scholarly journals Synthesis and Characterization of Poly(methyl acrylate)-grafted-Sodium Salt of Partially Carboxymethylated Tamarind Kernel Powder

2022 ◽  
Vol 34 (2) ◽  
pp. 263-271
Author(s):  
J.H. Trivedi ◽  
J.R. Jivani ◽  
K.H. Patel ◽  
H.C. Trivedi
Keyword(s):  
Sodium Salt ◽  
Methyl Acrylate ◽  
Graft Copolymerization ◽  
Reaction Medium ◽  
Ceric Ammonium Nitrate ◽  
Solution Polymerization ◽  
Reaction Conditions ◽  
Tamarind Kernel

Ceric ammonium nitrate (CAN)-initiated graft copolymerization of methyl acrylate (MA) onto sodium salt of partially carboxymethylated tamarind kernel powder (Na-PCMTKP, DS = 0.15) was studied in an aqueous medium by solution polymerization technique. The growth of the graft reaction was monitored gravimetrically. The role of various synthesis variables on the grafting yields was examined to achieve the maximum graft yields (%G = 278.27, %GE = 94.38, %Hp = 5.62) and the influence of the synthesis variables in the graft copolymerization has been discussed. The reactivity of methyl acrylate (MA) towards graft copolymerization was compared with that of acrylonitrile (AN) on the basis of the results obtained from the earlier studies and plausible explanation was furnished for the observed reactivity of both the monomers towards grafting. The evaluated optimized reaction conditions were utilized to study the effect of reaction medium on grafting and it was found that reaction medium plays an important role in graft copolymerization. In order to ascertain the grafting, characterization of the samples made by FTIR, TGA and SEM was conducted. The synthesized novel graft copolymer may find potential application to be used as metal adsorbents.

Modification of Sodium Salt of Partially Carboxymethylated Guar Gum by Graft Copolymerization with Methyl Acrylate

2005 ◽  
Vol 13 (3) ◽  
pp. 301-312
Author(s):  
Jignesh H. Trivedi ◽  
Natu K. Patel ◽  
Harikrishna C. Trivedi ◽  
Kiran Kalia
Keyword(s):  
Sodium Salt ◽  
Methyl Acrylate ◽  
Guar Gum ◽  
Graft Copolymerization ◽  
Kinetic Scheme ◽  
Ceric Ammonium Nitrate ◽  
Electron Microscopic ◽  
Reaction Conditions ◽  
Redox Initiator ◽  
Ir Spectroscopic

Grafting of methyl acrylate onto sodium salt of partially carboxymethylated guar gum (backbone) was carried out using ceric ammonium nitrate as a redox initiator in an aqueous medium. The reaction variables including concentrations of initiator, nitric acid, monomer and amount of the backbone as well as time and temperature were varied for establishing the optimized reaction conditions for grafting. The influence of these reaction parameters on the grafting yields and the rates of polymerization, graft copolymerization and homopolymerization was also studied and the results were discussed. The kinetic scheme of free radical graft copolymerization was proposed and the experimental results were found to agree very well with the proposed kinetic scheme. The graft copolymer sample was characterized by IR-spectroscopic, thermal and scanning electron microscopic techniques.

Ceric-induced grafting of acrylonitrile onto sodium alginate: kinetics and mechanism and effects of the reaction medium

1994 ◽  
Vol 6 (3) ◽  
pp. 193-200 ◽  
Author(s):  
S B Shah ◽  
C P Patel ◽  
H C Trivedi
Keyword(s):  
Free Radical ◽  
Ammonium Nitrate ◽  
Sodium Alginate ◽  
Graft Copolymerization ◽  
Mixed Solvents ◽  
Reaction Medium ◽  
Kinetic Scheme ◽  
Water Systems ◽  
Ceric Ammonium Nitrate ◽  
Good Agreement

