Synthesis and characterization of amphiphilic branched silica derivatives associated with oligomeric medium

• Published in: RSC advances Vol. 9; no. 37; pp. 21233 - 21242
• Main Authors: Davletbaev, R. S, Zaripov, I. I, Faizulina, Z. Z, Davletbaeva, I. M, Domrachova, D. S, Gumerov, A. M
• Format: Journal Article
• Language: English
• Published: England Royal Society of Chemistry 09-07-2019; The Royal Society of Chemistry
• Subjects: Block copolymers; Chemistry; Derivatives; Low molecular weights; Polydimethylsiloxane; Polymer films; Polyoxyethylene; Potassium; Propylene; Silicon dioxide; Tetraethyl orthosilicate; Toluene; Toluene diisocyanates
• ISSN: 2046-2069; 2046-2069
• DOI: 10.1039/c9ra03683k

Amphiphilic branched silica derivatives associated with oligomeric medium (ASiP) were obtained using tetraethoxysilane, polyoxyethylene glycol and low molecular weight polydimethylsiloxane. The creation of a silica core was based on tetraethoxysilane hydrolysis and condensation reactions by using water and a potassium diethylene glycolate as the catalyst. These reactions proceeded with the sequential participation of polyoxyethylene glycol and polydimethylsiloxane in parallel transetherification reactions. Microporous polymer film based on 2,4-toluene diisocyanate and block copolymers of propylene and ethylene oxides with terminal potassium-alcoholate groups were modified by ASiP. It has been shown that ASiP at the phase interface between thermodynamically incompatible macrochains performs the function of a link. It leads to a significant increase of intermolecular interactions and the supramolecular organization of the modified microporous polymers.
The scheme of ASiP formation.