Dialkyl itaconate

It was also reported experimental results about the preferential adsorption of a family of poly(dialkyl itaconates) [poly[l - (alkoxycarbonyl) - 1 - [(alkoxycar-bonyl) - methyl] ethylene] in 1,4 - dioxane/methanol. The chemical structures of the polymers are shown Fig. 1.18 [122],... 

Fig. 1.20 Comparison of theory and experiment for the preferential adsorption coefficient, X, of poly(dialkyl itaconates) in 1,4-dioxane/methanol (pBO = methanol volume fraction). Points experimental results for PDMI (o), (alkyl = Me) PDEI (A) (Et) PDPI ( ) (nPr) PDBI (.) (nBu). Curves Association equilibria theory calculated with the set of parameter values shown in Table II. (From ref. [122])...

The bulk polymerization rates in the homologous series of dialkyl itaconates increase as the alkyl groups are lengthened from methyl through octyl 10). These rates, expressed in terms of the constant, in the expression Rp = kp (M) are summarized in Table 1. The... 

Data relating intrinsic viscosity and molecular weights are not available for any of the polymers of the dialkyl itaconates. Polymethyl methacrylate constants have been used to estimate molecular weights for the polydiethyl itaconates but the exactness of such an approximation is difficult to judge. While exact molecular weights cannot be... 

Table 2. Intrinsic viscosities of dialkyl itaconate hulk polymers...

Polymers of the dialkyl itaconates are similar in hardne to polymers of the corresponding alkyl methacrylates. Polydimethyl itaconate and polydiethyl itaconate are hard, clear, glassy pol5uners of some brittleness, which fe probably due to the relatively low molecular weight of the homopolymers. Polydi-M-butyl itaconate is soft with little or no tack depending upon the molecular weight. Polymers of higher dialkyl ita-... 

It has extended the same theoretical treatment to other closely related systems, a family of poly(dialkyl itaconates). " Preferential adsorption coefficient X was determined and calculated according to the association equilibria theory, and using classical thermodynamic theories. 

Dialkyl itaconate Single Tg I had 23,47,60,84, or 93 mol% a-methylstyrene II had dialkyl group of dimediyl, diethyl, or di-t-butyl or di- -propyl Cowie and Reilly (1993a)... 

Dialkyl itaconate Single Tg FTIR II had a dialkyl group of mediyl, ethyl, bis [2- [2-(2-methoxye1hoxy) ethoxyjethyl], or bis [2-(2-methoxyethoxy)ethyl] Hong et al. (1995b), Landry et al. (1993a)... 

Dialkyl itaconate Single Tg II had an alkyl group of methyl, 2-chloroetiiyl or 3-chloropropyl Opazo et al. (1994)... 

The propagating radical of dialkyl itaconate in the homogeneous polymerization was foimd by Sato et al. to be stable enough to be observed by ESR even above 60 °C. Fig. 62 a displays the 5-line spectra obtained when dimethyl 2,2 -azobis-isobutyrate, benzoylperoxide, and di-tert-butylperoxide were used as initiators. On the other hand, the polymerization of DBI initiated with azonitriles such as 2,2 -azobisisobutyronitrile, 2,2 -azobis(2,4-dimethylvaleronitrile), and cyclohexanecarbo-... 

The synthesis of 4-carboxy-2-piperidone entailed addition of hydrogen cyanide to dialkyl itaconate, emd reductive cycliza-tion of the resulting dialkyl cyanomethyl succinate to 4-alkoxy-carbonyl-2-piperidone followed by saponification (7). The other member of this group, 4-c u boxy-2-pyrrolldone, was obtained from its methylester which was synthesized via esterification of amino methyl succinic acid (B). The 6,6 dimethyl-4-carboxy-2-plperidone was synthesized by reductive cyclization of methyl 3-methoxy-... 

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