Swelling, Elasticity and Spatial Inhomogeneity of Poly(N,N-dimethylacrylamide) Hydrogels Formed at Various Polymer Concentrations
The equilibrium swelling degree, modulus of elasticity and the spatial inhomogeneity of poly(N,N‐dimethylacrylamide) (PDMAAm) hydrogels were investigated over the entire range of the initial monomer concentration. The degree of dilution of the networks after their preparation was denoted by ν 20, th...
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| Veröffentlicht in: | Macromolecular chemistry and physics 2004-04, Vol.205 (6), p.814-823 |
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| container_title | Macromolecular chemistry and physics |
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| creator | Gundogan, Nermin Okay, Oguz Oppermann, Wilhelm |
| description | The equilibrium swelling degree, modulus of elasticity and the spatial inhomogeneity of poly(N,N‐dimethylacrylamide) (PDMAAm) hydrogels were investigated over the entire range of the initial monomer concentration. The degree of dilution of the networks after their preparation was denoted by ν 20, the volume fraction of crosslinked polymer after the gel preparation. The linear swelling ratio of the gels increased linearly with increasing ν 20. Depending on the value of ν 20, three different gel regimes were observed: (1) For ν 20 |
| doi_str_mv | 10.1002/macp.200300174 |
| format | Article |
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Effective crosslink density νe of the hydrogels shown as a function of ν 20.</description><identifier>ISSN: 1022-1352</identifier><identifier>EISSN: 1521-3935</identifier><identifier>DOI: 10.1002/macp.200300174</identifier><language>eng</language><publisher>Weinheim: WILEY-VCH Verlag</publisher><subject>Applied sciences ; elasticity ; Exact sciences and technology ; gels ; inhomogeneity ; light scattering ; N-dimethylacrylamide ; Organic polymers ; Physicochemistry of polymers ; poly(N ; poly(N,N‐dimethylacrylamide) ; Polymerization ; Preparation, kinetics, thermodynamics, mechanism and catalysts</subject><ispartof>Macromolecular chemistry and physics, 2004-04, Vol.205 (6), p.814-823</ispartof><rights>Copyright © 2004 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim</rights><rights>2004 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c4214-78095a02fac82b24d48132a8f254d0d10a097e452f440c558bd104c9f59c020d3</citedby><cites>FETCH-LOGICAL-c4214-78095a02fac82b24d48132a8f254d0d10a097e452f440c558bd104c9f59c020d3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1002%2Fmacp.200300174$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1002%2Fmacp.200300174$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,780,784,1416,27922,27923,45572,45573</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=15733237$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Gundogan, Nermin</creatorcontrib><creatorcontrib>Okay, Oguz</creatorcontrib><creatorcontrib>Oppermann, Wilhelm</creatorcontrib><title>Swelling, Elasticity and Spatial Inhomogeneity of Poly(N,N-dimethylacrylamide) Hydrogels Formed at Various Polymer Concentrations</title><title>Macromolecular chemistry and physics</title><addtitle>Macromol. Chem. Phys</addtitle><description>The equilibrium swelling degree, modulus of elasticity and the spatial inhomogeneity of poly(N,N‐dimethylacrylamide) (PDMAAm) hydrogels were investigated over the entire range of the initial monomer concentration. The degree of dilution of the networks after their preparation was denoted by ν 20, the volume fraction of crosslinked polymer after the gel preparation. The linear swelling ratio of the gels increased linearly with increasing ν 20. Depending on the value of ν 20, three different gel regimes were observed: (1) For ν 20 < 0.3, increasing ν 20 decreases the extent of cyclization during crosslinking so that the effective crosslink density of gels increases with rising ν 20. (2) For 0.3 < ν 20 < 0.7, increasing ν 20 reduces the accessibility of the pendant vinyl groups during crosslinking due to steric hindrance at high polymer concentrations. As a result, the effective crosslink density of gels decreases with increasing ν 20. (3) For ν 20 > 0.7, the modulus of elasticity increases sharply with increasing ν 20 due to the increasing extent of chain entanglements in this high concentration regime. Static light scattering measurements on the gels show that the degree of spatial gel inhomogeneity in PDMAAm gels attains a maximum value at ν 20 = 0.06. The appearance of a maximum as well as the ν 20‐dependence of scattered light intensities from gels was successfully reproduced by the theory proposed by Panyukov and Rabin.
