Poly(α-methylstyrene-b-styrene) by a cationic mechanism

Block copolymers of styrene and α‐methylstyrene were obtained by a cationic mechanism involving a single‐step addition in the m‐chloroperbenzoic acid/liquid sulfur dioxide system. This result was possible because of the difference in the reactivity of these monomers in the temperatures of −40°C, −60...

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Veröffentlicht in:	Journal of polymer science. Part A, Polymer chemistry Polymer chemistry, 1987-01, Vol.25 (1), p.353-363
Hauptverfasser:	De Souza Gomes, Ailton, Soares, Bluma Guenther
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Copolymerization Exact sciences and technology Organic polymers Physicochemistry of polymers Preparation, kinetics, thermodynamics, mechanism and catalysts
Online-Zugang:	Volltext
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Beschreibung
Zusammenfassung:	Block copolymers of styrene and α‐methylstyrene were obtained by a cationic mechanism involving a single‐step addition in the m‐chloroperbenzoic acid/liquid sulfur dioxide system. This result was possible because of the difference in the reactivity of these monomers in the temperatures of −40°C, −60°C, and −78°C. Under these temperature conditions α‐methylstyrene is more reactive than styrene. The composition of the block copolymers was determined by NMR and TGA analysis in fractionated samples.
ISSN:	0887-624X 1099-0518
DOI:	10.1002/pola.1987.080250131