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Titolo:
STEREOSPECIFIC POLYMERIZATION OF N,N-DIPHENYLACRYLAMIDE
Autore:
SHIOHARA K; HABAUE S; OKAMOTO Y;
Indirizzi:
NAGOYA UNIV,SCH ENGN,DEPT APPL CHEM NAGOYA AICHI 464 JAPAN NAGOYA UNIV,SCH ENGN,DEPT APPL CHEM NAGOYA AICHI 464 JAPAN
Titolo Testata:
Polymer Journal
fascicolo: 8, volume: 28, anno: 1996,
pagine: 682 - 685
SICI:
0032-3896(1996)28:8<682:SPON>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
ASYMMETRIC POLYMERIZATION; N,N-DISUBSTITUTED ACRYLAMIDES;
Keywords:
STEREOSPECIFIC POLYMERIZATION; ANIONIC POLYMERIZATION; N,N-DIPHENYLACRYLAMIDE; TACTICITY; RACEMIZATION; POLY(METHYL ACRYLATE);
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
14
Recensione:
Indirizzi per estratti:
Citazione:
K. Shiohara et al., "STEREOSPECIFIC POLYMERIZATION OF N,N-DIPHENYLACRYLAMIDE", Polymer Journal, 28(8), 1996, pp. 682-685

Abstract

N,N-Diphenylacrylamide (DPAA) was polymerized with anionic and radical initiators in toluene and tetrahydrofuran. The tacticity of the obtained polymers (poly(DPAA)) was unable to be determined directly by NMRspectroscopy. Therefore, poly(DPAA) was carefully converted to poly(acrylic acid) by solvolysis in a mixture of concentrated sulfuric acid and methanol (60:40; by volume) at 90 degrees C for 24 hours, followedby methylation with diazomethane. Under suitable conditions, the transformation was performed without change (racemization) of tacticity ofthe polymers. Diad tacticity of the derived poly(methyl acrylate) wasdetermined by H-1 NMR spectroscopy. Anionic polymerization using butyllithium in toluene afforded a polymer rich in meso diad (m=0.95), andthat in tetrahydrofuran racemo diad (r=0.66). Radical polymerization in toluene afforded a polymer with the highest raceme diad content (r=0.85).

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/12/20 alle ore 19:36:22