Labeled atactic polypropylene

LAPP labeled atactic polypropylene LIFT lateral ignition flame spread test... 

Fig. 22. Specific radioactivity (and corresponding values of —CjHj mol. per mol. of polymerized CaHj) of the non-atactic polypropylene fraction, as function of the square root of the alkylaluminum concentration. (Tests performed with

Fio. 32. Relation between the reciprocal of the intrinsic viscosity raised to 1.35 (proportional to the reciprocal of polymerization degree) of the non-atactic polypropylene fraction and the number of mol. of —CjHs groups found in the polymer. (Tests performed with >[Pg.42]

Fig. 10.8. Extrema separation vs. temperature of fractured atactic polypropylene labeled with nitroxide radical O, before melt , after melt (Ref )...

FIG. 3 Different chain conformations of atactic polypropylene as a methane penetrant (sphere labeled p) jumps between two sorption states. Text labels indicate the extent along the reaction coordinate. Differences between the positions of dashed and solid triangles indicate the motion of chain segments to create a more open channel for diffusion. Conformations are adapted from Movie 1 in [90]. 

Calibration may be made against polymers containing C labelled monomer, atactic polypropylene or hydrogenated 1,4-polyisoprene but it is found that uncertainty in the results appears to be rather... 

In order to illustrate the fractionated crystallization behavior we will present here previous results on immiscible atactic PS and isotactic polypropylene blends (iPP) [68]. The cooling behavior of PS, iPP and an 80/20 PS/iPP blend is presented in Fig. 1, as well as that of an unmixed blend , labeled... 

Figiire 5- Fluorescently labelled polypropylene containing ty weight of iinlahelled atactic polymer, crystallized and annealed at ll+O °C. (a) Fluorescence mode and (b) visible transmission. Daxk... 

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