Graft copolymers of xyloglucan and methyl methacrylate

Mishra, Anuradha; Malhotra, A.

doi:10.1016/j.carbpol.2011.09.068

Cited by 36 publications

(17 citation statements)

References 34 publications

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“…Among biopolymers, polysaccharides such as starch, cellulose, xyloglucans, pectins and chitosan are of great industrial and academic interest as materials suitable for the physical, enzymatic and chemical modification due to their valuable properties such as low cost, availability, nontoxicity, low environmental pollution or renewability [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15].…”

Section: Introductionmentioning

confidence: 99%

Starch-g-poly(benzyl methacrylate) copolymers

Worzakowska

2016

J Therm Anal Calorim

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The physicochemical properties such as swelling in polar and non-polar solvents, moisture resistance, chemical resistance, ability for gelatinization and the thermal properties along with the evolution of volatile decomposition products of some starch-g-copolymers obtained through the grafting of benzyl methacrylate monomer onto potato starch have been studied. The chemical structure of copolymers was confirmed using ATR-FTIR analysis. The prepared materials were characterized by completely different properties than unmodified potato starch due to the covalent bonding of poly(benzyl methacrylate) chains onto starch backbone. The copolymers were not able to gelate; however, they exhibited higher swelling in non-polar solvents, lower swelling in polar solvents and higher resistance toward moisture, acid and base conditions than unmodified potato starch. In addition, DSC analysis showed that T g of copolymers was shifted to a little higher values as compared to T g of poly(benzyl methacrylate). The thermal stabilities of copolymers and potato starch were comparable. Their decomposition took place in two main stages connected with the emission of various volatile decomposition products (CO 2 , CO, H 2 O, CH 4 , aldehydes, alcohols, furan derivatives, acids, benzyl methacrylate) in inert atmosphere as it was confirmed based on the simultaneous TG/DSC/ FTIR analysis.

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Section: Introductionmentioning

confidence: 99%

Starch-g-poly(benzyl methacrylate) copolymers

Worzakowska

2016

J Therm Anal Calorim

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“…Xyloglucan was obtained on a laboratory scale following methods mentioned in literature . Grafting of AA onto XG through radical polymerization was performed using ceric ion/nitric acid redox initiator and water as reaction medium . The graft copolymer and homopolymer were separated as per the method described by Witonoa et al .…”

Section: Methodsmentioning

confidence: 99%

Quantification of Optimal Reaction Parameters for the Synthesis of a Polysaccharide‐Based Graft Copolymers Using Combined Shannon's Entropy and Data Envelopment Analysis

2019

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The traditional process of synthesis of desired materials involves a trial and error approach, which consumes considerable time and resources. Therefore, it is necessary to implement computer-aided optimizing techniques for the precise synthesis of desired material. This paper presents a novel modeling approach for precise synthesis of graft copolymers of poly(acrylic acid) and Tamarind seed polysaccharide (xyloglucan). Different sets of variables generated through experimental study have been analyzed for the quantification of optimal reaction variables and parameters using combined Shannon's entropy and data envelopment analysis (DEA). Experimental data from the grafting reaction such as concentration of acrylic acid, temperature, and time are used to validate the model and a good agreement between model predictions and experimental data is observed. The proposed innovative green approach for designing the precise synthesis of xyloglucan based graft copolymers may help in identifying the optimal conditions for polymerization reaction to reach targeted materials more efficiently.

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“…[1][2][3][4][5][6][7][8][9][10][11][12][13][14]. On the other hand, the grafting of hydrophobic type monomers, for example, aliphatic meth(acrylate)s or aromatic vinyl monomers, for example, styrene with polysaccharide backbone allows the synthesis of amphiphilic materials, which can be successfully utilized as a fillers, stabilizers, modifiers, matrices as well as more environmentally friendly polymers than synthetic plastics in many practical applications [15][16][17][18][19][20][21]. There are number of papers that describe the influence of different reaction parameters and different experimental methods on the course of the grafting process of vinyl monomers with carbohydrate polymers [11,19,[22][23][24][25][26][27][28][29][30].…”

Section: Introductionmentioning

confidence: 99%

Starch‐g‐poly(phenyl acrylate) copolymers—synthesis, characterization, and physicochemical properties

Worzakowska

2017

Starch Stärke

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Synthesis, characterization, and physicochemical properties of some novel starch‐g‐poly(phenyl acrylate) copolymers are presented. The chemical modification of gelatinized potato starch by grafting with phenyl acrylate using K2S2O8 as a radical initiator and employing different reaction conditions was studied in detail. Depending on the reaction conditions, the grafting parameters were changed, achieving their maximum values (grafting percent G: 41.8%, grafting efficiency GE: 82.3%) at 80°C under a reaction time of 150 min and starch to monomer ratio of 1:2. Spectroscopic methods (FTIR and 13C CP/MAS NMR) confirmed the successful formation of copolymers under the radical reaction of primary and secondary OH groups of starch and carbon–carbon double bonds of phenyl acrylate monomer. Scanning electron microscopy (SEM) indicated a non‐porous, rough, and heterogeneous structure of the copolymers. The blocking of some hydroxyl groups of starch by phenyl acrylate chains allowed more moisture resistant and more acid resistant copolymers to be compared, as compared to unmodified starch. Moreover, the copolymers were insoluble in polar and non‐polar solvents; however, they were able to undergo swelling. The range of swelling was dependent on the grafting parameters as well as the polarity of the solvents. According to DSC analysis, the copolymers exhibited a glass transition temperature of ca. 63–65°C and decomposed under two steps, which were directly connected with the degradation of starch and phenyl acrylate chains.

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Graft copolymers of xyloglucan and methyl methacrylate

Cited by 36 publications

References 34 publications

Starch-g-poly(benzyl methacrylate) copolymers

Starch-g-poly(benzyl methacrylate) copolymers

Quantification of Optimal Reaction Parameters for the Synthesis of a Polysaccharide‐Based Graft Copolymers Using Combined Shannon's Entropy and Data Envelopment Analysis

Starch‐g‐poly(phenyl acrylate) copolymers—synthesis, characterization, and physicochemical properties

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