Synthesis of N-vinylacetamide and preparation of some polymers and copolymers
Synthesis of N-vinylacetamide and preparation of some polymers and copolymers
复制标题
N-乙烯基乙酰胺的合成及一些聚合物和共聚物的制备
DOI：
10.1021/i300018a014
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发表时间：
1985
期刊：
影响因子：
--
通讯作者：
R. H. Summerville
中科院分区：
文献类型：
--
作者：
R. Stackman;R. H. Summerville
A novel synthetic procedure is described which appears to bean economically attractive route to/V-vinylacetamide (NVA), a monomer capable of yielding a water-soluble polymer of considerable commercial potential. Previously published procedures have been multistep syntheses which gave products requiring considerable purification to obtain monomer quality. The process described involves an initial interchange between acetamide and dimethyl acetal to yield an intermediate ether amide, N-(a-methoxyethylacetamide), which Is then pyrolyzed to give NVA in highyield and high purity. The same procedure was applied to the synthesis of/V-vinylproplonamide. Polymerization of the crude pyrolysate from the above route gave polymer with an inherent viscosity of 1.5 dL/g. Various polymerization conditions were evaluated for the homopolymerization. The homopolymer begins to decompose at 375 C without melting and could be solvent cast to clear brittle films. Hydrolysis of the homopolymer gave poly (vinylamine). Copolymerization of NVA with vinyl acetate (VA) resulted in copolymers which show a higher NVA content than the monomer mixture. Copolymers with as little as 25 mol% VA had melting points below 100 C.
