Graft Copolymerization of Glass Fiber and Its Application

Abstract

SynopsisModified glass fibers, containing unsaturated hydrocarbon surface groups, were prepared by a hydrothermal treatment, with allylglycidylether in excess as reagent. Graft polymerization of the treated glass fiber with styrene and methylmethacrylate was carried out in sealed tubes, under nitrogen, using benzoyl peroxide (BPO) and cumene hydroperoxide (CHPO) as initiators. When BPO was used as the initiator, the grafting efficiency was extremely low, but the graft copolymerization behavior was similar to tbat of usual organic polymers. With CHPO, both grafting ratio and grafting efficiency were very high. Various properties of composite materials containing grafted glass cloth were studied. Flexural strength, flexural modulus, and interlaminar shear strength increased proportionally to the increase of the grafting ratio; the same values were decreased only in a small extent after the boiling test.

Photochemical Attachment of Polymer Films to Solid Surfaces via Monolayers of Benzophenone Derivatives

“…Altogether, the thicknesses that can be realized with this type of chemistry are of the same order or even higher as for other “grafting-to” techniques. − The advantage of this photochemical route to covalently attached polymer films clearly is the simplicity of the silane synthesis and the versatility with regard to the polymers that can be used for attachment. If, however, thicker films are to be prepared, one has to use a different approach where the polymers are formed in situ on the surface by means of monolayers of initiators (“grafting-from” technique). − …”

“…The covalent attachment of ultrathin films of polymers to a solid substrate is often desirable to enhance the stability of the films against solvents and displacement reagents (e.g., water for hydrophilic surfaces). As a consequence of this need, numerous grafting protocols have been developed. − The most common procedures use polymers that carry functional groups at one or both chain ends or as pendent side groups that are suitable for binding to the surface. All these strategies, however, sometimes require extensive synthetic efforts as the preparation of functionalized polymers is not an easy task.…”

Photochemical attachment of polyelectrolyte membrane to electrode substrate and their humidity-sensitive properties

“…As a consequence of this need, numerous organic/inorganic hybrid protocols have been developed [27][28][29][30]. The most common procedures use silanecoupling agents that are suitable for binding to the inorganic surface and organic polymer.…”