Radiation‐induced grafting of methacrylic acid onto polyurethane in the presence of solvents

Omichi, Hideki; Stannett, V.

doi:10.1002/app.1985.070300727

Cited by 10 publications

(1 citation statement)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The styrene/dichloromethane mixture recorded a higher degree of swelling than the styrene/benzene or styrene/methanol mixtures. It has been established that the amount of sorption of a liquid is closely related to the difference in the solubility parameter between the polymer and the liquid 19–21. The smaller the difference, the larger the film swelling.…”

Section: Resultsmentioning

confidence: 99%

Effect of solvents on radiation‐induced grafting of styrene onto fluorinated polymer films

Nasef

2001

Polymer International

View full text Add to dashboard Cite

The effect of solvents on radiation‐induced grafting of styrene onto commercial fluorinated polymer films such as poly(tetrafluoroethylene) (PTFE), poly(tetrafluoroethylene‐co‐hexafluoropropylene) (FEP) and poly(tetrafluoroethylene‐co‐perfluorovinyl ether) (PFA) was investigated by a simultaneous irradiation technique. Three solvents, ie methanol, benzene and dichloromethane, were used to dilute styrene under various irradiation doses, dose rates and monomer concentrations. The effect of addition of mineral and organic acids on the degree of grafting in the presence of the three solvents was also studied. The degree of grafting was found to be strongly dependent upon the type of solvent and composition of the monomer/solvent mixture. Dilution of styrene with dichloromethane in various grafting conditions was found to enhance dramatically the degree of grafting compared with other solvents, and the maximum degree of grafting was achieved at a monomer/solvent mixture having a composition of 60:40 (v/v). The formation of polystyrene grafts in the three fluorinated films was verified using FTIR spectrometry. © 2001 Society of Chemical Industry

show abstract

Section: Resultsmentioning

confidence: 99%

Effect of solvents on radiation‐induced grafting of styrene onto fluorinated polymer films

Nasef

2001

Polymer International

View full text Add to dashboard Cite

show abstract

Electrical and other properties of mutual radiation‐induced methacrylic acid grafted polyethylene films

Omichi

Chundury

Stannett

1986

J of Applied Polymer Sci

View full text Add to dashboard Cite

SynopsisThe radiation-induced grafting of methacrylic acid onto polyethylene films was applied to the synthesis of ion-exchange membranes. The grafting yield increased at first then decreased with the increase in the irradiation dose. The surface area, thickness, volume, and the water uptake of the grafted film increased linearly with the increase in grafting yield. The distribution pattern of carboxyl groups of graft chains in the direction of film thickness followed by EPMA line profiles of potassium which combined with carboxyl groups showed that a homogeneous distribution was not obtained until the grafting yield was more than 10%. When DC current was supplied to the membrane in NaOH solution, the reciprocal of the electric resistance increased with the increase in NaOH concentration. The specific electric resistance decreased exponentially with the increase in the content of ionic functional groups in the membrane. The steady state concentration of Na+ in catholyte and the current efficiency were ca. 15 and 20%, respectively.

show abstract

Synthesis and properties of acrylonitrile‐EPDM‐4‐chlorostyrene graft copolymer

Park

Lee

et al. 1992

J of Applied Polymer Sci

View full text Add to dashboard Cite

SYNOPSISGraft copolymerization of acrylonitrile (AN) and 4-chlorostyrene (4-Clst) onto ethylenepropylene-diene terpolymer ( EPDM ) was carried out using benzoyl peroxide as initiator.The effects of EPDM content, initiator concentration, solvent, mole ratio of 4-Clst to AN, reaction time, and reaction temperature on the graft copolymerization were examined. It was found that the light resistance, weatherability, and thermal stability of the acrylonitrile-EPDM-4-chlorostyrene graft copolymer were considerably better than those of acrylonitrilebutadiene-styrene copolymer. ma1 stability, and tensile properties of the graft copolymer were analyzed. EXPERIMENTAL MaterialsAcrylonitrile (Junsei Chemical) was purified by standard procedures. Benzoyl peroxide ( Hayashi Chemical) was recrystallized from methanol. Ethylene-propylene-diene terpolymer ( EPDM ) , having ethylidene norbornene as a termonomer ( Aldrich Chemical; ethylene/propylene = 50/50 by mol %, ML 50), was used as received. 4-Chlorostyrene (4-Clst) monomer was prepared by dehydration of 4-chlorophenylmethyl carbinol, as described previously." n-Hexane, dimetyl formamide (DMF) , acetone, toluene, cyclohexane, ethyl acetate, and tetrahydrofuran (THF) were distilled prior to use.

show abstract

Radiation‐induced grafting of methacrylic acid onto polyurethane in the presence of solvents

Cited by 10 publications

References 9 publications

Effect of solvents on radiation‐induced grafting of styrene onto fluorinated polymer films

Effect of solvents on radiation‐induced grafting of styrene onto fluorinated polymer films

Electrical and other properties of mutual radiation‐induced methacrylic acid grafted polyethylene films

Synthesis and properties of acrylonitrile‐EPDM‐4‐chlorostyrene graft copolymer

Contact Info

Product

Resources

About