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Surface of natural rubber was modified by radiation-induced grafting of 2-hydroxyethyl methacrylate (HEMA) to improve the properties of surface hardness, dry friction, wiping performance, and wear duration. The composition ration of HEMA to rubber was controlled from 0.29 to 0.93 by changing HEMA concentration and dose in graft polymerization. When this composition ration was higher than 0.7, the surface hardness was higher than 64 and the coefficient of dry friction lower than 0.65. Those values became better than those of commercially available chlorinated-rubber in terms of wear and friction against glass. The resulting wear resistance was 10 times higher than chlorinated rubber. However, the surface hardness in wet state was 62.5 since grafted-HEMA gave the hydrophilicity to the rubber. As a result, the grafted-HEMA rubber realized 95% and higher wiping performance of water on glass.

Journal Articles

Surface modification of vulcanized rubber by radiation co-grafting

Mizote, Norihito*; Saito, Hiroaki*; Ueki, Yuji; Seko, Noriaki; Tamada, Masao

JAEA-Review 2011-043, JAEA Takasaki Annual Report 2010, P. 52, 2012/01

https://jopss.jaea.go.jp/pdfdata/JAEA-Review-2011-043.pdf

no abstracts in English

Journal Articles

Surface modification of vulcanized rubber by radiation co-grafting

Mizote, Norihito*; Katakai, Akio*; Tamada, Masao

JAEA-Review 2010-065, JAEA Takasaki Annual Report 2009, P. 47, 2011/01

https://jopss.jaea.go.jp/pdfdata/JAEA-Review-2010-065.pdf

no abstracts in English

Journal Articles

Surface modification of vulcanized rubber by radiation grafting, 1; Improvement in friction behavior

Mizote, Norihito*; Katakai, Akio; Tamada, Masao; Matsuoka, Hiroshige*

Journal of Applied Polymer Science, 117(5), p.2825 - 2830, 2010/09

Hydrophilic monomer, 2-hydroxyethyl methacrylate (HEMA), and hydrophobic monomer, 3-(methacryloyloxy)propyltris(trimethylsiloxy)silane (MPTS), were grafted on vulcanized rubber surface by simultaneous electron beam irradiation. We studied the characteristics of graft polymerization, the relationship between the contact angle of water on the modified surface and friction behavior at the moment of semi-dry. Grafted rubbers were investigated with composition ratio and contact angle. As a result of graft polymerization of HEMA and MPTS, the composition ratio increased as the monomer concentration and the irradiation dose increased. By the graft polymerization of HEMA, the contact angle decreased to approximately 70 $^{circ}$ . By the graft polymerization of MPTS, the contact angle increased approximately to 108 $^{circ}$ . Friction behavior at the moment of semi-dry was evaluated by which is difference with the coefficient of dry friction and maximum friction. The increase in the contact angle owing to hydrophobic properties by graft polymerization of MPTS led to the decrease of . The decrease in the contact angle owing to hydrophilic properties by graft polymerization of HEMA resulted in the increase of .

no abstracts in English

Oral presentation

Surface modification of vulcanized rubber by radiation-induced co-grafting using electron beam

Saito, Hiroaki*; Mizote, Norihito*; Ueki, Yuji; Seko, Noriaki

no journal, ,

no abstracts in English

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The Influence on the vulcanized rubber physical properties by radiation grafting

Surface modification of vulcanized rubber by radiation grafting

Surface modification of vulcanized rubber by radiation grafting, 2; Improvement in performance of wiper rubber

Surface modification of vulcanized rubber by radiation co-grafting

Surface modification of vulcanized rubber by radiation co-grafting

Surface modification of vulcanized rubber by radiation grafting, 1; Improvement in friction behavior

Friction control on vulcanized rubber surface by means of radiation grafting

Improvement of hydrophility of vulcanized rubber surface by radiation grafting

Friction control on vulcanized rubber surface by means of radiation grafting

Improvement of hydrophility of vulcanized rubber surface by radiation grafting

Improvement of hydrophility of vulcanized rubber surface by radiation grafting

Surface modification of vulcanised rubber by electron beam irradiation grafting and its application

Surface modification of vulcanised rubber by electron beam irradiation grafting and its industrial application

Surface modification of vulcanised rubber by electron beam grafting and its industrial application

Surface modification of vulcanized rubber by radiation grafting

Surface modification of vulcanized rubber by radiation-induced co-grafting using electron beam

Surface modification of vulcanized rubber by radiation-induced co-grafting using electron beam