation) s corresponds to the sol fraction and D to the radiation dose. (From Gottlieb, R., Schmidt, T., Arndt, K., Synthesis of temperature-sensitive hydrogel blends by high-energy irradiation. Nuclear Instruments and Methods in Physics Research Section B Beam Interactions with Materials and Atoms 2005,236,371-376. With permission.)... 

Fig. 1S.17. Charlesby-Pinner plot of irradiated for grafting to PMMA. Large curvatures of the...

Figure 4. Charlesby-Pinner Plots for a, Polymer 1 and b, Polymer 2.

Charlesby-Pinner s plot (8) did not give a straight line for the data of gel formation in the presence of CTFE. 

The GPC technique was used to determine gel formation. Figure 13 shows the soluble fraction of aromatic polysulfone I measured with this technique after irradiation at 30 and 150°C. The relative radiation resistance of different polymers can be obtained by comparison of the gel doses (the highest dose for complete solubility of the polymer) provided that the initial molar masses of the of the polymers are known, or from G(S) and G (X) values these can be derived from the dose dependence of the soluble fractions beyond the gel dose, using a Charlesby-Pinner, or Saito-type plot with allowance for the molar mass distribution. 

Gel fractions as a function of absorbed dose were measured for GMC using the conventional Soxhlet extraction method and these results compared with values found from the above method. Figure 5 is a plot of gel fraction (soxhlet method) versus absorbed dose for GMC. (rgej) equals 2.5 0.1 Mrad as compared to 2.1 Mrads found from the new technique. Above 2.5 Mrads an insoluble gel was rapidly formed with the gel fraction approaching a limiting asymptotic value of 1.0 at doses greater than 25 Mrad. The Charlesby-Pinner... 

Several modifications to the Charlesby—Pinner relationship that deal with deviation from the initial random distribution have been published [30-32]. In some cases a plot of s + Js against where k can vary from 0.42 to 0.55 leads to a better linear relationship for polyethylenes [28]. Vinyl group endUnking can also be taken into account with the following relationship [33] ... 

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