Effect of silicon, germanium and tin compounds on copolymerization of unsaturated acids

A study was made of the effect of silicon, germanium and tin compounds on copolymerization of methacrylic and acrylic acids with vinyl monomers. It was established that chlorides and trisubstituted hydrides of silicon, germanium and tin result in a reduction of the content of acid units in the copol...

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Bibliographic Details
Published in:Polymer science USSR 1980, Vol.22 (9), p.2345-2351
Main Authors: Smirnova, L.A., Knyazeva, T.Ye, Semchikov, Yu.D., Modeva, Sh.I., Yegorochkin, A.N., Kalinina, G.S., Lyutin, Ye.G.
Format: Article
Language:English
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Summary:A study was made of the effect of silicon, germanium and tin compounds on copolymerization of methacrylic and acrylic acids with vinyl monomers. It was established that chlorides and trisubstituted hydrides of silicon, germanium and tin result in a reduction of the content of acid units in the copolymer, the effect markedly depending on the type of substituent and the main element of the modifier of the system. A distinctive feature of new modifiers is the action on copolymerization in catalytic amounts not exceeding 1% in the monomer mixture. It was shown that charge transfer complexes are formed between unsaturated acids and compounds of elements of group IVB. An assumption was put forward that the variation in copolymer composition is the consequence of interaction of the modifier with the intermediate complex, as a result of which the level of resonance stabilization is lowered.
ISSN:0032-3950
1878-268X
DOI:10.1016/0032-3950(80)90103-3