New bis(naphthalic anhydrides) and polyheteroarylenes based on them with improved processability

Rusanov, A. L.

doi:10.1070/rc1992v061n04abeh000956

Cited by 16 publications

(3 citation statements)

References 2 publications

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“…The phenolate anion and the aza‐nitrogen anion, formed upon the reaction between DHPZ and potassium carbonate, underwent a nucleophilic aromatic substitution reaction to produce a bis(ether imide) ( 2 ) in yields ranging from 87% yield. The formation of the NC bond in an aromatic system usually proceeds under rather vigorous reaction conditions 29. The acidity of the NH group is higher than that of the OH group, and so the formation of NC in 2 was conducted at a higher temperature or for a long time to compensate for the greatly reduced nucleophilicity of the aza‐nitrogen anion.…”

Section: Resultsmentioning

confidence: 99%

Poly(ether imide)s derived from phthalazinone‐containing dianhydrides

Wang

Liao

Cheng

et al. 2004

J. Polym. Sci. A Polym. Chem.

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An unsymmetrical and noncoplanar heterocyclic dianhydride was synthesized from a bisphenol-like phthalazinone, 4-(4-hydroxylphenyl)-2,3-phthalazin-1-one, and a series of novel poly(ether imide)s based on it, with intrinsic viscosities of 0.67-1.42 dL/g, were obtained by one-step solution polymerization in m-cresol at 200°C for 20 h. The polymers were readily soluble in N-methyl-2-pyrrolidinone and m-cresol. The poly(ether imide)s derived from 4,4Ј-oxydianiline and 4,4Ј-methylenedianiline were also very soluble in chloroform, 1,1Ј,2,2Ј-tetrachloroethane, and N,N-dimethylacetamide. The glass-transition temperatures were 289 -326°C, as determined by differential scanning calorimetry. All the degradation temperatures for 5% weight loss occurred above 482°C in nitrogen. The tensile strength of thin films of some of the polymers varied from 103.1 to 121.4 MPa.

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Section: Resultsmentioning

confidence: 99%

Poly(ether imide)s derived from phthalazinone‐containing dianhydrides

Wang

Liao

Cheng

et al. 2004

J. Polym. Sci. A Polym. Chem.

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“…Other diamines were used for a similar purpose and these were the following: In general, poly(naphthylimides) containing six-membered imide rings in backbones are characterised by significantly improved chemical resistance compared to analogous poly(phthalimides) [144][145][146][147]. A similar conclusion was made comparing the chemical resistance of sulfonated polyimides and poly(naphthylimides) [124,125].…”

Section: Scheme 14mentioning

confidence: 91%

Proton-Exchanging Electrolyte Membranes Based on Aromatic Condensation Polymers

Rusanov¹,

Likhatchev²,

Kostoglodov³

et al. 2005

Inorganic Polymeric Nanocomposites and Membranes

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“…5 Replacing one of phthalic anhydrides in BTDA with a naphthalic anhydride would give a new unsymmetric dianhydride which to our knowledge has not been reported in the literature. Since the new monomer is molecularly unsymmetric, the resulting polyimides should possess three possible diads in the main chain which lead to a better solubility than the BTDA-and bis(naphthalic anhydride)-based polyimides 6 and maintain other desirable properties such as high thermal stability (due to the naphthalimide unit). Furthermore, due to the presence of two different anhydrides, it is possible to control the structures and properties of copolyimides using BNTDA.…”

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confidence: 99%