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- W2018533766 abstract "A new procedure to obtain high molecular weight poly(1,2-dihydroxybenzene phthalates) by bulk polymerization of some spiro-compounds is described. O,O'-Phthalid-3-ylidenecatechol (I) and 4-methyl-O,O'-phthalid-3-ylidenecatechol (II) spiro-compounds have been synthesized and used as monomers. Poly(1,2-dihydroxybenzene phthalate) (III) and poly(1,2-dihydroxy-4-methylbenzene phthalate) (IV) have been prepared by heating at 200°C of spiro-compounds I and II respectively ; without addition of catalyst. The resulting polyesters III and IV have been characterized by GPC, TG, DSC, NMR, FAB-MS, and MALDI-TOF MS analyses. The GPC curves of the obtained materials showed that high molecular weight polyesters, containing only a very little amount of low molecular weight oligomers, have been formed. The structural characterization of these polyesters by FAB and MALDI-TOF mass spectrometric analyses showed that they are constituted exclusively of open-chain macromolecules having both hydroxy end-groups. Data collected suggest that in the bulk polymerization of spiro-compounds I and II a possible chain growth mechanism of polymerization is active, which is strongly inhibited by acid species." @default.
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- W2018533766 title "Synthesis and MALDI-TOF MS Characterization of High Molecular Weight Poly(1,2-dihydroxybenzene phthalates) Obtained by Uncatalyzed Bulk Polymerization of <i>O</i>,<i>O</i>‘-Phthalid-3-ylidenecatechol or 4-Methyl-<i>O</i>,<i>O</i>‘-phthalid-3-ylidenecatechol" @default.
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- W2018533766 doi "https://doi.org/10.1021/ma960051+" @default.
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