Autor: Marc Krakovyak, Yulii Ya. Gotlib, Elisaveta Anufrieva, S.S. Skorokhodov, Tatiana N. Nekrasova, Tatiana Ananieva
Rok vydání: 1981
Předmět:
Zdroj: Die Makromolekulare Chemie. 182:1009-1016
ISSN: 0025-116X
DOI: 10.1002/macp.1981.021820401
Popis: The relationships of free-radical copolymerization of mono- and bifunctional monomers were investigated taking as an example a model system of monomers: methyl methacrylate (MMA) and 9,10-dianthrylenedimethyl dimethacrylate (1). The copolymerization was carried out in toluene at 60°C at a 525: 1 mole ratio of MMA to 1, with AIBN as initiator. Chemical and luminescent methods for the quantitative determination of bridge bonds containing anthracene moieties in the polymer system and the method of their selective cleavage were developed. Experimental dependences of the concentration of monomers and single and double bonded monomeric units of 1 in the copolymers on the copolymerization time were established. It was found that during the copolymerization the activity of each monomer double bond and that of the pendent double bonds in the monomeric units of 1 in the copolymer are similar. It was shown that over a specific range of changes in the content of bridge bonds (the position of which depends on the length of the chains being crosslinked) the values of the intrinsic viscosity of the copolymer solutions increase cooperatively and gel fraction is formed subsequently.
Databáze: OpenAIRE
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