Critical interaction strength for surfactant-induced mesomorphic structures in polymer-surfactant systems

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

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Critical interaction strength for surfactant-induced mesomorphic structures in polymer-surfactant systems. / Ruokolainen, Janne; Torkkeli, Mika; Serimaa, Ritva; Vahvaselkä, Sakari; Saariaho, Mika; ten Brinke, Gerrit; Ikkala, Olli.

julkaisussa: Macromolecules, Vuosikerta 29, Nro 20, 1996, s. 6621-6628.

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

Harvard

Ruokolainen, J, Torkkeli, M, Serimaa, R, Vahvaselkä, S, Saariaho, M, ten Brinke, G & Ikkala, O 1996, 'Critical interaction strength for surfactant-induced mesomorphic structures in polymer-surfactant systems', Macromolecules, Vuosikerta. 29, Nro 20, Sivut 6621-6628. https://doi.org/10.1021/ma951800a

APA

Vancouver

Author

Ruokolainen, Janne ; Torkkeli, Mika ; Serimaa, Ritva ; Vahvaselkä, Sakari ; Saariaho, Mika ; ten Brinke, Gerrit ; Ikkala, Olli. / Critical interaction strength for surfactant-induced mesomorphic structures in polymer-surfactant systems. Julkaisussa: Macromolecules. 1996 ; Vuosikerta 29, Nro 20. Sivut 6621-6628.

Bibtex - Lataa

@article{120b02e895b74a6fba1a0d10a54595c7,
title = "Critical interaction strength for surfactant-induced mesomorphic structures in polymer-surfactant systems",
abstract = "The critical interaction strength to induce mesomorphic structures in flexible polymers by complexing with surfactants is determined by using surfactants with different hydrogen-bonding strengths. Two essential requirements have to be satisfied: (i) the association has to be strong enough, otherwise the structure dissociates, (ii) The polar-nonpolar repulsion has to be sufficiently strong to induce microphase separation. If the latter requirement is not satisfied, but the association is sufficiently strong, a characteristic comb polymer-like SAXS peak will still be present in the homogeneous melt state. To address these issues experimentally, poly(4-vinylpyridine) (P4VP) was combined with different classes of hydrogen-bonding surfactants: alkyl aromatic alcohols, alkyl carboxylic acids, alkyl aliphatic alcohols, and alkyl aliphatic amines. FTIR, SAXS, WAXS, and optical microscopy demonstrate that alkyl aromatic alcohols, such as 1-dodecyl 3,4,5-trihydroxybenzoate yield mesomorphic structures at not too high a temperature. Alkyl carboxylic acids are somewhat less effective. In the melt state, the SAXS data still show a peak, but because no birefringence could be found, the peak is attributed to block copolymer-like concentration fluctuations in an otherwise homogeneous state. Aliphatic alkyl alcohols yield still weaker hydrogen bonding. In the melt the short alkyl aliphatic alcohol surfactants form a homogeneous mixture with P4VP, but a SAXS peak is no longer observed. The longer ones macrophase separate. Both the alkyl carboxylic acids and the short alkyl aliphatic alcohols partly macrophase separate at lower temperatures due to crystallization.",
keywords = "mesomorphic order, phase separation, polymer, specific interaction, surfactant, mesomorphic order, phase separation, polymer, specific interaction, surfactant, mesomorphic order, phase separation, polymer, specific interaction, surfactant",
author = "Janne Ruokolainen and Mika Torkkeli and Ritva Serimaa and Sakari Vahvaselk{\"a} and Mika Saariaho and {ten Brinke}, Gerrit and Olli Ikkala",
year = "1996",
doi = "10.1021/ma951800a",
language = "English",
volume = "29",
pages = "6621--6628",
journal = "Macromolecules",
issn = "0024-9297",
publisher = "AMERICAN CHEMICAL SOCIETY",
number = "20",

}

RIS - Lataa

TY - JOUR

T1 - Critical interaction strength for surfactant-induced mesomorphic structures in polymer-surfactant systems

