Amine activators influence on grafting reaction between methacrylic acid and starch

Nikolić, Vladimir; Veličković, Suzana; Popović, Aleksandar

doi:10.1016/j.carbpol.2012.02.027

Cited by 26 publications

(12 citation statements)

References 40 publications

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“…Synthesis of starch-graft--PMAA copolymers and the obtained results were previously described. 47 The starch-graft-PS copolymers were prepared by emulsion polymerization in the presence of potassium persulfate/amine initiation redox system and sodium dodecyl sulfate (SDS) as the emulsifier. Water (80 mL), cornstarch (10 g), styrene (10 g) and SDS (0.23 g, 8.0×10 -4 mol) were first added in the reaction vessel.…”

Section: Methodsmentioning

confidence: 99%

Biodegradation of starch–graft–polystyrene and starch–graft–poly(methacrylic acid) copolymers in model river water

Nikolić¹,

Veličković²,

Antonović³

et al. 2013

JSCS

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In this paper the biodegradation study of grafted copolymers of polystyrene (PS) and corn starch and poly(methacrylic acid) and corn starch in model river water is described. These copolymers were obtained in the presence of different amine activators. The synthesized copolymers and products of degradation were characterized by Fourier Transform Infrared Spectroscopy (FTIR) and Scanning Electron Microscopy (SEM). Biodegradation was monitored by mass decrease and number of microorganisms by Koch’s method. Biodegradation of both copolymers advanced with time, poly(methacrylic acid)-graft-starch copolymers completely degraded after 21 day, and polystyrene-graft-starch partially degraded (45.78-93.09 % of total mass) after 27 days. Differences in the degree of biodegradation are consequences of different structure of the samples, and there is a significant negative correlation between the share of polystyrene in copolymer and degree of biodegradation. The grafting degree of PS necessary to prevent biodegradation was 54 %. Based on experimental evidence, mechanisms of both biodegradation processes are proposed, and influence of degree of starch and synthetic component of copolymers on degradation were established. [Projekat Ministarstva nauke Republike Srbije, br. 172001 i br. 172062

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Section: Methodsmentioning

confidence: 99%

Biodegradation of starch–graft–polystyrene and starch–graft–poly(methacrylic acid) copolymers in model river water

Nikolić¹,

Veličković²,

Antonović³

et al. 2013

JSCS

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“…Other parameters were studied to improve the grafting on starch in emulsion conditions such as the use of ionic liquid as the solvent to get homogeneous media (complete dissolution of starch before the reaction with styrene, GP = 20–110%) or amine activation in the initiation step of the graft copolymerizations involving styrene and methacrylic acid . The nature of the alkyl group of the amine was shown to have a strong influence on the grafting percentage.…”

Section: Grafting From Via Radical Polymerizationmentioning

confidence: 99%

Modification of starch by graft copolymerization

et al. 2017

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Research toward bio-based and biodegradable polymers has received a lot of attention these last years, due to environmental concerns and the need to replace fossil resources. Starch is in this frame an interesting starting material due to its abundance and low cost. Native starch displays however, poor mechanical properties and is highly hydrophilic. New starch-based thermoplastic materials can be prepared to overcome these drawbacks by chemical modification, and notably graft copolymerization. A large range of polymers can be grafted on starch by ring-opening and radical polymerizations of various monomers in order to modulate the properties of the final product. Polymers can also be directly grafted onto starch using coupling strategies. This review presents the state of the art in the field.

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Section: Introductionmentioning

confidence: 99%

“…The graft copolymerization of starch with vinyl monomers has been extensively studied and recognized as one of the most effective methods for improving starch properties . This technique imparts desirable and useful properties to starch without sacrificing its biodegradable nature, thereby expanding the range of starch application . These starch products are referred to starch graft copolymers or grafted starches, and have found wide applications in many fields such as warp sizing, paper making, oilfield drilling, and water purification .…”

Section: Introductionmentioning

confidence: 99%

Desizability of the Grafted Starches Used as Warp Sizing agents

Liu

Zhu

et al. 2017

Starch Stärke

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An attempt is made to examine the effect of the consitituent units in the branches grafted onto the backbones of starch on the desizability of grafted starches for warp sizing. The starches investigated include starch‐g‐polyacrylamide, starch‐g‐poly(acrylic acid), starch‐g‐polyacrylate, and starch‐g‐polymethacrylate, which are synthesized via graft copolymerization in water using Fe2+‐H2O2 initiators. The desizability is evaluated by enzyme, alkali, and oxidant desizings in terms of desizing efficiency, water swellability of starch film, and the time for breaking the starch film in water. It is found that the constituent units play an important role in desizability. Hydrophilic units are superior to hydrophobic ones in improving desizability. For the (meth)acrylate units, the increase in the number of carbon atoms in alkyl esters and the presence of α‐methyl show adverse impact on desizability. An increase in the grafting ratio of starch‐g‐polyacrylamide favors improvement of the desizabity whereas the increase in the ratio of starch‐g‐poly(methyl acrylate) reduces the desizabity. Of the three desizing methods considered here, oxidant and enzyme desizings have superior desizability to alkali one.

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Amine activators influence on grafting reaction between methacrylic acid and starch

Cited by 26 publications

References 40 publications

Biodegradation of starch–graft–polystyrene and starch–graft–poly(methacrylic acid) copolymers in model river water

Biodegradation of starch–graft–polystyrene and starch–graft–poly(methacrylic acid) copolymers in model river water

Modification of starch by graft copolymerization

Desizability of the Grafted Starches Used as Warp Sizing agents

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