Rapid synthesis of graft copolymers from natural cellulose fibers

•We study the graft copolymerization of cellulosic Grewia optiva fibers using vinyl monomer.•We examine the effect of redox initiator and microwave radiation on the grafting degree.•Optimization of different reaction parameters such as reaction time, concentration of initiator, and solvent.•Study th...

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Bibliographic Details
Published in:Carbohydrate polymers 2013-10, Vol.98 (1), p.820-828
Main Authors: Thakur, Vijay Kumar, Thakur, Manju Kumari, Gupta, Raju Kumar
Format: Article
Language:English
Subjects:
Acrylates - chemistry
Applied sciences
biosorption
Cellulose
Cellulose - chemical synthesis
Cellulose - chemistry
cellulosic fibers
Chemistry Techniques, Synthetic
composite polymers
Exact sciences and technology
Fibers and threads
Forms of application and semi-finished materials
Fourier transform infrared spectroscopy
Free Radicals - chemistry
Graft copolymerization
Grewia - chemistry
mercerization
microwave radiation
Microwaves
Morphological and physico-chemical properties
packaging
Polymer industry, paints, wood
Polymerization
scanning electron microscopy
solvents
Solvents - chemistry
sulfates
Technology of polymers
Thermal
thermal stability
thermogravimetry
Time Factors
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Summary:•We study the graft copolymerization of cellulosic Grewia optiva fibers using vinyl monomer.•We examine the effect of redox initiator and microwave radiation on the grafting degree.•Optimization of different reaction parameters such as reaction time, concentration of initiator, and solvent.•Study the effect of feed composition of monomer on grafting degree.•Study of physico-chemical and thermal properties of graft copolymers. Cellulose is the most abundant natural polysaccharide polymer, which is used as such or its derivatives in a number of advanced applications, such as in paper, packaging, biosorption, and biomedical. In present communication, in an effort to develop a proficient way to rapidly synthesize poly(methyl acrylate)-graft-cellulose (PMA-g-cellulose) copolymers, rapid graft copolymerization synthesis was carried out under microwave conditions using ferrous ammonium sulfate–potassium per sulfate (FAS–KPS) as redox initiator. Different reaction parameters such as microwave radiation power, ratio of monomer, solvent and initiator concentrations were optimized to get the highest percentage of grafting. Grafting percentage was found to increase with increase in microwave power up to 70%, and maximum 36.73% grafting was obtained after optimization of all parameters. Fourier transforms infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) and thermogravimetric analysis (TGA/DTA/DTG) analysis were used to confirm the graft copolymerization of poly(methyl acrylate) (PMA) onto the mercerized cellulose. The grafted cellulosic polymers were subsequently subjected to the evaluation of different physico-chemical properties in order to access their application in everyday life, in a direction toward green environment. The grafted copolymers demonstrated increased chemical resistance, and higher thermal stability.
ISSN:0144-8617
1879-1344
DOI:10.1016/j.carbpol.2013.06.072