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Synthesis and Characterization of Bis(methoxyl Hydroxyl)-functionalized Disiloxane and Polysiloxane Oligomers Derivatives Therefrom by Xiaoli Zhu; Meng Zhang; Qingsi Zhang; Shengyu Feng; Xiang Z. Kong is a Materials Science article available to read on EtoBox.

What is Synthesis and Characterization of Bis(methoxyl Hydroxyl)-functionalized Disiloxane and Polysiloxane Oligomers Derivatives Therefrom about?

With purpose to prepare waterborne polyurethane with improved performance, bis(methyoxyl hydroxyl)-functionalized polysiloxanes with different dimethylsiloxane segment length were prepared. The preparation includes three steps, the first is synthesis of 1,3-bis(glycidoxypropyl)tetramethyldisiloxane (compound I) via hydrosilylation of allylglycidyl ether with tetramethyldisiloxane, followed by a subsequent methoxylation of the resultant compound from the hydrosilylation to give 1,3-bis(3-(1-methoxy-2-hydroxypropoxy)propyl)tetramethyldisiloxane (compound II). Using this compound II and octamethylcyclotetrasiloxane (D 4 ), an equilibrium reaction was carried out to obtain the target Product III, i.e. bis(methoxyl hydroxyl)-functionalized polysiloxanes. The ratio of D 4 /compound II was varied in order to prepare product III with different segment length consisting of dimethylsiloxane units. At each step, the outcome compounds were characterized through Infrared, 1 H NMR, 13 C NMR as well as H-H and H-C Correlated Spectroscopy (COSY). The results showed that each step was successfully carried out and objective products were achieved. It was estimated that compound II was not exclusive

Who reads Synthesis and Characterization of Bis(methoxyl Hydroxyl)-functionalized Disiloxane and Polysiloxane Oligomers Derivatives Therefrom?

Author

Xiaoli Zhu; Meng Zhang; Qingsi Zhang; Shengyu Feng; Xiang Z. Kong

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0014-3057)

Published

2005

Language

EN

Field

Materials Science (Physical Sciences)