Radiation-induced graft copolymerization of cellulosic fabric waste and its application in the removal of cyanide and dichromate from aqueous solution

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.

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Radiation Induced Graft Copolymerization in Acrylic System

The Journal of the Society of Chemical Industry Japan ◽

10.1246/nikkashi1898.60.840 ◽

1957 ◽

Vol 60 (7) ◽

pp. 840-843 ◽

Cited By ~ 2

Author(s):

Hiroshi Sumitomo ◽

Yoshikazu Hachihama

Keyword(s):

Graft Copolymerization ◽

Radiation Induced

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Studies on Grafting Copolymerization of Lactic Acid onto Cornstarch Catalyzed with Sodium Hydroxide

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.233-235.1906 ◽

2011 ◽

Vol 233-235 ◽

pp. 1906-1910

Author(s):

Ying Mo Hu ◽

Qing Ling Wang ◽

Jian Hua Zhu ◽

Yang Liu ◽

Xue Yang ◽

...

Keyword(s):

Aqueous Solution ◽

Lactic Acid ◽

Sodium Hydroxide ◽

Convenient Method ◽

Graft Copolymerization ◽

Good Adhesion ◽

Acid Copolymer ◽

Grafting Copolymerization ◽

Grafting Degree

A convenient method to synthesize starch/lactic acid copolymer was studied in this work. Copolymer of starch graft with lactic acid (LA) was directly prepared by reaction of cornstarch with lactic acid in sodium hydroxide (NaOH) aqueous solution as a catalyst. The product was characterized by IR and WAXD, and the good adhesion between the two components has been observed by SEM. The results showed that the highest grafting degree could reach 33.60% when the graft copolymerization was carried in 0.40 mol·L-1 NaOH aqueous for 9 h at 90°C with the 1: 5~6 ratio of starch and lactic acid.

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Novel pH-Sensitive Poly(Vinyl Alcohol) Based Polyampholyte as Pervaporation Membrane

Materials Science Forum ◽

10.4028/www.scientific.net/msf.852.979 ◽

2016 ◽

Vol 852 ◽

pp. 979-983

Author(s):

Ping Rui Meng ◽

Liang Bo Li

Keyword(s):

Aqueous Solution ◽

Vinyl Alcohol ◽

Water Resistance ◽

Graft Copolymerization ◽

Sodium Acrylate ◽

Poly Vinyl Alcohol ◽

Permeate Flux ◽

Ft Ir ◽

Ethanol Aqueous Solution ◽

Poly Acrylamide

Sodium acrylate (NaAA) and acrylamide (AM) were grafted onto poly (vinyl alcohol) (PVA) using potassium persulfate as an initiator, Graft copolymerization namely poly (vinyl alcohol)-g-poly (acrylamide/sodium acrylate) (PVA-g-PAM/SAC). The poly (vinyl alcohol)-g-poly (vinylamine/sodium acrylate) (PVAMC) was prepraed by Hofmann rearrangement.The PVAMC homogeneous membrane was characterized by fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM).The water resistance of the PVAMC membranes is the best when pH of the PVAMC solutions was 4, at that time the numbers of-NH3+ and-COO- groups trended to be equal, so the isoelectric point was pH=4. At 90 °C the pervaporation of PVAMC composite membrane was tested and showed that the separation factor and the permeate flux were about 1001 and 1341 g/(m2·h) for 90wt% ethanol aqueous solution, and they were about 1297 and 1040 g/(m2·h) for 90wt% isopropanol aqueous solution.

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