Synthesis of organic-inorganic hybrid gels by means of thiol-ene and azide-alkene reactions

Naofumi Naga, Hitomi Nagino, Hidemitsu Furukawa

研究成果: Article

8 引用 (Scopus)

抄録

Organic-inorganic hybrid gels have been synthesized from a multi-vinyl functional cyclic siloxane, 1,3,5,7-tetravinyltetramethylcyclotetrasiloxane (TVMCTS), or a cubic silsesquioxane, octavinyloctasilasesquioxane (PVOSS), and α,ω-dithiol compounds, 1,6-hexanedithiol (HDT), 1,10-decanedithiol (DDT), using thiol-ene reaction in toluene. The network structure of the resulting gels, mesh size and mesh size distribution, was quantitatively characterized by means of a scanning microscopic light scattering (SMILS). The gels obtained from TVMCTS-HDT formed homogeneous network structure with 1.5-1.6 nm mesh. Relaxation peaks derived from large clusters and/or micro gels were detected in the SMILS analysis of the TVMCTS-DDT, PVOSS-HDT, and PVOSS-DDT gels besides those from the small meshes. The organic-inorganic hybrid gels were also synthesized from TVMCTS, PVOSS with α,ω-diazide compounds, 1,6-hexanediazide (HDA), 1,10-decanediazide (DDA), using azide-alkene reaction in toluene. All the gels obtained with the azide-alkene reaction formed the homogeneous network structure. Enthalpy relaxation at the glass transition of the dried samples was detected by differential scanning calorimetry to study the network uniformity of the original gels. The gels synthesized by the azide-alkene reaction showed larger enthalpy than the gels synthesized by the thiol-ene reaction, indicating homogeneous network structure in the former gels.

元の言語English
ページ(範囲)2229-2238
ページ数10
ジャーナルJournal of Polymer Science, Part A: Polymer Chemistry
54
発行部数14
DOI
出版物ステータスPublished - 2016 7 15

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Azides
Alkenes
Sulfhydryl Compounds
Olefins
Gels
Toluene
Light scattering
Enthalpy
Siloxanes
Scanning
Glass transition
Differential scanning calorimetry

ASJC Scopus subject areas

  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

これを引用

Synthesis of organic-inorganic hybrid gels by means of thiol-ene and azide-alkene reactions. / Naga, Naofumi; Nagino, Hitomi; Furukawa, Hidemitsu.

:: Journal of Polymer Science, Part A: Polymer Chemistry, 巻 54, 番号 14, 15.07.2016, p. 2229-2238.

研究成果: Article

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AB - Organic-inorganic hybrid gels have been synthesized from a multi-vinyl functional cyclic siloxane, 1,3,5,7-tetravinyltetramethylcyclotetrasiloxane (TVMCTS), or a cubic silsesquioxane, octavinyloctasilasesquioxane (PVOSS), and α,ω-dithiol compounds, 1,6-hexanedithiol (HDT), 1,10-decanedithiol (DDT), using thiol-ene reaction in toluene. The network structure of the resulting gels, mesh size and mesh size distribution, was quantitatively characterized by means of a scanning microscopic light scattering (SMILS). The gels obtained from TVMCTS-HDT formed homogeneous network structure with 1.5-1.6 nm mesh. Relaxation peaks derived from large clusters and/or micro gels were detected in the SMILS analysis of the TVMCTS-DDT, PVOSS-HDT, and PVOSS-DDT gels besides those from the small meshes. The organic-inorganic hybrid gels were also synthesized from TVMCTS, PVOSS with α,ω-diazide compounds, 1,6-hexanediazide (HDA), 1,10-decanediazide (DDA), using azide-alkene reaction in toluene. All the gels obtained with the azide-alkene reaction formed the homogeneous network structure. Enthalpy relaxation at the glass transition of the dried samples was detected by differential scanning calorimetry to study the network uniformity of the original gels. The gels synthesized by the azide-alkene reaction showed larger enthalpy than the gels synthesized by the thiol-ene reaction, indicating homogeneous network structure in the former gels.

KW - click chemistry

KW - click reaction

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KW - organic-inorganic hybrid gel

KW - polymerization

KW - siloxane

KW - silsesquioxane; scanning microscopic light scattering

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