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Titolo:
GROUP SELECTIVE LINEAR POLYMERIZATION OF VINYL ACRYLATE USING 9-BORABICYCLO[3.3.1]NONANE
Autore:
KANNO S; SYOUJI Y; HOSOI M; SATO R; TAKEISHI M;
Indirizzi:
YAMAGATA UNIV,DEPT MAT SCI & ENGN YONEZAWA YAMAGATA 992 JAPAN YAMAGATA UNIV,DEPT MAT SCI & ENGN YONEZAWA YAMAGATA 992 JAPAN
Titolo Testata:
Polymer international
fascicolo: 4, volume: 42, anno: 1997,
pagine: 367 - 372
SICI:
0959-8103(1997)42:4<367:GSLPOV>2.0.ZU;2-5
Fonte:
ISI
Lingua:
ENG
Keywords:
VINYL ACRYLATE; 9-BORABICYCLO[3.3.1]NONANE; POLYMERIZATION; MICHAEL-TYPE ADDITION; LINEAR POLYMER;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
34
Recensione:
Indirizzi per estratti:
Citazione:
S. Kanno et al., "GROUP SELECTIVE LINEAR POLYMERIZATION OF VINYL ACRYLATE USING 9-BORABICYCLO[3.3.1]NONANE", Polymer international, 42(4), 1997, pp. 367-372

Abstract

Vinyl acrylate (VA) was polymerized with 9-borabicyclo[3.3.1]nonane (9-BBN) in tetrahydrofuran under argon at low temperatures (to -60 degrees C). Hydroquinone and 2,6-di-tert-butyl-p-cresol had little effect on the polymerization. Addition of tetrachloromethane as a radical chain transfer agent did not lead to decrease in molecular weight of the polymer obtained. The initial rate of polymerization was proportional to [9-BBN](0.91) and [VA](1.37). The experimental results were indicative of non-radical properties of the propagating chain end. The polymer was soluble in organic solvents such as toluene, chloroform and N,N-dimethylformamide. The nuclear magnetic resonance measurements showed the presence of pendant vinyl groups in the polymer, indicating that only the acrylic double bond of VA reacted for polymerization to yield a linear polymer. Aniline retarded the polymerization and no polymer was formed in the presence of triethylamine. These inhibitory effects were explained on the basis of complex formation of 9-BBN with amines. This polymerization is discussed in terms of a non-radical mechanism.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/11/20 alle ore 15:50:12