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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:
-
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- 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