Epoxidized polypropylene glycol

Figure 11.28. Glass transition temperature, Tg, and crystallization temperature, T, of polylactide plasticized with variable amounts of epoxidized polypropylene glycol having molecular weight of 640 daltons. [Data from McCarthy S Song X, Antec 2001.Conference proceedings, Dallas, Texas, 6th-10th May, 2001, paper 363.]...

Polyether diols form a very important segment of the diols used in the manufacture of polyurethanes. The normal route is by addition polymerization of the appropriate monomeric epoxide. The most important polyethers are polypropylene glycol (C3) and polytetramethylene glycol (C4). The manufacturing route is given in Figure 2.10. 

Polyether-polyols are produced by the poiyaddition of an epoxide (propylene or ethylene oxide) to an active hydrogen initiator (polyol, amine, add. water, etc.). Polypropylene glycol PPG) is obtained by the poiyaddition of propylene oxide to propylene glycol, used as an initiator ... 

Polymeric glycols such as polypropylene glycol may be epoxidized through the terminal hydroxy groups to give diglycidyl ethers (VII). 

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). 

Butyl benzyl phthalate DIcycbhexyl phthalate Dllsononyl adipate Dioctyl adipate Epoxidized linseed oH Polyisobutene Polypropylene glycol PPG-20-, PPG-26... 

Polypropylene glycol diglycidyl ether (Riew et al. 1976) Epoxide end groups... 

Additives used in final products Plasticizers polyethylene glycol, polypropylene glycol, partial fatty ester, glucose monoester, citrate, adipate and azelate esters, epoxidized soybean oil, acetylated coconut oil, linseed oil, acetyl tributyl citrate, glycerol triacetate, glycerol tripropionate Antistatics ethoxylated fatty amines, polyethylene glycol ester, quaternary ammonium salt Antiblocking diatomaceous earth, talc Slip erucamide ... 

Ethylene oxide (EO), propylene oxide (PO), and butylene oxide (BO) can be polymerized to polyethylene glycols (PEGs), polypropylene glycols, and polybutylene glycols. In addition, however, mixtures of the foregoing epoxides can be polymerized with one another, whereupon we obtain a random polymer. In addition to water, alcohols, phenols, amines, and so forth can be used for the starting molecule (i.e., variation of R in reaction (1)). When alcohols are employed, polyethylene glycol monoalkyl ether is obtained. 

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