Observations on the swelling behaviour of copolymeric hydrogels containing <i>N</i>‐vinyl‐2‐pyrrolidone

Al-Issa, Mahmoud A.; Davis, Thomas P.; Huglin, Malcolm B.; Rego, Jose M.; Rehab, Mahmoud M. A. M.; Yip, Daniel C. F.; Zakaria, Mat B.

doi:10.1002/macp.1990.021910206

Cited by 19 publications

(2 citation statements)

References 16 publications

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“…The Tidwell–Mortimer method provides the most probable reactivity ratio values, as checked by the elliptical diagram13 of the 95% confidence limit of the reactivity ratios of the EPM–MMA and EPyM–MMA copolymerization reactions. In this sense, the comonomer pair EPM–MMA had the reactivity ratios r EPM = 1.11 and r MMA = 0.76; in comparison with VP–MMA14, 15 ( r VP = 0.005 and r MMA = 4.7), the methacrylic derivative of EP showed a higher reactivity with MMA in radical copolymerization processes, which is an interesting characteristic for the preparation of copolymer systems with a controlled hydrophilic–hydrophobic balance with applications in the field of biomedicine. However, comonomers EPyM and MMA had the reactivity ratios r EPyM = 1.31 and r MMA = 0.92, which implied, as for the EPM–MMA copolymers, that the propagating species ending in EPM or EPyM were slightly more reactive toward themselves than to MMA molecules, and MMA‐ending propagating species reacted slightly more toward EPM and EPyM species than toward its own MMA monomer.…”

Section: Resultsmentioning

confidence: 91%

Hydrophilic and hydrophobic copolymer systems based on acrylic derivatives of pyrrolidone and pyrrolidine

González

Elvira

Román

2002

J. Polym. Sci. A Polym. Chem.

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This article deals with the synthesis of hydrophilic methacrylic monomers derived from ethyl pyrrolidone [2‐ethyl‐(2‐pyrrolidone) methacrylate (EPM)] and ethyl pyrrolidine [2‐ethyl‐(2‐pyrrolidine) methacrylate (EPyM)] and their respective homopolymers. For the determination of their reactivity in radical copolymerization reactions, both monomers were copolymerized with methyl methacrylate (MMA), the reactivity ratios being calculated by the application of linear and nonlinear mathematical methods. EPM and MMA had ratios of rEPM = 1.11 and rMMA = 0.76, and this indicated that EPM with MMA had a higher reactivity in radical copolymerization processes than vinyl pyrrolidone (VP; rVP = 0.005 and rMMA = 4.7). EPyM and MMA had reactivity ratios of rEPyM = 1.31 and rMMA = 0.92, and this implied, as for the EPM–MMA copolymers, a tendency to form random or Bernoullian copolymers. The glass‐transition temperatures of the prepared copolymers were determined by differential scanning calorimetry (DSC) and were found to adjust to the Fox equation. Total‐conversion copolymers were prepared, and their behavior in aqueous media was found to be dependent on the copolymer composition. The swelling kinetics of the copolymers followed water transport mechanism case II, which is the most desirable kinetic behavior for a swelling controlled‐release material. Finally, the different states of water in the hydrogels—nonfreezing water, freezing bound water, and unbound freezing water—were determined by DSC and found to be dependent on the hydrophilic and hydrophobic units of the copolymers. © 2002 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 41: 395–407, 2003

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Section: Resultsmentioning

confidence: 91%

Hydrophilic and hydrophobic copolymer systems based on acrylic derivatives of pyrrolidone and pyrrolidine

González

Elvira

Román

2002

J. Polym. Sci. A Polym. Chem.

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“…It has the property of forming complexes with a variety of substances (Buhler 1998;Sheth and Bhattacharya 1987). Some researchers have discussed the interaction of PVP with certain inorganic and organic compounds (Al-Issa et al 1990;Maruthamuthu and Subramanian 1989;Sheth 1991). However, the interactions between PVP and textile dyes have been studied only to a limited extent, and sufficient information is not available on the effect of the polymer chain or the composition of textile dyes containing sulphonyl groups in the interaction.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Some Textile Dyes onto Crosslinked Poly(N-Vinylpyrrolidone)

