Phosphazene Backbones for Siloxanes and Organic Polymers

1999 ◽  
Vol 576 ◽  
Author(s):  
Guido Kickelbick ◽  
Peter J. Miller ◽  
Krzysztof Matyjaszewski
Keyword(s):  
Sol Gel ◽  
Building Blocks ◽  
Thermoplastic Elastomers ◽  
Chain Extension ◽  
Organic Polymers ◽  
Silicon Alkoxide ◽  
Dsc Measurements ◽  
Sol Gel Process ◽  
A Chain ◽  
Tga And Dsc

ABSTRACT2,2,4,4,6,6-Hexachlorocyclotriphosphazene was modified by nucleophilic substitution to obtain building blocks for organic polymers and siloxane networks. 2,2,4,4,6,6-Hexachlorocyclotriphosphazene was substituted with functional groups to enable atom transfer radical polymerization (ATRP) as well as silicon alkoxide as precursors for the sol-gel process. ATRP was carried out with methyl acrylate followed by a chain extension with iso-bornyl acrylate to obtain new thermoplastic elastomers. The sol-gel process was carried out with acid, base and fluoride catalysts and the resulting materials were compared by TGA and DSC measurements.

Fiber Drawing from Silicon Alkoxide Solutions in the Sol–Gel Process

1987 ◽  
Vol 16 (9) ◽  
pp. 1763-1766 ◽  
Author(s):  
Sumio Sakka ◽  
Hiromitsu Kozuka
Keyword(s):  
Sol Gel ◽  
Fiber Drawing ◽  
Silicon Alkoxide ◽  
Sol Gel Process

A Solid State Multinuclear Magnetic Resonance Study of the Sol-Gel Process using Polysilicate Precursors

1986 ◽  
Vol 73 ◽  
Author(s):  
W. G. Klemperer ◽  
V. V. Mainz ◽  
D. M. Millar
Keyword(s):  
Solid State ◽  
Magnetic Resonance ◽  
Sol Gel ◽  
Building Blocks ◽  
Magnetic Resonance Study ◽  
Solvent Content ◽  
Molecular Building Blocks ◽  
Nmr Study ◽  
Sol Gel Process ◽  
Nmr Techniques

ABSTRACTA solid state multinuclear NMR study of the sol-gel process was performed using the molecular building blocks tetramethoxysilane, hexamethoxydisiloxane, octamethoxytrisiloxane and octamethoxyoctasilsesquioxane as precursor monomers. Water content, solvent content, and hydrolysis/condensation processes were monitored using 17O, 13C, and 29Si FT, FTMAS and CPMAS NMR techniques.

Fluorescence Spectra of 1-Naphthol During the Sol-Gel Process of a Mixed Aluminum-Silicon Alkoxide (Si : Al = 94 : 6)

1992 ◽  
Vol 65 (3) ◽  
pp. 720-727 ◽  
Author(s):  
Tsuneo Fujii ◽  
Toshiaki Mabuchi ◽  
Hiroshi Kitamura ◽  
Osamu Kawauchi ◽  
Nobuaki Negishi ◽  
...  
Keyword(s):  
Fluorescence Spectra ◽  
Sol Gel ◽  
Silicon Alkoxide ◽  
Sol Gel Process ◽  
Aluminum Silicon

An Ultrasonic Monitoring of the Sol-Gel Process in Silicon Alkoxide Solutions

1995 ◽  
Vol 34 (Part 1, No. 5B) ◽  
pp. 2575-2578
Author(s):  
Mami Matsukawa ◽  
Isao Nagai ◽  
Yuko Tanaka
Keyword(s):  
Sol Gel ◽  
Ultrasonic Monitoring ◽  
Silicon Alkoxide ◽  
Sol Gel Process

scholarly journals Styrenated Oil Synthesis with Cyclic Carbonate Functional Groups on Polystyrene Segment

Polymers ◽  
2021 ◽  
Vol 13 (14) ◽  
pp. 2343
Author(s):  
Eser Bingöl ◽  
Ahmet Tuncer Erciyes
Keyword(s):  
Functional Groups ◽  
Linseed Oil ◽  
Sol Gel ◽  
Cyclic Carbonate ◽  
Polymer Backbone ◽  
Oil Synthesis ◽  
Partial Glycerides ◽  
Sol Gel Process ◽  
Dsc Analyses ◽  
Tga And Dsc

