CHARACTERISTIC OF ACRYLIC ACID GRAFTED POLYETHYLENE FILM PREPARED BY GAMMA IRRADIATION METHOD

In this study, high density polyethylene (PE) film (thickness 80 μm) was modified by grafting of acrylic acid (AA) onto the film using 15 kGy of g irradiation as initiator, applied at different exposure times. In addition to irradiation dose, other variables investigated are concentration of AA, the type of solvent, and polymerization time carried out at 60 oC. The success of the graft copolymerization processes was confirmed by analysing the grafted film using FTIR spectroscopy, which revealed the existence of absorption band at wave number of 1721 cm-1 (assigned to C=O), and that at 3385 cm-1 (assigned to -OH), and the physical endurance of the sample was evaluated by carrying out tensile strength measurement. The percent of grafting was determined according to the gravimetric method. The results indicated that the highest percent of grafting was obtained by application of 2-hour irradiation time, with monomer concentration of 30 % in water as a solvent, grafting temperature of 60 oC. Activity of grafted was evaluated by measurement of the absorption capacity toward water and Cu2+ ion, and revealed the increase of the absorption capacity with increased percent of grafting. Keywords: Graft copolymerization, acrylic acid, low density polyethylene, gamma irradiation, water absorbency, absorption of cupric ion

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Microwave-Irradiated Preparation of Super Absorbent Resin by Graft Copolymerization of Starch and Acrylic Acid

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.291-294.1335 ◽

2011 ◽

Vol 291-294 ◽

pp. 1335-1338

Author(s):

Da Biao Zhao

Keyword(s):

Acrylic Acid ◽

Microwave Irradiation ◽

Graft Copolymerization ◽

Irradiation Time ◽

Low Cost ◽

Power Level ◽

Conventional Heating ◽

Simple Process ◽

One Step ◽

Microwave Power Level

Graft copolymerization of acrylic acid(AA) on starch to prepare super absorbent resin (SAR) under microwave irradiation were investigated using N,N-methylene bis-acrylamide as crosslinker and potassium persulfate as initiator. The influences of the amount of initiator and crosslinker, neutralization degree of acrylic acid(AA), ratio of starch to AA, microwave power level and irradiation time on the distilled water absorption amount of resin were investigated. The results indicated that it only needed 4min under the microwave level of 231W to obtain the resin with the maximum absorption amount of 1110g×g-1, under the conditions that 0.3wt% initiator, 0.02wt% crosslinker, 60% neutralization degree of acrylic acid, the ratio of starch to acrylic acid of 0.25. Under microwave irradiation, the synthesis and drying of super absorbent resin could be completed at one step without nitrogen. Compared to conventional heating method, the methods had the striking advantages of short reaction time, simple process and low cost.

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Preparation of polyethylene-g-(polyacrylic acid) and its sodium salt ionomer by in-situ chlorinating graft copolymerization

e-Polymers ◽

10.1515/epoly.2011.11.1.944 ◽

2011 ◽

Vol 11 (1) ◽

Author(s):

Zhi-Qiang Zhao ◽

Shuang-Shuang Wang ◽

Na Wang ◽

Ji-Ruo Zhao ◽

Ying Feng

Keyword(s):

Acrylic Acid ◽

Graft Copolymer ◽

Sodium Salt ◽

Graft Copolymerization ◽

Monomer Concentration ◽

Gel Permeation Chromatography ◽

Reaction Process ◽

Side Reactions ◽

Chlorinated Polyethylene

AbstractAcrylic acid (AA) was grafted firstly onto high density polyethylene (HDPE) by in-situ chlorinating graft copolymerization (ISCGC), so a graft copolymer composed of chlorinated polyethylene (CPE) as backbone and poly (acrylic acid) (PAA) as branched chains was synthesized. And subsequently the preparation of its carboxylated ionmers was studied. This work was focused on discussing the reaction process for grafting AA onto HDPE by ISCGC and the preparing of carboxylated ionmers of CPE. In this paper, the structure of graft copolymer and the ionomer were characterized mainly by FT-IR, gel permeation chromatography (GPC) and graft degree (GD). The influence factors which related to the main and side reactions, including the monomer concentration, chlorine contents of the product, and reaction temperature were investigated. Additionally, effects of these factors on reaction process controlling were described. The aim of above is to investigate how CPE-cg-PAA and its sodium-salt ionomer were prepared.

