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Titolo:
SYNTHESIS AND PROPERTIES OF THE AROMATIC POLYAMIDES CONTAINING THE 2,4'-BIPHENYLDIYL STRUCTURE
Autore:
AKUTSU F; SUGIYAMA N; ANDO N; KASASHIMA Y; INOKI M; NARUCHI K;
Indirizzi:
CHIBA UNIV,FAC ENGN,DEPT APPL CHEM,INAGE KU,YAYOI CHO 1-33 CHIBA 263 JAPAN
Titolo Testata:
Polymer Journal
fascicolo: 10, volume: 27, anno: 1995,
pagine: 1025 - 1032
SICI:
0032-3896(1995)27:10<1025:SAPOTA>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Soggetto:
ALPHA-DIKETONE MOIETIES; MAIN CHAIN; DIACID CHLORIDES; UNITS; DIAMINES;
Keywords:
2,4'-BIPHENYLDIAMINE; AROMATIC POLYAMIDE; SOLUBILITY; THERMAL PROPERTY; 5-BROMO-2,4'-BIPHENYLDIAMINE; N'-BIS(TRIMETHYLSILYL)5-BROMO-2,4'-BIPHENYLDIAMINE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
24
Recensione:
Indirizzi per estratti:
Citazione:
F. Akutsu et al., "SYNTHESIS AND PROPERTIES OF THE AROMATIC POLYAMIDES CONTAINING THE 2,4'-BIPHENYLDIYL STRUCTURE", Polymer Journal, 27(10), 1995, pp. 1025-1032

Abstract

Novel aromatic polyamides were synthesized from 2,4'-biphenyldiamine by low-temperature solution polycondensation. The polyamides were soluble in pyridine, m-cresol, N,N-dimethylacetamide, 1-methyl-2-pyrrolidone, hexamethylphosphoric triamide, N,N-dimethyl-formamide, dimethylsulfoxide, and cone. H2SO4. The glass-transition temperatures (T(g)s) were found in the 248-284 degrees C range. The temperatures at 5% weight loss in nitrogen atmosphere (T(d)s) were 435-459 degrees C, and residual weights at 600 degrees C were 43-56%. The introduction of 2,4'-biphenyldiyl structure to the backbones of aromatic polyamides improves solubility without lowering high thermal stability. In addition, brominated aromatic polyamides were synthesized from -bis(trimethylsilyl)-5-bromo-2,4'-biphenyldiamine, and their properties were compared with those of none-brominated polyamides. The brominated aromatic polyamides indicated higher solubility, though their T(g)s were as high as those of none-brominated polyamides. As concerns thermal decomposition behavior, the introduction of a bromo-group to the structures of aromatic polyamides lowered T(d)s, but heightened residual weight.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 21/01/21 alle ore 04:16:43