Milling duration

Filling Ratio and Milling Duration. The filling ratio, rj, the ratio of the quantity of materials to be processed (polyethylene terephthalate and diamine) to the milling bodies (spherical particles 9 mm in... 

Milling Duration = 24 hours Temperature = 18° 1°C) Chemically Linked Aggregation Nitrogen ... 

Figure 14. Influence of milling duration on mechanochemical com-jlexation for the system polyethylene terephthalate, ethylenediamine and ferric chloride...

For the second method, samples obtained from reactions run under different conditions (milling duration, ratio of reactants and inorganic salt, etc.) were used (see Figures 18 through 22). The results show that the fraction of thermostable polymer from both Fe3+ and Mn2+ complexes increased with an increase in chemically linked nitrogen quantity which, in turn, was determined by the established parameters. 

Analysis of the results presented in Figures 3.221 and 3.222 shows that the molecular weight is reduced (according to an exponential low characteristic to the mechanical processes) at the same time with the increase of the vibratory milling duration (Figure 3.221 curve 1), while the specific surface registers a relative continuous increase (Figure 3.221 curve 2). 

Figure 3.222. Influence of vibratory milling duration (in methanol) on some characteristics of PVC-S. 1) M 2) specific surface (AS, %) 3) plasticizer sorption (W, %).

The analysis of the reacted diamine amount has therefore pointed out its dependence on the milling duration, on the diamine quantity from the PVC mixture subjected to the reaction and on the micromolecular compound chemical nature. 

The influence of the milling duration is reflected by the results given in Table 3.79. 

In the present study, synthesis of doped ATLS with general formula Laio-x-zAxSi6-yBy027-x/2-y/2-3z/2 (A = Sr B = Al, Fe x = 0- 3 y = 0- 1.5 z = 0 0.67) has been conducted via mechanical activation (MA) of solid precursors and using polymerized ethylene glycol-citric acid polyester precursors (Pechini (Pe)) route. To find optimal parameters of the synthesis, the effect of the dopant nature and its parent compoimds, milling duration, temperature of MA products annealing on the doped ATLS formation has been studied. Phase, structural and microstructural studies have been carried out to clarify the mechanism of Al and Fe-doped lanthanum silicates formation in the mixtures with different parent compounds. 

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