Styrene-divinylbenzene copolymers. II: The conservation of porosity in styrene-divinylbenzene copolymer matrices and derived ion-exchange resins

H. Hilgen, G.J. de Jong, W.L. Sederel

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Abstract

The collapse of pores in styrene-divinylbenzene copolymers and corresponding ion-exchange resins was studied during the removal of solvating liquids. The process can be followed in a most simple way by measuring the volume of the bead-shaped copolymers upon drying. Other parameters observed during drying were the apparent density and incidently the internal surface. The collapse of pores is considered to be a result of cohesional forces when solvated polymer chains are approaching each other by loss of solvent. The effect will thus be more pronounced in gel-type networks than in porous ones. In porous networks, the effect will be stronger in smaller pores than in larger ones. It is shown that crosslinks, increasing the rigidity of the structures, will favor the conservation of porosity. In ion-exchange resins the pore stability is best when the material is in its lowest state of hydration. Generally, the collapse of pores is a reversible process. The collapsed material can in most cases be reswollen by the proper choice of solvent.
Original languageEnglish
Pages (from-to)2647-2654
JournalJournal of applied polymer science
Volume19
Issue number10
DOIs
Publication statusPublished - 1975

Fingerprint

divinyl benzene
Ion Exchange Resins
Styrene
Ion exchange resins
Conservation
Drying
Copolymers
Porosity
Rigidity
Hydration
Polymers
Gels
Liquids

Keywords

  • IR-70804

Cite this

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title = "Styrene-divinylbenzene copolymers. II: The conservation of porosity in styrene-divinylbenzene copolymer matrices and derived ion-exchange resins",
abstract = "The collapse of pores in styrene-divinylbenzene copolymers and corresponding ion-exchange resins was studied during the removal of solvating liquids. The process can be followed in a most simple way by measuring the volume of the bead-shaped copolymers upon drying. Other parameters observed during drying were the apparent density and incidently the internal surface. The collapse of pores is considered to be a result of cohesional forces when solvated polymer chains are approaching each other by loss of solvent. The effect will thus be more pronounced in gel-type networks than in porous ones. In porous networks, the effect will be stronger in smaller pores than in larger ones. It is shown that crosslinks, increasing the rigidity of the structures, will favor the conservation of porosity. In ion-exchange resins the pore stability is best when the material is in its lowest state of hydration. Generally, the collapse of pores is a reversible process. The collapsed material can in most cases be reswollen by the proper choice of solvent.",
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author = "H. Hilgen and {de Jong}, G.J. and W.L. Sederel",
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journal = "Journal of applied polymer science",
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Styrene-divinylbenzene copolymers. II : The conservation of porosity in styrene-divinylbenzene copolymer matrices and derived ion-exchange resins. / Hilgen, H.; de Jong, G.J.; Sederel, W.L.

In: Journal of applied polymer science, Vol. 19, No. 10, 1975, p. 2647-2654.

Research output: Contribution to journalArticleAcademic

TY - JOUR

T1 - Styrene-divinylbenzene copolymers. II

T2 - The conservation of porosity in styrene-divinylbenzene copolymer matrices and derived ion-exchange resins

AU - Hilgen, H.

AU - de Jong, G.J.

AU - Sederel, W.L.

PY - 1975

Y1 - 1975

N2 - The collapse of pores in styrene-divinylbenzene copolymers and corresponding ion-exchange resins was studied during the removal of solvating liquids. The process can be followed in a most simple way by measuring the volume of the bead-shaped copolymers upon drying. Other parameters observed during drying were the apparent density and incidently the internal surface. The collapse of pores is considered to be a result of cohesional forces when solvated polymer chains are approaching each other by loss of solvent. The effect will thus be more pronounced in gel-type networks than in porous ones. In porous networks, the effect will be stronger in smaller pores than in larger ones. It is shown that crosslinks, increasing the rigidity of the structures, will favor the conservation of porosity. In ion-exchange resins the pore stability is best when the material is in its lowest state of hydration. Generally, the collapse of pores is a reversible process. The collapsed material can in most cases be reswollen by the proper choice of solvent.

AB - The collapse of pores in styrene-divinylbenzene copolymers and corresponding ion-exchange resins was studied during the removal of solvating liquids. The process can be followed in a most simple way by measuring the volume of the bead-shaped copolymers upon drying. Other parameters observed during drying were the apparent density and incidently the internal surface. The collapse of pores is considered to be a result of cohesional forces when solvated polymer chains are approaching each other by loss of solvent. The effect will thus be more pronounced in gel-type networks than in porous ones. In porous networks, the effect will be stronger in smaller pores than in larger ones. It is shown that crosslinks, increasing the rigidity of the structures, will favor the conservation of porosity. In ion-exchange resins the pore stability is best when the material is in its lowest state of hydration. Generally, the collapse of pores is a reversible process. The collapsed material can in most cases be reswollen by the proper choice of solvent.

KW - IR-70804

U2 - 10.1002/app.1975.070191001

DO - 10.1002/app.1975.070191001

M3 - Article

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EP - 2654

JO - Journal of applied polymer science

JF - Journal of applied polymer science

SN - 0021-8995

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ER -