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Titolo:
SYNTHESIS OF PHOTO-RESPONSIVE POLYAMIDES CONTAINING NORBORNADIENE RESIDUES IN THE MAIN-CHAIN USING DIISOCYANATES
Autore:
TAKAMURA S; KAMEYAMA A; NISHIKUBO T;
Indirizzi:
KANAGAWA UNIV,FAC ENGN,DEPT APPL CHEM,KANAGAWA KU YOKOHAMA 221 KANAGAWA JAPAN
Titolo Testata:
Kobunshi ronbunshu
fascicolo: 7, volume: 52, anno: 1995,
pagine: 415 - 420
SICI:
0386-2186(1995)52:7<415:SOPPCN>2.0.ZU;2-V
Fonte:
ISI
Lingua:
JPN
Soggetto:
VALENCE ISOMERIZATION; PORPHYRIN COMPLEXES; POLYMERS; MOIETIES; QUADRICYCLANE;
Keywords:
2,5-NORBORNADIENE-2,3-DICARBOXYLIC ACID; DIISOCYANATE; PHOTORESPONSIVE POLYAMIDE; NORBORNADIENE RESIDUE; POLYCONDENSATION REACTION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
15
Recensione:
Indirizzi per estratti:
Citazione:
S. Takamura et al., "SYNTHESIS OF PHOTO-RESPONSIVE POLYAMIDES CONTAINING NORBORNADIENE RESIDUES IN THE MAIN-CHAIN USING DIISOCYANATES", Kobunshi ronbunshu, 52(7), 1995, pp. 415-420

Abstract

Several new photo-responsive polyamides containing norbornadiene (NBD) residue in the main chain were synthesized by the polycondensation of 2,5-NBD-2,3-dicarboxylic acid (NDC) with diisocyanates. From a polycondensation without catalyst in sulfolane at 80 degrees C for 24 h, NBD polyamide having a number average molecular weight of (M(n))=11000 was obtained. In the reaction using various catalysts, however, it was found that the molecular weight of the resulting polymer did not increase. The reaction was investigated in various solvents without catalyst. The reaction proceeded very smoothly in dimethyl sulfoxide (DMSO) at room temperature to give the corresponding polymer with M(R)=8000. When the reaction was carried out in DMSO at 100 degrees C, the polymerhaving the highest molecular weight (M(n)=20000) was obtained. Various NBD polyamides were also prepared by the reaction of NDC with certain diisocyanates under similar conditions.

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Documento generato il 02/12/20 alle ore 15:21:15