Polyhydroxy ethers

Phenoxy Polyhydroxy ether of bisphenol A Union Carbide... 

An interesting synthesis of diglycerol, a polyhydroxy ether, has been reported involving the treatment of glycerol with calcium oxide and carbon dioxide. ... 

Abbreviations for the polymeric units in Table 2.10 (C H )- - phenyl ring, a-MS - alpha-methyl styrene, AN, acrylonitrile, BMA - butylmethacrylate, CHMA - cyclohexylmethacrylate. Cl - caprolactone, C(VC) - unit of chlorinated PVC, DNS - 2,4-dini-trostyrene-co-styrene, DTC -2,2-dimethyltrimethylenecarbonate, HFPC - hexafluoro bisphenol-A polycarbonate, MA - maleic anhydride, MMA - methylmethacrylate, PAr - unit of polyarylate, Phenoxy - unit of polyhydroxy ether of bisphenol-A, PPE - unit of poly(2,6-dimethyl-1,4-phenylene ether), S - styrene, TMPAr - unit of tetramethyl bisphenol-A polyarylate, TMPC - unit of tetramethyl bisphenol-A polycarbonate, VAc - vinyl acetate, VC - vinyl chloride, VCVAc90 - VC-co-VAc copolymer with 90 wt% VC, VME - vinylmethylether. 

PBT/ PMMA Phenoxy When a small amount of polyhydroxy ether of bisphenol-A Phenoxy) was added to the PBT/PMMA blends, the morphology changed into more regular and finer. For >50 wt% Phenoxy the blend converted to single-phase. Jo eta/., 1994... 

Structures involving the ether linkage are often employed as blend components. The thermal stability of polyoxymethylene, POM, blends with polyurethane have been studied and these were found to have higher activation energies for decomposition than either of the components [Kumar et al., 1993]. The opposite effect occurred in miscible PEG blends with Phenoxy (the polyhydroxy ether of bisphenol-A) although the degradation process was affected by composition, the addition of the Phenoxy had a negative effect on blend stability [Iriarte et al, 1989]. 

One of the methods for the synthesis of high molecular weight polyhydroxy ethers based on Bisphenol A is the base catalyzed polyaddition of the diglycidyl ether of Bisphenol A (BADGE) with Bisphenol A (BPA) in the melt or in solution (Scheme 1). 

Kozlov, G. V Mikitaev, A. K. The fractal treatment of the dependence of molecular weight on reagents concentration at polyhydroxy ether synthesis. Mater, of VI International Sci.-Pract. Conf. New Polymer Composite Materials. Nal chik, KBSU, 2010, 205-210. 

Adhesives recommended include epoxies, polyvinyl alkyl ether, polyhydroxy ether, and neoprene ruhher. 

Ph noxy Resins. Phenoxy resins are thermoplastic polymers derived from bisphenol A and epichlorohydrin. Their weight-average molecular weights (Mw) are higher (ie, >30,000) than those of conventional SERs (ie, 25,000 maximum). They lack terminal epoxides but have the same repeat imit as SERs and are classified as polyols or polyhydroxy ethers ... 

Zhang R Y, Luo X L and Ma D Z (1995) Miscibility of polyhydroxy ether of bisphenol A with ethylene terephthalate-caprolactone copolyesters, Eur Polym J 31 1011-1014. 

The calculated according to the indicated method dimensions are adduced in Table 2. As it follows from the data of this table, the values D for the studied nanocomposites are varied within the range of 1.10-1.36, i.e., they characterize more or less branched linear formations ( chains ) of nanofiller particles (aggregates of particles) in elastomeric nanocomposite structure. Let us remind that for particulate-filled composites polyhydroxi-ether/graphite the value changes within the range of 2.30-2.80 [4, 10], i.e., for these materials filler particles network is a bulk object, but not a linear one [36]. 

Ketone derivath es of formaldehyde which yield c.xplosi eis on nitration include anhy droennea-heptitol, which is prepared from formaldehyde and acetone (page 155). This polyhydroxy ether gives a pentanitrate. niehing at 132°C, as well as lower nitrated products. The teti-amethylol ketones and alcohols obtained by reactions of formaldehyde with cyclopenianone and cyclohexanone respecth ely also giA e explosive nitrates, according to Friederich . 

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