论文信息 - Silicone Rubbers. Ix. Contributions to Polydimethylsiloxane-α,ω-Diols Synthesis by Heterogeneous Catalysis

Silicone Rubbers. Ix. Contributions to Polydimethylsiloxane-α,ω-Diols Synthesis by Heterogeneous Catalysis

Abstract The cationic polymerization of a cyclosiloxane mixture (hexamethyl-cyclotrisiloxane-D3, octamethylcyclotetrasiloxane-D4, decamethylcyclopentasiloxane-D5, dodecamethylcyclohexasiloxane-D6 and tetradecamethylcycloheptasiloxane-D7) in the presence of water as adjusting-control agent for molecular weight is studied in heterogeneous catalyst system using an ion-exchange VIONIT CS-34C with sulphonic groups. Thus poly(dimethylsiloxane)-α,ω-diols for room temperature vulcanization (RTV) silicone rubbers, were obtained.

Mihai Marcu | Maria Cazacu | M. Cazacu | M. Marcu

[1] A. V. Bogatskii,et al. Zh. Obshch. Khim. , 1975 .

[2] G. Meyerhoff,et al. Hydrodynamisches verhalten gelöster polydimethylsiloxane , 1962 .

[3] W. Grubb,et al. The Mechanism of the Acid- and Base-catalyzed Equilibration of Siloxanes , 1954 .

[4] G. E. Kellum,et al. Rapid condensation procedure for determination of hydroxyl in silicone materials , 1967 .

[5] D. W. Scott. Equilibria between Linear and Cyclic Polymers in Methylpolysiloxanes , 1946 .

[6] M. Voronkov,et al. The siloxane bond : physical properties and chemical transformations , 1978 .