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Improving the Compatibility of Zein/Poly(vinyl alcohol) Blends by Gamma Irradiation and Graft Copolymerization of Acrylic Acid

Journal of Agricultural and Food Chemistry ◽

10.1021/jf904088y ◽

2010 ◽

Vol 58 (7) ◽

pp. 4470-4476 ◽

Cited By ~ 31

Author(s):

Magdy M. Senna ◽

Stephane Salmieri ◽

Abdel-Wahab El-naggar ◽

Agnes Safrany ◽

Monique Lacroix

Keyword(s):

Acrylic Acid ◽

Gamma Irradiation ◽

Vinyl Alcohol ◽

Graft Copolymerization ◽

Poly Vinyl Alcohol

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Study of Irradiation Hydrophilic Modification of Polypropylene Meltblown Nonwovens

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.627.348 ◽

2012 ◽

Vol 627 ◽

pp. 348-352

Author(s):

Lei Xia ◽

Peng Xi ◽

Bo Wen Cheng

Keyword(s):

Acrylic Acid ◽

Technology Use ◽

Irradiation Dose ◽

Graft Copolymerization ◽

Breaking Strength ◽

Monomer Concentration ◽

High Energy ◽

Hydrophilic Modification ◽

Energy Beam ◽

Irradiation Technology

In this paper, we took the co-irradiation technology, use the high-energy beam irradiate the polypropylene meltblown nonwovens which soaked with acrylic acid, so that the graft copolymerization reaction was occurred between the acrylic and the polypropylene, the influence of acrylic acid concentration and the irradiation dose to the hydrophilic properties and breaking strength were studied. The results shows that when the monomer concentration was between 2% and 8% and the irradiation dose was between 10kGy and 50 kGy, the hydrophilic properties increased with the increasing of the monomer concentration and irradiation dose. But the breaking strength wasn’t affected.

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pH Sensitive Polysulfone Membranes Prepared by Homogeneous Photo-Initiated Graft Copolymerization

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.396-398.586 ◽

2011 ◽

Vol 396-398 ◽

pp. 586-591

Author(s):

He Lin Hua ◽

Jun Chao Zhang ◽

Na Li ◽

Li An Wei

Keyword(s):

Acrylic Acid ◽

Photoelectron Spectroscopy ◽

Graft Copolymerization ◽

Ph Value ◽

Irradiation Time ◽

Attenuated Total Reflection ◽

Inversion Method ◽

Spectroscopy Analysis ◽

X Ray ◽

Phase Inversion Method

The copolymers of polysulfone-graft-acrylic (PSF-g-PAAc) acid were synthesized by homogeneous photo-initiated graft copolymerization method. Variable affecting the degree of grafting (DG), such as the ultraviolet irradiation time, and the concentrations of the acrylic acid monomer and photoinitiator, were investigated. The graft copolymers were characterized by chemical titration, attenuated total reflection-Fourier transform infrared spectroscopy and x-ray photoelectron spectroscopy analysis. It is verified that acrylic acid groups were present on the polysulfone polymer. Then, membranes were prepared from the PSF-g-PAAc powder with different DG using phase inversion method. It is found that the flux properties of the membranes were dependent on the pH value of the aqueous solution.

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DETERMINATION OF A SUITABLE CONDITION OF GRAFT COPOLYMERIZATION OF VINYLTRIETHOXYSILANE ONTO NR TO FORM NANOMATRIX STRUCTURE

Rubber Chemistry and Technology ◽

10.5254/rct.18.81545 ◽

2018 ◽

Vol 91 (4) ◽

pp. 767-775 ◽

Cited By ~ 2

Author(s):

Yuanbing Zhou ◽

Yoshimasa Yamamoto ◽

Seiichi Kawahara

Keyword(s):

Silica Nanoparticles ◽

Graft Copolymerization ◽

Monomer Concentration ◽

Minor Component ◽

Suitable Condition ◽

Average Diameter ◽

Silica Matrix ◽

Rubber Particles ◽

Hydrolysis And Condensation ◽

Nanomatrix Structure

ABSTRACT Graft copolymerization of vinyltriethoxysilane (VTES) onto NR particles in the latex stage is a unique reaction, since it occurs together with hydrolysis and condensation of the triethoxysilane group of VTES to form a colloidal silica linking to the rubber particles. These reactions may contribute to the formation of a silica nanomatrix structure that consists of a dispersoid of rubber particles as the major component and a silica matrix as the minor component. Here, the graft copolymerization of VTES followed by hydrolysis and condensation is investigated to determine a suitable condition to prepare NR with a silica nanomatrix structure. The mechanical properties of the resulting graft copolymer are discussed in relation to the morphology, silica content, and gel content of the rubber. Based on morphological observations, NR particles with an average diameter of approximately 1 μm are well dispersed in a nanomatrix consisting of silica nanoparticles. The thickness of the silica nanomatrix increases as the monomer concentration increases, and a long incubation time generates large silica nanoparticles. The tensile strength and viscoelastic properties are significantly improved by forming the silica nanomatrix structure, with its continuous structure that prevents the NR particles from merging.

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