In this study, an oil-modified copolymer of 4-[(prop-2-en-1-yloxy)methyl]-1,3-dioxolan- 2-one (AGC) with styrene was synthesized, and the resulting copolymer (OBMI-St-AGC) was silane functionalized by inserting (3-aminopropyl) triethoxysilane (APTES) into the polymer backbone. OBMI-St-AGC was prepared by using an oil-based macroinitiator (OBMI) obtained by the esterification of linseed oil partial glycerides (PGs) with 4,4-azobis-4-cyanopentanoyl chloride (ACPC). In the characterization, FTIR, 1H NMR, TGA, and DSC analyses were applied. The silane-functionalized copolymer (OBMI-St-AGC-APTES) was crosslinked through the sol–gel process, and its crosslinked structure was determined.

scholarly journals Chemistry And Applications Of Inorganic-Organic Polymers (Organically Modified Silicates)

1986 ◽  
Vol 73 ◽  
Author(s):  
H. Schmidt ◽  
B. Seiferling
Keyword(s):  
Sol Gel ◽  
Inorganic Materials ◽  
Organic Polymers ◽  
Polymeric Networks ◽  
Organically Modified Silicates ◽  
Sol Gel Process ◽  
Organically Modified ◽  
Polycondensation Process ◽  
Application Potential ◽  
Inorganic Organic Polymers

ABSTRACTThe combination of inorganic polymeric networks with organic components leads to inorganic-organic polymers. A convenient method for the introduction of organic radials into an inorganic backbone is the use of organosubstituted silico esters in a polycondensation process. This leads to≡Si-O-Si≡ network containing materials, so-called organically modified silicates (ORMOSILs). For the synthesis of the inorganic backbone, in opposition to the high temperature preparation of non-metallic inorganic materials like ceramics, “soft chemistry” methods have to be applied in order to preserve organic groupings to be incorporated. Therefore, the sol-gel process is a suitable technique [1–5]. A review over basic synthesis principles and chemical methods, their effect on special material properties and the application potential will be given.

The crystallization of thin-film ceramics

1992 ◽  
Vol 50 (1) ◽  
pp. 338-339
Author(s):  
J.M. Schwartz ◽  
L.F. Francis ◽  
L.D. Schmidt ◽  
P.S. Schabes-Retchkiman
Keyword(s):  
Thin Films ◽  
Grain Size ◽  
Sol Gel ◽  
Processing Route ◽  
Small Areas ◽  
Ceramic Thin Films ◽  
Complex Shapes ◽  
Sol Gel Process ◽  
Ceramic Precursors ◽  
Crystalline Ceramic

Ceramic thin films and coatings are of interest for electrical, optical, magnetic and thermal barrier applications. Critical for improved properties in thin films is the development of specific microstructures during processing. To this end, the sol-gel method is advantageous as a versatile processing route. The sol-gel process involves depositing a solution containing metalorganic or colloidal ceramic precursors onto a substrate and heating the deposited layer to form a crystalline or non-crystalline ceramic coating. This route has several advantages, including the ability to create tailored microstructures and properties, to coat large or small areas, simple or complex shapes, and to more easily prepare multicomponent ceramics. Sol-gel derived coatings are amorphous in the as-deposited state and develop their crystalline structure and microstructure during heat-treatment. We are particularly interested in studying the amorphous to crystalline transformation, because many key features of the microstructure such as grain size and grain size distribution may be linked to this transformation.

Epitaxial Growth of Sr0.3Ba0.7Nb2O6 Thin Films Prepared by Sol-Gel Process

1999 ◽  
Vol 606 ◽  
Author(s):  
Keishi Nishio ◽  
Jirawat Thongrueng ◽  
Yuichi Watanabe ◽  
Toshio Tsuchiya
Keyword(s):  
Thin Film ◽  
Thin Films ◽  
Epitaxial Growth ◽  
Raw Materials ◽  
Substrate Surface ◽  
Sol Gel ◽  
Tungsten Bronze ◽  
Monomethyl Ether ◽  
Tetragonal Tungsten Bronze ◽  
Sol Gel Process

AbstructWe succeeded in the preparation of strontium-barium niobate (Sr0.3Ba0.7Nb2O6 : SBN30)that have a tetragonal tungsten bronze type structure thin films on SrTiO3 (100), STO, or La doped SrTiO3 (100), LSTO, single crystal substrates by a spin coating process. LSTO substrate can be used for electrode. A homogeneous coating solution was prepared with Sr and Ba acetates and Nb(OEt)5 as raw materials, and acetic acid and diethylene glycol monomethyl ether as solvents. The coating thin films were sintered at temperature from 700 to 1000°C for 10 min in air. It was confirmed that the thin films on STO substrate sintered above 700°C were in the epitaxial growth because the 16 diffraction spots were observed on the pole figure using (121) reflection. The <130> and <310> direction of the thin film on STO were oriented with the c-axis in parallel to the substrate surface. However, the diffraction spots of thin film on LSTO substrate sintered at 700°C were corresponds to the expected pattern for (110).

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