Ekici

Işıkver

Şahiner

et al. 2003

Adsorption Science & Technology

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ABSTRACT:The adsorption of some textile dyes such as Indigosol Blau IBC, Iyozol Turkish G, Iyozol Black B, Remazol Brilliant Orange 3R, Remazol Brilliant Violet 5R, Remazol Blau 3R, Sumufix Red 3BF and Everzol Yellow 4GL with crosslinked poly(N-vinylpyrrolidone) was investigated. Adsorption of these textile dyes onto crosslinked poly(N-vinylpyrrolidone) was studied by batch adsorption techniques at 25ºC. The adsorption isotherms obtained were L-type (Langmuir-type) according to the Giles classification system. Adsorption studies indicated that monolayer coverage of the crosslinked poly-(N-vinylpyrrolidone) by the dyes studied increased in the order: Indigosol Blau IBC Iyozol Turkish G Sumufix Red 3BF Iyozol Black B Remazol Brilliant Orange 3R Remazol Blau 3R Everzol Yellow 4GL Remazol Brilliant Violet 5R. Values of the removal efficiency of the dyes ranged from 21% to 81%.

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Effect of crosslinking on the properties of poly(2‐hydroxyethyl methacrylate) hydrogels

Davis

Huglin

1991

Angew. Makromol. Chem.

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By means of y-irradiation 2-hydroxyethyl methacrylate has been copolymerized in bulk with two different tetrafunctional monomers, ethylene glycol dimethacrylate and 1,3-bis(acryloxymethy1) tetramethyl disiloxane and with a hexafunctional monomer, 1,1,1 -trimethylolpropane trimethacrylate. The resultant xerogels were subsequently swollen to equilibrium in water. In order to allow a comparison among the three crosslinkers, their molar masses and funtionalities were taken into account, the theoretical crosslink concentrations being varied from 0.032 to 0.644 mol dm-3. The relative hydrophobicity of the three crosslinkers was found to have a significant effect on both the equilibrium swelling and elastic modulus of the swollen gels. Non-freezing water in several gels crosslinked with 1 ,I, 1 -trimethylolpropane trimethacrylate was analysed by differential scanning calorimetry (DSC). The proportion of non-freezing water in the gel relative to the overall water content was found to increase with increasing crosslink density. ZUSAMMENFASSUNG:2-Hydroxyethyl-methacrylat wurde durch Initiierung mit y-Strahlung in Masse mit zwei verschiedenen tetrafunktionellen Monomeren (Ethylenglycol-dimethacrylat und 1,2-Bis(acryloxymethyl)-tetrarnethyldisiloxan) und einem hexafunktionellen Monomeren (1,1,1-Trimethylolpropan-trimethacrylat) als Vernetzungsmittel copolymerisiert. Die erhaltenen Xerogele wurden anschlienend mit Wasser bis zum Erreichen der Gleichgewichtsquellung behandelt. Um die drei Vernetzungsmittel vergleichen zu konnen, wurde unter Berucksichtigung von Molmasse und Funktionalitat der Xerogele die theoretische Konzentration an Vernetzungsstellen zwischen 0,032 und 0,644 mol/l variiert. Die relative Hydrophobie der drei Vernetzungsmittel hat einen ausschlaggebenden EinfluB sowohl auf die Gleichgewichtsquellung als auch auf den Elastizitatsmodul der gequollenen Gele. Der Gehalt an nicht-einfrierbarem Wasser in mit 1,l ,l-Tkimethylol-

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Observations on the swelling behaviour of copolymeric hydrogels containing N‐vinyl‐2‐pyrrolidone

Cited by 19 publications

References 16 publications

Hydrophilic and hydrophobic copolymer systems based on acrylic derivatives of pyrrolidone and pyrrolidine

Hydrophilic and hydrophobic copolymer systems based on acrylic derivatives of pyrrolidone and pyrrolidine

Adsorption of Some Textile Dyes onto Crosslinked Poly(N-Vinylpyrrolidone)

Effect of crosslinking on the properties of poly(2‐hydroxyethyl methacrylate) hydrogels

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