Pentaerythritol ethoxylate

A photoreactive macromer consisting of the reaction product of poly(capro-lactone-co-lactide) and pentaerythritol ethoxylate was prepared by Chudzik et al. (3) and used as tissue implants. 

Hydrophilic pEG or pentaerythritol ethoxylate cores with hyperbranched polystyrene arms were prepared by reacting PEG or pentaerythritol ethoxylate with 2-bromopropionyl bromide followed by the ATRP of the macroinitiator and chloromethylstyrene to produce the amphiphilic hyperbranched polymer. Depending on the functionality of the macroinitiator, the products have either a dumbbell or 4-arm starburst structure. The dumbbell polymers tend to have... 

Precision synthesis of microstructures in star-shaped copolymers of 8-caprolactone, LLA, and DXO was accomplished using a spirocyclic tin initiator and stannous(II) octoate (cocatalyst) together with pentaerythritol ethoxylate (coinitiator) [109]. 

Pentaerythritol ethoxylate (EO/OH 15/4), e-caprolactone, doxorubicin hydrochloride (DOXHCl), 2-diphenyl-l,3,5-hexatriene (DPH), and dimethylsulfoxide (DMSO) were purchased from Sigma-Aldrich Chem. Co. Inc. The stannous octoate (Sn(Oct)2) was obtained from MP Biomedicals Inc., USA. The tetrahydrofuran (TIIF) was distilled from metallic sodium and benzophenone. Triethylamine (TEA), hexane and diethyl ether were purchased from ECHO Chemicals (MiaoU, Taiwan). Cystamine dihydrochloride (Cystamine 2HC1, >98 %) was purchased from Acros Organics, New Jersey, USA. 

Figure I. Pentaerythritol ethoxylate, a starlike PEG oligomer linked to PHB...

Figure 8.1 A schematic representation of the hydroxy-functional hyperbranched polyester Boltorn H20, based on ethoxylated pentaerythritol and 2,2-bis(methylol)propionic acid [10]...

A flame-dried 1-liter reactor was charged with ethoxylated pentaerythritol tetrakis-(3-mercaptopropionate) (46.3 mmol), the step 1 product (185 mmol), and 300 ml of dioxane and then treated with 2,2 -azobisisobutyronitrile (4 mmol). The mixture was then heated to 70°C for 36 hours and concentrated. The residue was purified by column chromatography with hexane/acetone, 30 70, respectively, and the product isolated as a dark orange viscous liquid. 

The structure for the step 2 reagent, ethoxylated pentaerythritol tetrakis(3-mercaptopropionate), (I), is illustrated below. 

Chowdhury, R. Electron-beam-induced crosslinking of natural lubber/acrylonitrile-butadiene rubber latex blends in the presence of ethoxylated pentaerythritol tetraaciylate used as a crosslinking promoter. J. Appl. Polym. Sci. 103, 1206-1214 (2007)... 

Ethoxylated trimethylol propane triacrylate Ditrimethylol propane tetraacrylate Dipentaerythritol pentaacrylate Ethoxylated pentaerythritol tetraacrylate Anthracenes... 

Four-arm star-shaped PDLLA oligomers of controlled molar mass and narrow molar mass distribution were synthesized by using ethoxylated pentaerythritol initiator. The terminal hydroxyl group was converted to methacrylate... 

A variety of hydroxy-terminated unsaturated polyesters have been evaluated as intermediates in polyurethane foams.These intermediates include the ethoxylated or propoxylated derivatives of lignin-, sorbitol-pentaerythritol-MA condensation products. " MA has also been blended with poly(vinyl chloride) and diisocyanates to obtain cellular PVC materials. "- " ... 

This study has synthesized star-shaped EOL-PEG-PCL copolymer by using ethoxylated pentaerythritol initiator as... 

The experimental work reported so far may be subdivided into two groups firstly, polycondensations based on nucleophilic monomers (which will be discussed first), and secondly, polycondensations involving electrophilic monomers. In principle, pentaerythritol, threitol or the methyl glycoside of glucose may be considered to be usefiil and relatively inexpensive b4 monomers. However, all these tetraols are poorly soluble in inert reaction media. Therefore, ethoxylated pentaerythritols ore the mercaptoacetate and mercaptopropionate were used (see Formula 12.6). Two versions of ethoxylated pentaerythritols (EPEs) are commercial and served as reaction partners of dicarboxylic acid dichlorides (DADs). The monomer called EPE-3 contains on the average three ethylene oxide units, whereas 15 ethylene oxide units are typical for EPE-15. 

---