Grafting of styrene onto carbon fiber having perester groups

Yosomiya, Ryûtoku; Fujisawa, Takao

doi:10.1007/bf00264234

Polymer Bulletin

1985

DOI: 10.1007/bf00264234

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Grafting of styrene onto carbon fiber having perester groups

Ryûtoku Yosomiya

Takao Fujisawa

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1986

2006

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Cited by 12 publications

(2 citation statements)

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“…It has been reported the polymerization of vinyl monomers is initiated by polymer having peroxyester groups, introduced by the reaction of acyl chloride groups of the polymer with tert-butyl hydroperoxide, to give graft copolymer. 7 -9 Furthermore, the grafting of vinyl polymers onto carbon fiber by use of peroxyester groups on the fiber was report-ed_ 10 In the present paper, the radical graft polymerization of various kinds of vinyl monomers, such as MMA and styrene, from carbon black initiated by peroxyester groups introduced onto the surface was investigated (eq 1).…”

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Radical Grafting from Carbon Black. Graft Polymerization of Vinyl Monomers Initiated by Peroxyester Groups Introduced onto Carbon Black Surface

Tsubokawa

Fujiki

Sone

1988

Polym J

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Carbon blacks having tert-butyl peroxyester groups (1, 2, and 3) were prepared by the reaction of acyl chloride CB-COO -t-Bu II 0 CB-O-C(CH2) 4 ~-OO-t-Bu 0 2 yH3 CB-y-(CH2)i-~-OO-t-Bu CN 0 3 groups on carbon black with tert-butyl hydroperoxide. The introduction of acyl chloride groups onto carbon black was achieved by three methods: (I) reaction of a carboxyl group with thionyl chloride, (2) reaction of a phenolic hydroxyl group with adipoyl chloride, and (3) reaction of thionyl chloride with a carboxyl group introduced by the treatment of aromatic ring of carbon black with 4,4'-azobis(4-cyanovaleric acid). Carbon black 1 has no ability to initiate the graft polymerization of methyl methacrylate (MMA) because phenyl radical formed on the carbon black by decomposition of the peroxyester groups inhibited the polymerization. On the contrary, carbon blacks 2 and 3 were able to initiate the graft polymerization of MMA at 70-90°C and PMMA was effectively grafted onto the surface based on the propagation of the polymer from the alkyl radicals formed on the surface. The percentage of grafting of PMMA at 70°C by use of 3 as initiator increased to about 80% with progress of polymerization. Furthermore, the graft polymerization of several vinyl monomers initiated by 3 was investigated. KEY WORDS Carbon Black / Graft Polymerization / Polymer-Grafted Carbon Black / Peroxyester Groups / 4,4'-Azobis(4-cyanovaleric acid) / Methyl Methacrylate / tert-Butyl Hydroperoxide / 214 CB-R-fCH 2-CH1 CH 2-CH I n-I

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confidence: 90%

Radical Grafting from Carbon Black. Graft Polymerization of Vinyl Monomers Initiated by Peroxyester Groups Introduced onto Carbon Black Surface

Tsubokawa

Fujiki

Sone

1988

Polym J

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“…16 Furthermore, we demonstrated that the radical graft polymerization of vinyl monomers is initiated from surface radicals formed on carbon fiber. 17 We have also reported the radical graft polymerization of vinyl monomers initiated by the system consisting of Mo(CO) 6 and trichloroacetylchloride group on carbon fiber. 18 On the other hand, we have reported the grafting of polymers by ligand-exchange reaction of ferrocene moieties of polymers with polycondensed aromatic rings of carbon black, carbon fiber, and carbon nanofibers.…”

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confidence: 92%

Grafting of Polymers onto Carbon Microcoil Surface by Ligand-Exchange Reaction of Ferrocene Moieties of Polymer with Polycondensed Aromatic Rings of the Surface

Morohashi

Nishida

Takahashi

et al. 2006

Polym J

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ABSTRACT:To improve the dispersibility of carbon microcoil (CMC) in solvents and polymer matrices, the grafting of copolymer containing vinyl ferrocene (VFE) onto surface by ligand-exchange reaction with ferrocene moieties of the copolymer and polycondensed aromatic rings of CMC was investigated. The copolymer containing VFE was prepared by the radical copolymerization of VFE with vinyl monomers, such as methyl methacrylate (MMA) and styrene (St), using 2,2 0 -azobisisobutyronitrole as an initiator. It was found that by heating of CMC with poly(VFE-co-MMA) and poly(VTE-co-St) in the presence of AlCl 3 and Al powder as catalyst, these copolymers were grafted onto the surface: the percentage of grafting reached to 64.2%. On the contrary, in the absence of AlCl 3 , no grafting of the copolymer was observed. The grafting of polymers onto the CMC surface was confirmed by attenuated total reflection Fourier transform infrared (ATR-FTIR), thermal decomposition gas chromatography-mass spectroscopy (GC-MS) and fieldemission scanning electron microscope (FE-SEM). Therefore, it is considered that the copolymer was grafted onto CMC surface by ligand-exchange reaction with ferrocene moieties of the copolymer and polycondensed aromatic rings of CMC. The polymer-grafted CMC gave a stable dispersion in solvents for grafted polymer.

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Electrical properties of polypyrrole‐polymer composite films

Yosomiya

Hirata

Haga

et al. 1986

Makromol. Chem., Rapid Commun.

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Grafting of styrene onto carbon fiber having perester groups

Cited by 12 publications

References 5 publications

Radical Grafting from Carbon Black. Graft Polymerization of Vinyl Monomers Initiated by Peroxyester Groups Introduced onto Carbon Black Surface

Radical Grafting from Carbon Black. Graft Polymerization of Vinyl Monomers Initiated by Peroxyester Groups Introduced onto Carbon Black Surface

Grafting of Polymers onto Carbon Microcoil Surface by Ligand-Exchange Reaction of Ferrocene Moieties of Polymer with Polycondensed Aromatic Rings of the Surface

Electrical properties of polypyrrole‐polymer composite films

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