Oxyethylene diols

Experimental sample Polyoxypropylene-oxyethylene diol containing 20 weight percent oxyethylene moieties. ... 

PET (1993) L-lactic acid and oxyethylene diols Hydrolysis in a buffer at 60 °C [118]... 

A carboxyl-terminated unsaturated polyester was esterified with poly(oxy-ethylene) diols [70]. Using poly(oxyethylene) diol with a munber average molecular weight of 2000, partly crystalline block copolymers were obtained. The unsaturated block copolyether ester contained predominantly one terminal polyether group per molecule. Block unsaturated copolyetheresters with shorter poly(oxyethylene) terminal groups of M = 350 and 550 were also obtained. The effect of the composition of those UPRs on the mechanical and thermal properties was investigated [70]. The block copolyetherester with Mn = 2000 can be dissolved in styrene monomer, thus forming a UPR with acceptable viscosity at as little as 20% styrene. 

Figure 26 shows storage and loss moduli, G and G", measured for an immiscible blend of poly(oxyethylene)diol (POE 7o = 169Pas) and poly( dimethyl siloxane) (PDMS ... 

MALDI-TOF analysis also revealed that transesterification reactions between propylene carbonate and diols containing six or more carbon atoms in the molecule, carried out in esence of a coordination catalyst, lead to almost pure oligocarbonate diols. When ethylene carbonate (EtC) was used, the resultant polymer contained a different combinahon of ethylene carbonate and ethylene oxide units. The transesterification with EtC, carried out in the presence of catalysts, such as K2CO3 and CsF, leads to oligomers with high amoxmts of oxyethylene fragmenfs. ... 

Chem. Descrip. Diol-started linear polymer, oxyethylene (75%), oxypropylene (25%)... 

Polyethylene glycols (PEG) are oligomeric diols of the general formula HO- CH -CH -O H, which are commercially available also under the trade name of Carbowax. They can be regarded as protic solvents with aprotic sites of binding constituted by the oxyethylene units -(CH -CH2 "0) ... 

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