Radiation Induced Graft Copolymerization of Vinyl Acetate and Isopropenyl Acetate Onto Isotactic Polypropylene

1996 ◽  
Vol 61 (2) ◽  
pp. 259-267 ◽  
Author(s):  
Bhupendra N. Misra ◽  
G. S. Chauhan ◽  
Inderjeet Kaur
Keyword(s):  
Vinyl Acetate ◽  
Isotactic Polypropylene ◽  
Graft Copolymerization ◽  
Optimum Conditions ◽  
Reaction Parameters ◽  
Maximum Percentage ◽  
Radiation Induced ◽  
Isopropenyl Acetate

Radiation-induced graft copolymerization of vinyl acetate (VAC) and isopropenyl acetate (PAC) onto isotactic polypropylene (IPP) has been studied. The percentage of grafting was calculated for various reaction parameters, and the optimum conditions for attaining the maximum percentage of grafting were determined. Maximal achieved extents of grafting are 39% and 29% for VAC and PAC, respectively. The reactivity of the two monomers with respect to grafting is discussed.

Graft copolymerization of poly(vinyl acetate) onto starch using KMnO4-H2SO4 redox system

2013 ◽  
Vol 33 (6) ◽  
pp. 521-526 ◽  
Author(s):  
Baohan Qu ◽  
Hongchun Li ◽  
Yongsheng Niu
Keyword(s):  
Ir Spectra ◽  
Vinyl Acetate ◽  
Graft Copolymerization ◽  
Redox System ◽  
Biodegradable Plastic ◽  
Sago Starch ◽  
Optimum Conditions ◽  
Swelling Power ◽  
Graft Yield

Abstract The graft copolymerization of poly(vinyl acetate) [poly(VAc)] onto starch was studied using the KMnO4-H2SO4 redox system. The grafting parameters are favored by changing the concentration of KMnO4, the concentration of acid, the temperature, the time, and the concentration of monomer. A maximum graft yield of 38.3% was obtained at optimum conditions: KMnO4 concentration=3.0×10-3 mol/l, concentration of acid=1.5×10-2 mol/l, temperature=40°C, time=3 h, and concentration of monomer=1 mol/l. The grafting of poly(VAc) onto starch was confirmed by the IR spectra of pure sago starch, poly(VAc), and poly(VAc) grafted starch. Both swelling power and solubility increased with the increase in temperature. Graft copolymerization increased swelling power and reduced solubility. This material may have use as an application as a biodegradable plastic.

Kinetics of radiation-induced graft copolymerization of vinyl acetate onto ethylene-co-propylene rubber membranes

1997 ◽  
Vol 49 (2) ◽  
pp. 275-278 ◽  
Author(s):  
Fang Yue-E ◽  
Lu Xiao Bing ◽  
Wang Shan Zhi ◽  
Zhao Xia ◽  
Fang Wang
Keyword(s):  
Vinyl Acetate ◽  
Graft Copolymerization ◽  
Radiation Induced ◽  
Kinetics Of

Radiation Induced Graft Copolymerization of Methyl Acrylate and Ethyl Acrylate onto Poly(tetrafluoroethylene-co-ethylene) Film

2002 ◽  
Vol 10 (5) ◽  
pp. 391-404 ◽  
Author(s):  
Inderjeet Kaur ◽  
B. N. Misra ◽  
Raj Kumar ◽  
Baljit Singh
Keyword(s):  
Thermogravimetric Analysis ◽  
Ir Spectroscopy ◽  
Thermal Resistance ◽  
Methyl Acrylate ◽  
Graft Copolymerization ◽  
Ethyl Acrylate ◽  
Vinyl Monomers ◽  
Optimum Conditions ◽  
Radiation Induced

To introduce functional moieties into Tefzel® film, a copolymer of tetrafluoroethylene and ethylene, graft copolymerization of vinyl monomers such as methyl acrylate (MA) and ethyl acrylate (EA) was attempted by a pre-irradiation method in aqueous medium. Optimum conditions for obtaining the maximum grafting was evaluated for both monomers. Maximum grafting of MA (306.0%) and EA (462.1%) was obtained at a total dose of 25.4 and 31.9kGy respectively, using [MA] = 2.20 mol/L and [EA] 0.032 moles. The effect of aliphatic alcohols of varying chain length, such as methanol, ethanol, n-butanol, 1-Pentanol and cyclohexanol on the percentage grafting of MA & EA was also studied. Characterization of Tefzel® and grafted Tefzel® films was carried out by IR spectroscopy and thermogravimetric analysis. Grafted Tefzel® film was found to have improved thermal resistance.

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