Polymer resin polypropylene glycol

Polypropylene glycol (9) PPG 400 Definition Polymer of propylene oxide Formula H(OCH2CHCH3)nOH, avg. n = 9 Properties Nonionic Toxicology TSCA listed Uses Chemical intermediate intermediate yielding esters useful as lubricants, defoamers in rubber, pharmaceuticals antifoam in fermentation and paints antiblooming agent for pentachlorophenol-treated wood binder and lubricant for ceramics plasticizer of resin-treated papers mold release applies. emollient, solvent in cosmetics, pharmaceuticals boiler water additive (food contact) in food-pkg. adhesives Features Provides low odor, low irritation, low toxicity to personal care prods. 

Silicone pre-polymer (isocyanate group) + hydroxy compound in oils polyesters, or polyhydric alcohols. (ii) Typical example is the reaction between TDI and polypropylene glycol to form an isocyanide terminated pre-polymer Silicone resin silicone/alkyd resin Good weather discoloration... 

In contrast to resins, which normally increase the glass transition temperature of the polymer, plasticisers decrease the Tg and make the polymer softer. This results in faster wetting of a surface and increases the initial peel strength. This occurs at the expense of cohesion and heat resistance. Common plasticisers are phthalates, such as dioctylphthalate. Polypropylene glycol alkyl phenyl ether is a special polymeric plasticiser which is extremely well compatible with acrylics and does not migrate. 

Iron oxide nanocomposites have been prepared by hydrolysis of iron salts in sulfonated polystyrene resins, mesoporous sulfonated styrene-divinylbenzene copolymer, acrylonitrile-methyl methaciylate-divinylbenzene copolymer, cross-linked high amylose starch, polyimides, polyvinylpyridine, polypyrrole,eellulosies. Nanocomposites of metals (Cr, Mo, W, Fe, Co, Ni) with a variable particle size (2-10 mn), have been prepared from solutions of metal preeursors in a molten polymer (polyethylene, polypropylene, polytetra-fluoroethylene, polyamide, polyaiylate, polycarbonate, polystyrene, polyethers, polyphenyleneoxide, siloxane). There are also many examples of in-situ precipitation of iron oxides in aqueous solution of polymers, such as dextran, PVA, polyethylene glycol, etc. In this case, size dispersion and aggregation are frequent, but they can be minimized by using reverse micelles. ... 

Figure 9-23. Time evolution of mass losses for different polymers treated by oxygen plasma (1) polysulphone, (2) polypropylene, (3) low-density polyethylene, (4) polyethylene-glycol-terephthalate, (5) polystyrene, (6) polytetra fluorethylene (PTFE), (7) resin based on natural caoutchouc.

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