Poly[ethylene‐co‐(vinyl alcohol)]‐graft‐Poly(ε‐caprolactone) by Reactive Extrusion, 2 – Parameter Analysis

Zhao, Yanliang; Becquart, Frédéric; Chalamet, Yvan; Chen, Jianding D.; Taha, Mohamed

doi:10.1002/mame.200900136

Cited by 9 publications

(7 citation statements)

References 38 publications

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“…[5] The first one is the addition of a graft or block copolymer. [6][7][8][9][10][11][12] To form a graft copolymer, two strategies exist, the grafting from between polymers [13][14][15][16][17][18][19][20][21] and the grafting onto, [22][23][24][25][26][27][28][29] with a polymer bearing an initiating function previously induced by ozonolysis or irradiation. [30,31] A coupling reaction through a function can also be used to generate specific functions onto a polymer chain moiety to then start a grafting from or a grafting onto.…”

Section: Introductionmentioning

confidence: 99%

Solvent-free preparation, characterization, and properties of SEBS–g–polycarbonate copolymers

Chevallier

Becquart

Majesté

et al. 2013

Designed Monomers and Polymers

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The reactions between polycarbonate (PC) and polystyrene-block-poly(ethylene-butylene)-block-polystyrene-graftedmaleic anhydride (SEBS-g-MAH) is a novel, convenient, solvent-free, and easy way to create SEBS-g-PC in order to compatibilize polystyrene and PC blends. This study determines the most efficient catalyst among Tin (II) bis(2-ethylhexanoate) (SnOct 2 ), 1,5,7-Triazabicyclo[4.4.0]dec-5-ene (TBD), Titanium tetrabutoxide (Ti(OBu) 4 ) and Sodium 4-hydroxybenzenesulfonate dihydrate (SHBS) in the molten state at 220°C. From 20 to 30 wt% of SEBS-g-MAH (or KFG) chains became insoluble. The size exclusion chromatography analyses showed the formation of a double distribution due to PC chains scission and grafting reactions onto SEBS-g-MAH with the exception of the Ti(BuO) 4 use. Fine microstructures with a percolation effect proved the efficiency of both the TBD and the SnOct 2 . The PC transition temperature decreased in at least 10°C, confirmed that only SnOct 2 and TBD were efficient to catalyze the grafting reactions. No evolution was observed with the SHBS and Ti(OBu) 4.

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Section: Introductionmentioning

confidence: 99%

Solvent-free preparation, characterization, and properties of SEBS–g–polycarbonate copolymers

Chevallier

Becquart

Majesté

et al. 2013

Designed Monomers and Polymers

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“…Different copolymers were obtained which had interesting elastomeric and adhesion properties. Nevertheless, even if ε-caprolactone conversion can be almost total, some caprolactone residuals can subsist [22,23]. In other studies, and to avoid CL presence in the obtained materials, PCL was grafted onto EVOH [24].…”

Section: Introductionmentioning

confidence: 99%

Effect of Compatibilization on Poly-ε-Caprolactone Grafting onto Poly(ethylene-co-vinyl alcohol)

et al. 2011

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Abstract:The non-miscibility of the reactants during solvent free poly-ε-caprolactone grafting onto poly(ethylene-co-vinyl alcohol) (EVOH) dramatically affects reaction kinetics. Different solutions were proposed to accelerate the exchange reactions between poly(ethylene-co-vinyl alcohol) and poly-ε-caprolactone. Reactions were conducted in a batch reactor or a mini twin-screw extruder. The addition of a poly(ethylene-co-vinyl alcohol)-g-poly-ε-caprolactone copolymer increased the compatibility of the reactants and led to a higher reaction rate. This copolymer was either prepared separately and added at the reaction beginning or prepared in situ grafting caprolactone from EVOH. The reactive system evolution was analyzed using molar mass evolution, microstructure characterization, thermal properties and the reactive blend morphology. The compatibilization effect combined with optimized reaction conditions, such as concentration and nature of catalyst and temperature, resulted in an important increase in reaction rates. Among the tested catalysts, 1,5,7-Triazabicyclo [4.4.0]dec-5-ene was a more efficient catalyst for grafting reactions than Tin (II) 2-ethylhexanoate.

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“…Numerical simulations have been devoted to reactive extrusion processes for quantitatively analyzing the reaction trend and optimizing the processing conditions . Such simulations have been performed by Motha and Seppala for the grafting of carboxylic acids and silanes to ethylene polymers, Hojabr et al for the grafting of GMA onto PE, Fukuoka for the grafting between PE and vinylsilane, Keum and White, Zhu et al, and Aguiar et al for the grafting of maleic anhydride on PP, and Zhao et al for poly[ethylene‐ co ‐(vinyl alcohol)]‐graft‐poly(Ε‐caprolactone) . With accurate numerical models, evolutions of key variables such as monomer conversion, grafting degree and fluid viscosity can be quantitatively predicted.…”

Section: Introductionmentioning

confidence: 99%

Kinetic study on free radical grafting of polyethylene with acrylic acid by reactive extrusion

Zhang

Jia

2014

J of Applied Polymer Sci

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In the reactive extrusion process for the free radical grafting of acid monomers onto polyethylene, monomer grafting and homopolymerization occur simultaneously and interact with each other. Using an incremental theory, mathematical models of conversions for monomer grafting and homopolymerization were separately constructed to predict the grafting degree, mass of homopolymer and grafting efficiency. Effects of the barrel temperature, initial monomer and initiator concentrations on grafting behaviors were investigated. The barrel temperature and initial monomer concentration were shown to be the main process parameters for controlling the grafting degree. The grafting degree and mass of homopolymer increased significantly with increasing barrel temperature and monomer concentration and increased marginally with increasing initiator concentration. No significant improvement in the grafting efficiency was observed. The predictions of the models are in good agreement with experimental data. © 2014 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 40990.

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Poly[ethylene‐co‐(vinyl alcohol)]‐graft‐Poly(ε‐caprolactone) by Reactive Extrusion, 2 – Parameter Analysis

Cited by 9 publications

References 38 publications

Solvent-free preparation, characterization, and properties of SEBS–g–polycarbonate copolymers

Solvent-free preparation, characterization, and properties of SEBS–g–polycarbonate copolymers

Effect of Compatibilization on Poly-ε-Caprolactone Grafting onto Poly(ethylene-co-vinyl alcohol)

Kinetic study on free radical grafting of polyethylene with acrylic acid by reactive extrusion

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