POSS/poly urethane

Figure 6 Correlation between —log a, or log[a(7 )/a(7 g)] and T for poly(propylene oxide)-segmented poly(urethane urea) with dissolved salt at two concentrations [LiC104]/[P0 unit] = 0.062 (D a, [LiC104]/[PO unit] =...

Surfactants for urethane and related polymer foams are usually silicone-surfactants. These surfactants generally are copolymers of poly(dimethylsiloxane) [-Si(CH3)2-0-] , oxyalkylene chains, e.g., polyethylene oxide chain (EO) , and polypropyene oxide chains, (PO) . The copolymers can be linear, branched or pendant types. The surfactants have different functions, i.e., emulsifying, foam stabilizing, and cell-size control. 

N nylon, PO polyolefin, elastomer, TPU thermoplastic urethane, GF glass fiber, NBR nitrile rubber, MAH maleic anhydride, EPR ethylene-propylene copolymer, l ionomer, M- mineral, ABS acrylonitrile-butadiene-styrene copolymer, PPE poly (phenylene ether), R reinforcement, PTFE poly(tetrafluoroethylene), CF° carbon fiber, PEBA poly(etherblockamide), S silicone, RIPP D reaction injection molding plastic, and ASA acrylate-styrene-acrylonitrile copolymer. 

Bogart, V, John, W. C., Gibson,P. E.,Cooper, S. L. (1983), Structure- operty relationships in polycaprolactone-polyurethanes, J. Pofynt. Sci., Polym. Phys. Ed., 21,65-95. Bogdanov, B., Toncheva, V., Schacht, E., Finefli, L., Sartib, B., Scandola, M. (1999), Physical properties of poly(ester-urethanes) prepared Irom diflerent molar mass polycaprolactone-diols,Po/yraer, 40, 3171-82. 

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