Polypropylene glycols characteristics

Table 4.4 The characteristics of polyether die (polypropylene glycols >ls, PO homopolymers ...

A critical factor in the success of a particular separation in an ABS may be the choice of polymer. The polymer not only affects the distribution of the solute between the phases but also has a considerable effect on the physical characteristics of the phases. It may be possible to fine-tune the polymer-rich phase by choosing from a variety of commercially available polymers whose hydrophobicity increases as PEG < Pluronic [block PEG/ polypropylene glycol (PPG) copolymers] < PPG < polytetramethylene glycol (Fig. 3 [36—40]). PPG-2000 is essentially water insoluble (and thus can be utilized neat) but is included for comparison with the ABS systems. The Pluronic polymer used, L64, has a very narrow range of usefulness [41], At low polymer and salt concentrations it forms a monophasic system. If the concentration of polymer and salt is too high, the polymer tends to foam out of solution. 

Details A liquid with a characteristic smell of natural gas/ether/benzene, and an epoxide. It is used to produce polyether polyols and the polymer polypropylene oxide (polypropylene glycol) and used as a preservative, and in thermobaric weapons (also called high-impulse thermobaric weapons or fuel-air explosives). 

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