Synthesis of POSS−Methyl Methacrylate-Based Cross-Linked Hybrid Materials

Abstract

A series of POSS (PEG)n)2-6 macromonomers were further functionalized by reaction with methacryloyl chloride and then polymerized with methyl methacrylate to produce a series of hybrid materials where the amounts of POSS (PEG)n)2-6 used as cross-linkers varied from 0.1 to 0.5 mol %. Thermal investigations using TGA and DSC techniques revealed that both POSS concentrations and PEG chain length play important roles in defining structure-property relationships. Incorporation of POSS always increased thermal stability. Although the POSS is a bulky and multifunctional cross-linker, glass transitions did not always increase. In some instances bulkiness of the group created free volume and chain separation, which led to a reduction in the glass transition temperature.

Advanced Silicon Chemistry in Australia: Forming Strong Links with Asia

“…[51] These cross-linkers were then combinedw ith methyl methacrylate monomer and crosslinked with benzoyl peroxide initiator to produce as eries of hybrid materials (see Scheme12).…”

Synthesis and physicochemical characterization of silicafillers modified with octakis({3-methacryloxypropyl}dimethylsiloxy) octasilsesquioxane

“…Thanks to a diversity of substituents, POSS make unique structures which usually appear as a result of hydrolysis and condensation reactions of trialkoxy-or trichlorosilanes 1-4 . As a single cubic structure (T 8 ) can accept as many as 8 groups, the compounds solubility, catalytic activity or adhesive properties can improve…”

Synthesis of New Polyfunctional Cage Oligosilsesquioxanes and Cyclic Siloxanes by Thiol-ene Addition

“…They may serve as cores for the generation of star branched, hyperbranched and dendritic branched polymers [1][2][3] and may be used for the cross-linking of linear polymers to produce various polymer networks [4][5][6][7]. They may also be important precursors in sol-gel technology for the generation of various porous and bulk materials [8][9][10][11].…”