Mechanical properties of polyurethane foams modified by polymer-polyols

Maslov, A. N.; Смирнова, Л. А.; Ryabov, S. A.; Dergunov, Yu. I.

doi:10.1134/s1560090406070098

Cited by 2 publications

(2 citation statements)

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“…Polyether polyols are commonly used in the preparation of flexible or rigid polyurethane foams, 1,2 as well as in versatile fields like surfactants, lubricants 3,4 and biomedical applications. 5 Polyethers are conventionally prepared by anionic polymerization using alkali metal derivatives.…”

Section: Introductionmentioning

confidence: 99%

Combination of phosphazene base and triisobutylaluminum for the rapid synthesis of polyhydroxy telechelic poly(propylene oxide)

et al. 2012

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Anionic ring-opening polymerization of propylene oxide, initiated with protonated phosphazene alkoxides and based on monomer activation with a Lewis acid, is investigated. Alcohols bearing one or several protected hydroxyl groups, namely 1,2-isopropylideneglycerol, 1,2:3,4-di-O-isopropylidene-Dgalactopyranose and poly(propylene glycol), are firstly deprotonated with a phosphazene base. Their combination with triisobutylaluminum enables quantitative and controlled synthesis of poly(propylene oxide) in a very short time (hours), at room temperature and in hydrocarbons. The chain-ends determination showed a main population initiated by the protonated phosphazene alkoxide. A population coming from the residual transfer to monomer is also observed but in very low intensity. Molar masses of 80 000 g mol À1 with relatively narrow dispersity could be prepared. After deprotection of protected hydroxyl functions, tri-and penta-hydroxy telechelic poly(propylene oxide) were obtained. Dihydroxy telechelic polymers of high molar masses are also rapidly and directly synthesized from poly (propylene glycol).

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Section: Introductionmentioning

confidence: 99%

Combination of phosphazene base and triisobutylaluminum for the rapid synthesis of polyhydroxy telechelic poly(propylene oxide)

et al. 2012

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“…Polyethers represent interesting polymers due to their versatile functionalities and find a gamut of applications in various domains like polyurethane foams, surfactants, lubricants and bio-medicine. [1][2][3][4][5] Well-known poly(ethylene oxide-b-propylene oxide)s and their triblock analogs are widely used as macromolecular surfactants, drug encapsulating nanocarriers or gelling additives thanks to their amphiphilic behavior. [6][7][8] The hydrophilic and hydrophobic characters of these macromolecules can be modified according to the monomer structure and notably via the length of side chains in alkylene oxides.…”

Section: Introductionmentioning

confidence: 99%