The kinetic scheme of free radical graft copolymerization of acrylonitrile (AN) onto sodium alginate, using ceric ammonium nitrate as an initiator, has been proposed and equations relating the values of Rp, Rr and Rh are also suggested. The results have been found to be in good agreement with the proposed mechanism. The per cent grafting of AN onto sodium alginate has also been determined as a function of composition of the mixed solvents comprising methanol: water, ethanol: water, n-propanol:water and n-butanol: water systems. The reaction medium has been found to play an important role in graft copolymerization. The results of the effect of the reaction medium on grafting are also discussed.

scholarly journals Preparation and Characterization of Superabsorbent Polymer (SAP) by Graft Polymerization of Carboxymethyl Cellulose

2016 ◽  
Vol 70 ◽  
pp. 27-32 ◽  
Author(s):  
A.B.M. Nazmul Islam ◽  
Md. Anisul Islam
Keyword(s):  
Carboxymethyl Cellulose ◽  
Graft Polymerization ◽  
Graft Copolymerization ◽  
Ceric Ammonium Nitrate ◽  
Superabsorbent Polymer ◽  
Force Microscopy ◽  
Atomic Force ◽  
Swelling Studies ◽  
Acrylamide Monomer

The synthesis of superabsorbent polymer with Carboxymethyl cellulose using ceric ammonium nitrate (CAN) initiated acrylamide (AA) monomer through a solution based graft copolymerization has been conducted. The characterizing studies were performed using Fourier transform infrared (FTIR) spectroscopy, Atomic force microscopy (AFM) and swelling studies. FTIR spectra established crosslinked polymeric network structure of hydrogels through graft copolymerization reaction between CMC and acrylamide indicating incorporation of acrylamide monomer resulting the formation of carboxamide group (>C=O). AFM showed the surface morphology or properties of superabsorbent. The hydrophilic properties of the superabsorbent were identified by the swelling percentage or degree of swelling.

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.

Graft copolymerization of methyl acrylate onto pullulan using ceric ammonium nitrate as initiator

2009 ◽  
Vol 76 (1) ◽  
pp. 129-132 ◽  
Author(s):  
Shengjun Wu ◽  
Zhengyu Jin ◽  
Jin Moon Kim ◽  
Qunyi Tong ◽  
Hanqing Chen
Keyword(s):  
Ammonium Nitrate ◽  
Methyl Acrylate ◽  
Graft Copolymerization ◽  
Ceric Ammonium Nitrate

scholarly journals Graft copolymerization of methyl acrylate onto sago starch using ceric ammonium nitrate as an initiator

2000 ◽  
Vol 76 (4) ◽  
pp. 516-523 ◽  
Author(s):  
Lutfor Rahman ◽  
Sidik Silong ◽  
Wan Md Zin ◽  
M. Zaki Ab Rahman ◽  
Mansor Ahmad ◽  
...  
Keyword(s):  
Ammonium Nitrate ◽  
Methyl Acrylate ◽  
Graft Copolymerization ◽  
Ceric Ammonium Nitrate ◽  
Sago Starch

Graft Copolymerization of Soybean Protein Isolated and Methyl Acrylate as a New Thermoplastic Material

2011 ◽  
Vol 221 ◽  
pp. 644-648 ◽  
Author(s):  
Yan Lu ◽  
Xue Gang Luo ◽  
Xiao Yan Lin ◽  
Chi Zhang
Keyword(s):  
Soy Protein ◽  
Methyl Acrylate ◽  
Graft Copolymerization ◽  
Soybean Protein ◽  
Ammonium Persulfate ◽  
Optimal Conditions ◽  
Reaction Conditions ◽  
Thermoplastic Material ◽  
Ft Ir ◽  
Urea Aqueous Solution

New thermoplastic soy protein isolated (SPI) and methyl acrylate (MA) copolymers (T-SPI-g-MA) were prepared using graft copolymerization and initiated with ammonium persulfate (APS). The reaction conditions such as initiator concentration and temperature on the graft percentage (GP) were investigated. The single factor experimental showed that the optimal conditions for grafting of 15g SPI were: 4 g initiator of APS, 60 mL monomer of MA and in 250 mL 2M urea aqueous solution at 70 °C for 3 hours. The products were characterized by means of FT-IR and DSC. The results indicated that the monomer was grafted successfully on SPI and the T-SPI-g-MA had a glass transition at 22 °C.

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