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Poly-1,3-dioxolan

Keele Polymer Group, and their PMR-spectrum agreed with that in the literature. What puzzled us was that he could find no end-groups by any of the conventional methods. We were encouraged, however, by a DuPont patent for the preparation of poly-1,3-dioxolan, in which the inventor had recorded that no end-groups could be found in the polymers. This absence of end-groups in our polymers was the principal problem that determined the direction of our researches 70, 72, 73. ... [Pg.727]

Table 1 The content of fert-oxonium ions in poly(1,3-dioxolan)s ... Table 1 The content of fert-oxonium ions in poly(1,3-dioxolan)s ...
Table 3 Concentration of hydroxyl groups in poly(1,3-dioxolane)s a... Table 3 Concentration of hydroxyl groups in poly(1,3-dioxolane)s a...
Cyclic oligomers with x - 2-9 are found to be present in poly(1,3-dioxolane) samples prepared by monomer-polymer-equilibrations using boron trifluoride diethyl etherate as catalyst. The molecular cyclization equilibrium constants 7fx are measured and the values are in agreement with those calculated by the Jacobson-Stockmayer theory, using an RIS model to describe the statistical conformations of the corresponding chains and assuming that the chains obey Gaussian statistics. [Pg.117]

Due to the fast equilibration of the system, the DP of the product is equal to the ratio of concentration of monomer and low molecular weight formal. A similar approach was used to prepare poly (1,3-dioxolane) containing two acrylate end groups [275]. [Pg.532]

Fig. 11. Experimental molar cyclization equilibrium constants Kx (in mol dm ) in undiluted (o) and solution ( ) equilibrates of poly( 1,3-dioxolane) at 333 K compared with values calculated (x) by the J obson and Stockmiqrer theory... Fig. 11. Experimental molar cyclization equilibrium constants Kx (in mol dm ) in undiluted (o) and solution ( ) equilibrates of poly( 1,3-dioxolane) at 333 K compared with values calculated (x) by the J obson and Stockmiqrer theory...
Andrews JM, Semiyen JA. Equilibrium ring concentrations and the statistical conformations of polymer chains part 7. CycHcs in poly(1,3-dioxolane). Polymer. 1972 13 142-144. [Pg.70]

THERMODYNAMICS OF POLYMERIZATION OF HETEROCYCLIC COMPOUNDS. V. HEAT CAPACITY, ENTROPY, ENTHALPY, POLY-1,3-DIOXOLANE. [Pg.219]

Poly(1,4-frar7s-isoprene) Poly(trimethylene sulfide) Poly(3,3-dimethyloxetane) Poly(3,3-dimethylthietane) Poly(tetramethylene oxide) Poly(1,3-dioxolane) Poly(pentamethylene sulfide) Poly(thiodiethylene glycol) Poly(hexamethylene oxide) Poly(6-aminocaproamide)... [Pg.48]

LB Number Substanee 1 CAS Number 1 Substanee 2 CAS Number 2 2 050 poly( 1,3 -dioxolane) 25067-64-5 water 7732-18-5 ... [Pg.89]

Poly( 1,3-dioxolane), see Poly(ethyleneoxymethylene oxide) Poly(l,3 dioxolane), see Poly(methyleneoxytetramethylene oxide) Poly(dodecametbylene oxide)... [Pg.927]

See other pages where Poly-1,3-dioxolan is mentioned: [Pg.275]    [Pg.14]    [Pg.117]    [Pg.118]    [Pg.118]    [Pg.129]    [Pg.25]    [Pg.59]    [Pg.59]    [Pg.60]    [Pg.59]    [Pg.60]    [Pg.445]    [Pg.446]    [Pg.447]    [Pg.1071]    [Pg.70]    [Pg.78]    [Pg.96]    [Pg.445]    [Pg.446]    [Pg.447]    [Pg.849]    [Pg.295]    [Pg.295]    [Pg.67]    [Pg.69]    [Pg.460]    [Pg.460]    [Pg.1564]    [Pg.2399]    [Pg.2471]    [Pg.954]    [Pg.1905]   
See also in sourсe #XX -- [ Pg.67 ]



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