Effective crosslink density νe of the hydrogels shown as a function of ν 20.</description><subject>Applied sciences</subject><subject>elasticity</subject><subject>Exact sciences and technology</subject><subject>gels</subject><subject>inhomogeneity</subject><subject>light scattering</subject><subject>N-dimethylacrylamide</subject><subject>Organic polymers</subject><subject>Physicochemistry of polymers</subject><subject>poly(N</subject><subject>poly(N,N‐dimethylacrylamide)</subject><subject>Polymerization</subject><subject>Preparation, kinetics, thermodynamics, mechanism and catalysts</subject><issn>1022-1352</issn><issn>1521-3935</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2004</creationdate><recordtype>article</recordtype><recordid>eNqFkM1P3DAQxaOKSuWj1559qQQSWcZfTXJEK1iQlu2q29KjNdgOuHXilR0EOfKf4-0i4NbLeDR-vzf2K4ovFCYUgJ10qNcTBsABaCU-FLtUMlryhsud3ANjJeWSfSr2UvoDADU01W7xtHqw3rv-9piceUyD024YCfaGrNY4OPTksr8LXbi1vd3chJYsgx8PF8eL0rjODnejRx1z6ZyxR-RiNDGLfSLnIXbWEBzINUYX7tM_sLORTEOvbT_E7B_6dFB8bNEn-_nl3C9-nZ_9nF6U8--zy-npvNSCUVFW-b0SgbWoa3bDhBE15QzrlklhwFDA_B8rJGuFAC1lfZNnQjetbDQwMHy_mGx9dQwpRduqdXQdxlFRUJsA1SZA9RpgBr5ugTUmjb6N2GuX3ihZcc54lXXNVvfgvB3_46quTqfL9zvKLevSYB9fWYx_1beKV1L9XszUfPbjWjYg1Yw_A5lIkiw</recordid><startdate>200404</startdate><enddate>200404</enddate><creator>Gundogan, Nermin</creator><creator>Okay, Oguz</creator><creator>Oppermann, Wilhelm</creator><general>WILEY-VCH Verlag</general><general>WILEY‐VCH Verlag</general><general>Wiley</general><scope>BSCLL</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>200404</creationdate><title>Swelling, Elasticity and Spatial Inhomogeneity of Poly(N,N-dimethylacrylamide) Hydrogels Formed at Various Polymer Concentrations</title><author>Gundogan, Nermin ; Okay, Oguz ; Oppermann, Wilhelm</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c4214-78095a02fac82b24d48132a8f254d0d10a097e452f440c558bd104c9f59c020d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2004</creationdate><topic>Applied sciences</topic><topic>elasticity</topic><topic>Exact sciences and technology</topic><topic>gels</topic><topic>inhomogeneity</topic><topic>light scattering</topic><topic>N-dimethylacrylamide</topic><topic>Organic polymers</topic><topic>Physicochemistry of polymers</topic><topic>poly(N</topic><topic>poly(N,N‐dimethylacrylamide)</topic><topic>Polymerization</topic><topic>Preparation, kinetics, thermodynamics, mechanism and catalysts</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Gundogan, Nermin</creatorcontrib><creatorcontrib>Okay, Oguz</creatorcontrib><creatorcontrib>Oppermann, Wilhelm</creatorcontrib><collection>Istex</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><jtitle>Macromolecular chemistry and physics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Gundogan, Nermin</au><au>Okay, Oguz</au><au>Oppermann, Wilhelm</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Swelling, Elasticity and Spatial Inhomogeneity of Poly(N,N-dimethylacrylamide) Hydrogels Formed at Various Polymer Concentrations</atitle><jtitle>Macromolecular chemistry and physics</jtitle><addtitle>Macromol. Chem. Phys</addtitle><date>2004-04</date><risdate>2004</risdate><volume>205</volume><issue>6</issue><spage>814</spage><epage>823</epage><pages>814-823</pages><issn>1022-1352</issn><eissn>1521-3935</eissn><abstract>The equilibrium swelling degree, modulus of elasticity and the spatial inhomogeneity of poly(N,N‐dimethylacrylamide) (PDMAAm) hydrogels were investigated over the entire range of the initial monomer concentration. The degree of dilution of the networks after their preparation was denoted by ν 20, the volume fraction of crosslinked polymer after the gel preparation. The linear swelling ratio of the gels increased linearly with increasing ν 20. Depending on the value of ν 20, three different gel regimes were observed: (1) For ν 20 < 0.3, increasing ν 20 decreases the extent of cyclization during crosslinking so that the effective crosslink density of gels increases with rising ν 20. (2) For 0.3 < ν 20 < 0.7, increasing ν 20 reduces the accessibility of the pendant vinyl groups during crosslinking due to steric hindrance at high polymer concentrations. As a result, the effective crosslink density of gels decreases with increasing ν 20. (3) For ν 20 > 0.7, the modulus of elasticity increases sharply with increasing ν 20 due to the increasing extent of chain entanglements in this high concentration regime. Static light scattering measurements on the gels show that the degree of spatial gel inhomogeneity in PDMAAm gels attains a maximum value at ν 20 = 0.06. The appearance of a maximum as well as the ν 20‐dependence of scattered light intensities from gels was successfully reproduced by the theory proposed by Panyukov and Rabin.
Effective crosslink density νe of the hydrogels shown as a function of ν 20.</abstract><cop>Weinheim</cop><pub>WILEY-VCH Verlag</pub><doi>10.1002/macp.200300174</doi><tpages>10</tpages></addata></record> |
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| ispartof | Macromolecular chemistry and physics, 2004-04, Vol.205 (6), p.814-823 |
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| source | Wiley Online Library Journals Frontfile Complete |
| subjects | Applied sciences elasticity Exact sciences and technology gels inhomogeneity light scattering N-dimethylacrylamide Organic polymers Physicochemistry of polymers poly(N poly(N,N‐dimethylacrylamide) Polymerization Preparation, kinetics, thermodynamics, mechanism and catalysts |
| title | Swelling, Elasticity and Spatial Inhomogeneity of Poly(N,N-dimethylacrylamide) Hydrogels Formed at Various Polymer Concentrations |
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