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The polymerization and copolymerization of nitroalkyl acrylates and nitroalkyl methacrylates
Author(s) -
Takahashi Kunihiro,
Abe Satsuki,
Namba Keiho
Publication year - 1968
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1968.070120717
Subject(s) - copolymer , polymer chemistry , monomer , methacrylate , polymerization , methyl methacrylate , chemistry , azobisisobutyronitrile , nitro , styrene , polymer , materials science , organic chemistry , alkyl
Nitroalkyl acrylates and methacrylates involving some new compounds were prepared. The homopolymerization of these monomers in toluene and their copolymerization with styrene in acetone were carried out with azobisisobutyronitrile as initiator. The rate of polymerization of the nitroalkyl acrylates showed a correlation with the number of nitro groups situated on the ester side chain. The apparent activation energies of the polymerization were found to be 22.0–27.5 kcal./mole for the nitroalkyl acrylates and about 11.5–13.0 kcal./mole for the nitroalkyl methacrylates. From the reactivity ratios and Q‐e values of the copolymerization the following information was obtained. The copolymerization behavior of nitroalkyl acrylates and methacrylates showed an alternating tendency, and these monomers belong to the conjugative monomer groups. On the reactivities of these monomers, the polarity of vinyl group was affected a little by nitro group of ester bond side, and the resonance affected little. These monomers were crosslinked with 2‐methyl‐2‐nitro‐1,3‐propylene diacrylate. Some of the polymers showed marked improvement in the physical properties of elastomers.