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Article: Stress evolution in a phase-separating polymeric gel

TitleStress evolution in a phase-separating polymeric gel
Authors
Issue Date2010
PublisherInstitute of Physics Publishing. The Journal's web site is located at http://www.iop.org/journals/msmse
Citation
Modelling And Simulation In Materials Science And Engineering, 2010, v. 18 n. 2, article no. 025002 How to Cite?
AbstractA polymer network can swell tremendously to form a gel which is typically transparent at room temperature. Upon temperature quenching, however, the gel can undergo phase separation and become opaque. We revisit and formulate the dynamics of phase separation of gels through co-evolution of polymer volume fraction and left Cauchy-Green tensor; both are physical and measurable quantities. A hybrid Fourier spectral method and an isotropic finite difference method is proposed to solve the evolution equations, and the scheme is verified to be efficient for either an isotropically or anisotropically swollen gel. For the isotropic swelling gel, a percolating network structure, where the shrunken phase encloses the solvent-rich phase, is formed during phase separation. With the formation of network structure, an inhomogeneous stress field builds up within the network and evolves simultaneously with concentration modulation. The effective stress levels in the common vertices of several shrunken phases are relatively low while the network segments between two vertices constitute the high stress region. A plausible stress-supporting mechanism is proposed to explain the formation of network structure and the phase-inversion phenomenon. © 2010 IOP Publishing Ltd.
Persistent Identifierhttp://hdl.handle.net/10722/157051
ISSN
2015 Impact Factor: 1.859
2015 SCImago Journal Rankings: 1.091
ISI Accession Number ID
Funding AgencyGrant Number
Natural Science Foundation of China10872157
Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry
Funding Information:

This research is supported by the Natural Science Foundation of China through grant No 10872157, and by the Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry.

References

 

DC FieldValueLanguage
dc.contributor.authorZhou, Jen_US
dc.contributor.authorHuang, Gen_US
dc.contributor.authorLi, Men_US
dc.contributor.authorSoh, AKen_US
dc.date.accessioned2012-08-08T08:45:07Z-
dc.date.available2012-08-08T08:45:07Z-
dc.date.issued2010en_US
dc.identifier.citationModelling And Simulation In Materials Science And Engineering, 2010, v. 18 n. 2, article no. 025002en_US
dc.identifier.issn0965-0393en_US
dc.identifier.urihttp://hdl.handle.net/10722/157051-
dc.description.abstractA polymer network can swell tremendously to form a gel which is typically transparent at room temperature. Upon temperature quenching, however, the gel can undergo phase separation and become opaque. We revisit and formulate the dynamics of phase separation of gels through co-evolution of polymer volume fraction and left Cauchy-Green tensor; both are physical and measurable quantities. A hybrid Fourier spectral method and an isotropic finite difference method is proposed to solve the evolution equations, and the scheme is verified to be efficient for either an isotropically or anisotropically swollen gel. For the isotropic swelling gel, a percolating network structure, where the shrunken phase encloses the solvent-rich phase, is formed during phase separation. With the formation of network structure, an inhomogeneous stress field builds up within the network and evolves simultaneously with concentration modulation. The effective stress levels in the common vertices of several shrunken phases are relatively low while the network segments between two vertices constitute the high stress region. A plausible stress-supporting mechanism is proposed to explain the formation of network structure and the phase-inversion phenomenon. © 2010 IOP Publishing Ltd.en_US
dc.languageengen_US
dc.publisherInstitute of Physics Publishing. The Journal's web site is located at http://www.iop.org/journals/msmseen_US
dc.relation.ispartofModelling and Simulation in Materials Science and Engineeringen_US
dc.titleStress evolution in a phase-separating polymeric gelen_US
dc.typeArticleen_US
dc.identifier.emailSoh, AK:aksoh@hkucc.hku.hken_US
dc.identifier.authoritySoh, AK=rp00170en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1088/0965-0393/18/2/025002en_US
dc.identifier.scopuseid_2-s2.0-75149158850en_US
dc.identifier.hkuros171048-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-75149158850&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume18en_US
dc.identifier.issue2en_US
dc.identifier.spagearticle no. 025002-
dc.identifier.epagearticle no. 025002-
dc.identifier.isiWOS:000275898800002-
dc.publisher.placeUnited Kingdomen_US
dc.identifier.scopusauthoridZhou, J=7405548714en_US
dc.identifier.scopusauthoridHuang, G=35422337800en_US
dc.identifier.scopusauthoridLi, M=15059210100en_US
dc.identifier.scopusauthoridSoh, AK=7006795203en_US

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