HYDROXYBUTENYLCELLULOSE AND ITS DERIVATIV ES

Synthesis of hydroxybutenyl ethers of cellulose with different degrees of substitution was effected by O-alkylation of alkaline cellulose in a medium of nonpolar solvents with low dielectric permeability in the presence of additions of phenol-type compounds. Conditions for effect ive use of the O-alkylating agent -1,2-epoxybut-3-ene were specified. Their acetates were produced by acetylation of high-substituted sample s of hydroxybutenyl cellulose (HBC) in Verley reactive; bromination of HBC and its acetates, that may be efficiently performed in CHCl3, was used to synthesize the corresponding bromine derivatives. The DTA met hod was applied to study thermooxidation decomposition of new cellulos e derivatives. Correlation of efficiency of the flame retarding action of polymer antipyrene with the quantity of bromine introduced into th e material is determined by the possibility of brominating acetyl grou ps of HBC acetates, as a consequence of keto-enole tautomery, which wa s confirmed by IR-spectroscopic data. Introduction of volumetric hydro xybutenyl radical into the cellulose structure results in material amo rphicization and makes it processable from its thermoplastic state. Ac etylation of the OH-groups in HBC leads to breaking of the hydrogen bo nds and to further decrease of the processing temperature.