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- W2010396311 abstract "A series of new high molecular weight poly(arylene ether)s containing the 1,2-dihydro-4-phenyl(2H)phthalazinone moiety have been synthesized. The inherent viscosities of these polymers are in the range of 0.33-0.64 dL/g. They are amorphous and readily soluble in chloroform, DMF, and DMAc. The glass transition temperatures of the polymers range from 241 to 320°C and the 5% weight loss temperatures in nitrogen atmosphere range from 473 to 517°C. The hydroxy group in the monomer 1,2-dihydro-4-(4-hydroxyphenyl)(2H)phthalazin-1-one has been selectively transformed into the N,N'-dimethylthiocarbamate group, which was then rearranged to give the S-(N,N'-dimethylcarbamate) group via the Newman-Kwart rearrangement reaction. A series of poly ( arylene thioether)s containing the 1,2-dihydro-4-phenyl(2H)phthalazinone moiety have also been synthesized via two types of reactions, a N-C coupling reaction and a one-pot reaction between the S-(N,N'-dimethylcarbamate) and activated dihalo compounds, in diphenyl sulfone in the presence of a cesium carbonate and calcium carbonate mixture. These poly( arylene thioether)s also have high glass transition temperatures (ranging from 217-303°C) and high thermal stabilities. Compared with their poly(ether) analogs, the poly(arylene thioether)s have glass transition temperatures several degrees lower, which is attributed to the more flexible C-S-C bonds." @default.
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- W2010396311 date "1998-02-01" @default.
- W2010396311 modified "2023-10-16" @default.
- W2010396311 title "Poly(arylene ether)s and poly(arylene thioether)s containing the 1,2-dihydro-4-phenyl(2H)- phthalazinone moiety" @default.
- W2010396311 doi "https://doi.org/10.1002/(sici)1099-0518(199802)36:3<455::aid-pola9>3.0.co;2-q" @default.
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