Tertiary-Amine-Containing Thermo- and pH-Sensitive Hydrophilic ABA Triblock Copolymers: Effect of Different Tertiary Amines on Thermally Induced Sol–Gel Transitions

Langmuir ◽  
2014 ◽  
Vol 30 (9) ◽  
pp. 2541-2550 ◽  
Author(s):  
Daniel M. Henn ◽  
Roger A. E. Wright ◽  
Jeremiah W. Woodcock ◽  
Bin Hu ◽  
Bin Zhao
Keyword(s):  
Tertiary Amine ◽  
Triblock Copolymers ◽  
Sol Gel ◽  
Ph Sensitive ◽  
Tertiary Amines ◽  
Thermally Induced

Sol–gel derived mesoporous silica films using amphiphilic triblock copolymers

2003 ◽  
Vol 332 (1-3) ◽  
pp. 199-206 ◽  
Author(s):  
Nobuaki Kitazawa ◽  
Hideyoshi Namba ◽  
Masami Aono ◽  
Yoshihisa Watanabe
Keyword(s):  
Mesoporous Silica ◽  
Triblock Copolymers ◽  
Sol Gel ◽  
Silica Films

Micellization of pH-sensitive poly(butadiene)-block -poly(2 vinylpyridine)-block -poly(ethylene oxide) triblock copolymers: Complex formation with anionic surfactants

2017 ◽  
Vol 134 (38) ◽  
pp. 45313 ◽  
Author(s):  
Leonard Ionut Atanase ◽  
Jean-Philippe Lerch ◽  
Simona Caprarescu ◽  
Camelia Elena Iurciuc Tincu ◽  
Gerard Riess
Keyword(s):  
Complex Formation ◽  
Ethylene Oxide ◽  
Anionic Surfactants ◽  
Triblock Copolymers ◽  
Ph Sensitive ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Tertiary amine-catalyzed and direct synthesis of α-chloroalkanesulfonylhydrazines from azodicarboxylates and sulfonyl chlorides

2016 ◽  
Vol 14 (21) ◽  
pp. 4918-4926 ◽  
Author(s):  
Bingnan Zhou ◽  
Jiaxi Xu
Keyword(s):  
Tertiary Amine ◽  
Direct Synthesis ◽  
Tertiary Amines ◽  
Sulfonyl Chlorides

α-Chloroalkanesulfonylhydrazines were synthesized directly and efficiently from alkanesulfonyl chlorides and dialkyl azodicarboxylates under the catalysis of tertiary amines.

scholarly journals Synthesis and Investigation of Thermo-Induced Gelation of Partially Cross-Linked Poly-2-isopropyl-2-oxazoline in Aqueous Media

Polymers ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 698 ◽  
Author(s):  
Alina Amirova ◽  
Serafim Rodchenko ◽  
Mikhail Kurlykin ◽  
Andrey Tenkovtsev ◽  
Illia Krasnou ◽  
...  
Keyword(s):  
Self Assembly ◽  
Sol Gel ◽  
Aqueous Media ◽  
Water Soluble ◽  
Thermally Induced ◽  
Thermosensitive Gel ◽  
Step Procedure ◽  
Physical Gel ◽  
Sol Gel Transition ◽  
Gel Transition

Water-soluble, partially cross-linked poly-2-isopropyl-2-oxazoline combining the properties of chemical and physical gels was synthesized by a two-step procedure. Thermally induced sol-gel transition in its aqueous solution was studied by rheology, light scattering, and turbidimetry. It was demonstrated that the synthesized product is bimodal; it consists of linear and cross-linked components. The cross-linked components are responsible for the gelation, while the linear ones abate the viscosity growth. Heating the solution above the phase transition temperature leads to the self-assembly of the particles into a physical gel. The combination of chemical and physical cross-linking was found to be a prospective route for thermosensitive gel development.

Controlled Hierarchical Pore Structures in Ethylene-Bridged Polysilsesquioxane Gels

2003 ◽  
Vol 788 ◽  
Author(s):  
Yuki Kobayashi ◽  
Kazuki Nakanishi ◽  
Kazuyuki Hirao
Keyword(s):  
Phase Separation ◽  
Ethylene Glycol ◽  
Triblock Copolymers ◽  
Sol Gel ◽  
Poly Ethylene Glycol ◽  
Bridged Polysilsesquioxane ◽  
Sol Gel Transition ◽  
Poly Ethylene ◽  
Hierarchical Pore ◽  
Gel Transition

ABSTRACTFormation of hierarchical macropores and mesopores in ethylene-bridged polysilsesquioxane sol-gel systems via concurrent sol-gel transition and phase separation induced by the incorporation of supramolecular templats has been investigated. A series of poly(ethylene-glycol)-poly(propyleneglycol)- poly(ethyleneglycol) triblock copolymers, EOPOEOs, have been employed as supramolecular templates, while 1,2-bis(trimethoxysilyl)ethane was used as a polysilsesquioxane source. Successful combination of templated mesopores and well-defined macropores due to phase-separation has been found in the system with EOPOEOs having 70 PO units and respective 20 EO units. Although similar macroporous morphology has been obtained for all the EOPOEOs with EO chain longer or shorter than 20 units, the optimum composition for the co-continuous macropores and that for templated mesopores deviated from each other, resulting in the failure of producing hierarchical macropores and mesopores.

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