Ferrocene-containing polymers. I. Radiation-induced polymerization of ferrocenylmethyl methacrylate

Autor: Togoro Matsuo, Kunio Araki, Takashi Fujimura, Takashi Sasaki, Kyoji Tsubakiyama, Kenzo Yoshida
Rok vydání: 1979
Předmět:
Zdroj: Journal of Polymer Science: Polymer Chemistry Edition. 17:173-184
ISSN: 1542-9369
0360-6376
DOI: 10.1002/pol.1979.170170117
Popis: γ-Ray-induced polymerizations of ferrocenylmethyl methacrylate (FMMA) in crystalline and amorphous states were investigated with kinetical and ESR methods. In the crystalline state the polymerization of FMMA proceeded slowly and gave low-molecular-weight polymers, whereas in the amorphous state it proceeded rapidly and gave polymers of much higher molecular weight. Molecular weight distributions of these polymers were binodal. The temperature dependence and the dose-rate dependence of the polymerization rates were different between the two states. Wide-line nuclear magnetic resonance (NMR) spectra of the amorphous monomer suggested that the polymerization proceeded in a supercooled state. Electron spin resonance (ESR) spectra of γ-irradiated FMMA and 1,1′-ferrocenyl-di(methyl methacrylate) showed that ferrocene radicals and methacrylic radicals were formed simultaneously at low temperature; with increasing temperature the former radicals disappeared, whereas the latter changed into growing chain radicals. The yields of radicals were relatively low; this means that ferrocene groups in the monomers behave as a radiation energy absorber.
Databáze: OpenAIRE
Externí odkaz: