vinyl acetate
vinyl acetate
vi′nyl ac′etate
n.
单词 | vinyl acetate |
释义 | vinyl acetatevinyl acetatevi′nyl ac′etaten. Vinyl Acetatevinyl acetate[′vīn·əl ′as·ə‚tāt]Vinyl Acetatea vinyl ester of acetic acid (CH2=CHOCOCH3), a colorless liquid with a weak lachrymatory effect. Boiling point, 73° C; melting point, -84° C; density at 20° C, 0.934 g/cm3. It has limited solubility in water (2.5 percent) but is readily soluble in organic solvents. It polymerizes and copolymerizes readily with other vinyl compounds. Vinyl acetate is made by vinylation of acetic acid with acetylene in the presence of catalysts: CH≡CH+HOCOCH3→CH2=CH—OCOCh3 Polymers and copolymers of vinyl acetate are widely used for making glues and lacquers, for impregnation, and for making floor tiles and phonograph records. Polyvinyl acetate, a product of the polymerization of vinyl acetate, is used as a raw material for making polyvinyl alcohol. |
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