Some Properties of New Ion Exchangers with Organopolysiloxane Structure

Chen, Fengming; Cote, Gérard; Bauer, D.

doi:10.1007/978-94-009-0777-5_27

Recent Developments in Ion Exchange 1990

DOI: 10.1007/978-94-009-0777-5_27

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Some Properties of New Ion Exchangers with Organopolysiloxane Structure

Fengming Chen

Gérard Cote

D. Bauer

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1993

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Synthesis of polysiloxanes with electron‐donating groups by anionic ring‐opening polymerization

Chojnowski¹,

Rózga²,

Fortuniak³

et al. 1993

Makromolekulare Chemie. Macromolecular Symposia

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Anionic kinetically controlled ring opening polymerization of cyclotrisiloxane is explored as a method of synthesis of copolymers having the chain composed of dimethylsiloxane units and siloxane units bearing an uncharged nucleophilic (electron‐donating, ED) group. Model monomers for these studies are derived from hexamethylcyclotrisiloxane (D3) in which one methyl group is replaced by the organophosphorus group of general formula ‐ (CH2) nP(X)Ph2 where X is lone pair, O or S. This method is shown to give significant advantages over the thermodynamically controlled homopolymerization and copolymerization of nucleophile‐substituted cyclosiloxanes which have so far been used for synthesis of ED substituted siloxane copolymers. The yield of the copolymers is much higher and the molecular weight distribution is narrow. The arrangement of the ED substituents along the chain, although not purely uniform, is much more regular as compared with the statistical distribution. The content of cyclic oligomers was higher than in the polymerization of unsubstituted D3, which is rationalized on the basis of intramolecular interaction of the counter‐ion with the ED groups.

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Synthesis of polysiloxanes with electron‐donating groups by anionic ring‐opening polymerization

Chojnowski¹,

Rózga²,

Fortuniak³

et al. 1993

Makromolekulare Chemie. Macromolecular Symposia

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show abstract

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Some Properties of New Ion Exchangers with Organopolysiloxane Structure

Cited by 1 publication

References 14 publications

Synthesis of polysiloxanes with electron‐donating groups by anionic ring‐opening polymerization

Synthesis of polysiloxanes with electron‐donating groups by anionic ring‐opening polymerization

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