FRIEDEL-CRAFTS REACTION OF VINYLTRIMETHOXYSILANE WITH STYRENE AND COMPOSITE MATERIALS ON THEIR BASE

Author: Shota Chikhladze
Keywords: trimethoxy(4-vinylphenethyl)silane, alkylation reaction, FTIR and NMR spectroscopy
Annotation:

The Friedel-Crafts reactions of styrene and vinyltrimethoxysilane were studied and the corresponding alky¬la¬ted product trimethoxy(vinylphenethyl) silane was obtained. The composition and structure of the syn¬the¬sized product are determined by determining the molecular mass and molecular refraction using FTIR, 1H, 13C, hetero Cozy and 29Si NMR spectra. Based on the data in the literature, and spectra we think that the Friedel-Crafts reaction proceeds with obtaining of a mixture of ortho- and para-addition isomeric products. It is difficult to assign NMR spectrum signals to para- or ortho-addition products. Since there is an overlap between these signals. NMR spectra have been studied by us with various programs: ChemBioDraw Ultra, Mestre Nova and 1H NMR spectrum simulation study methods, which have been used to confirm signal overlap. By “in situ” polymerization of trimethoxysilylated styrene in the presence of dicumyl peroxide in the filler pine sawdust, composite materials were prepared by the hot pressing method. The mass ratio of trime¬tho¬xy¬lated styrene and sawdust was 5:95, at different temperatures, and obtained from environmentally safe wood polymer composites Physical-mechanical properties of composites are studied. It has been established that the water absorption of composites decreases with increasing pressing temperature of the composite and the bending hardness and the value of impact viscosity rise.