AU - Ruokolainen, Janne

AU - Torkkeli, Mika

AU - Serimaa, Ritva

AU - Vahvaselkä, Sakari

AU - Saariaho, Mika

AU - ten Brinke, Gerrit

AU - Ikkala, Olli

PY - 1996

Y1 - 1996

N2 - The critical interaction strength to induce mesomorphic structures in flexible polymers by complexing with surfactants is determined by using surfactants with different hydrogen-bonding strengths. Two essential requirements have to be satisfied: (i) the association has to be strong enough, otherwise the structure dissociates, (ii) The polar-nonpolar repulsion has to be sufficiently strong to induce microphase separation. If the latter requirement is not satisfied, but the association is sufficiently strong, a characteristic comb polymer-like SAXS peak will still be present in the homogeneous melt state. To address these issues experimentally, poly(4-vinylpyridine) (P4VP) was combined with different classes of hydrogen-bonding surfactants: alkyl aromatic alcohols, alkyl carboxylic acids, alkyl aliphatic alcohols, and alkyl aliphatic amines. FTIR, SAXS, WAXS, and optical microscopy demonstrate that alkyl aromatic alcohols, such as 1-dodecyl 3,4,5-trihydroxybenzoate yield mesomorphic structures at not too high a temperature. Alkyl carboxylic acids are somewhat less effective. In the melt state, the SAXS data still show a peak, but because no birefringence could be found, the peak is attributed to block copolymer-like concentration fluctuations in an otherwise homogeneous state. Aliphatic alkyl alcohols yield still weaker hydrogen bonding. In the melt the short alkyl aliphatic alcohol surfactants form a homogeneous mixture with P4VP, but a SAXS peak is no longer observed. The longer ones macrophase separate. Both the alkyl carboxylic acids and the short alkyl aliphatic alcohols partly macrophase separate at lower temperatures due to crystallization.

AB - The critical interaction strength to induce mesomorphic structures in flexible polymers by complexing with surfactants is determined by using surfactants with different hydrogen-bonding strengths. Two essential requirements have to be satisfied: (i) the association has to be strong enough, otherwise the structure dissociates, (ii) The polar-nonpolar repulsion has to be sufficiently strong to induce microphase separation. If the latter requirement is not satisfied, but the association is sufficiently strong, a characteristic comb polymer-like SAXS peak will still be present in the homogeneous melt state. To address these issues experimentally, poly(4-vinylpyridine) (P4VP) was combined with different classes of hydrogen-bonding surfactants: alkyl aromatic alcohols, alkyl carboxylic acids, alkyl aliphatic alcohols, and alkyl aliphatic amines. FTIR, SAXS, WAXS, and optical microscopy demonstrate that alkyl aromatic alcohols, such as 1-dodecyl 3,4,5-trihydroxybenzoate yield mesomorphic structures at not too high a temperature. Alkyl carboxylic acids are somewhat less effective. In the melt state, the SAXS data still show a peak, but because no birefringence could be found, the peak is attributed to block copolymer-like concentration fluctuations in an otherwise homogeneous state. Aliphatic alkyl alcohols yield still weaker hydrogen bonding. In the melt the short alkyl aliphatic alcohol surfactants form a homogeneous mixture with P4VP, but a SAXS peak is no longer observed. The longer ones macrophase separate. Both the alkyl carboxylic acids and the short alkyl aliphatic alcohols partly macrophase separate at lower temperatures due to crystallization.

KW - mesomorphic order

KW - phase separation

KW - polymer

KW - specific interaction

KW - surfactant

KW - mesomorphic order

KW - phase separation

KW - polymer

KW - specific interaction

KW - surfactant

KW - mesomorphic order

KW - phase separation

KW - polymer

KW - specific interaction

KW - surfactant

UR - http://www.scopus.com/inward/record.url?scp=0030242939&partnerID=8YFLogxK

U2 - 10.1021/ma951800a

DO - 10.1021/ma951800a

M3 - Article

VL - 29

SP - 6621

EP - 6628

JO - Macromolecules

JF - Macromolecules

SN - 0024-9297

IS - 20

ER -

ID: 4687697