Hydrolytic polycondensation of methylalkoxysilanes under pressure

2016 ◽  
Vol 65 (4) ◽  
pp. 1104-1109 ◽  
Author(s):  
A. A. Kalinina ◽  
D. N. Kholodkov ◽  
I. B. Meshkov ◽  
M. A. Pigaleva ◽  
I. V. Elmanovich ◽  
...  
Keyword(s):  
Hydrolytic Polycondensation

Sol-Gel Processing of Optical Fiber

1986 ◽  
Vol 88 ◽  
Author(s):  
M. E. Elias ◽  
A. M. Elias
Keyword(s):  
Optical Fiber ◽  
Transmission Loss ◽  
Amorphous Material ◽  
Sol Gel ◽  
Sintering Process ◽  
Exponential Time ◽  
Fiber Production ◽  
Hydrolytic Polycondensation ◽  
Gel Processing ◽  
Solid Glass

ABSTRACTA new method for optical fiber production is shown. Hydrolytic polycondensation of tetramethoxysilane using a low concentration of α-picoline, 1.56×10−3% in water, gives SiO2 gel which was dried at 22 °C to a transparent amorphous material.The densification process shows an exponential time dependence with a final value of 2.253 g/cm3 after 30 days. The specific surface area of the porous gel varies from 500 to 600 m2/g but pores are eliminated by the sintering process. Before sintering the gel, it is treated under an oxidizing atmosphere above 700 °C. At 1200 °C the pores are eliminated and a solid glass rod obtained.After the sintering process a fiber is obtained from the rod which shows a transmission loss as low as 5.5 dB/km at 840nm.

Synthesis of methacrylate-containing oligosilsesquioxanes via acidic hydrolytic polycondensation in the medium of methacrylate monomers

2017 ◽  
Vol 59 (3) ◽  
pp. 240-247 ◽  
Author(s):  
N. S. Bredov ◽  
Le Phu Soan ◽  
V. V. Kireev ◽  
A. A. Bykovskaya ◽  
I. B. Sokol’skaya ◽  
...  
Keyword(s):  
Hydrolytic Polycondensation ◽  
Methacrylate Monomers

Hydrolytic polycondensation of sodiumoxymethyl(dialkoxy)silanes as a method for producing linear poly[(sodiumoxy)methylsilsesquioxane]

2009 ◽  
Vol 51 (11-12) ◽  
pp. 457-464 ◽  
Author(s):  
M. A. Obrezkova ◽  
N. G. Vasilenko ◽  
V. D. Myakushev ◽  
A. M. Muzafarov
Keyword(s):  
Hydrolytic Polycondensation ◽  
Linear Poly

Synthesis of silanol-rich long-life polysilsesquioxane liquids by cosolvent-free hydrolytic polycondensation of organotrimethoxysilanes followed by aging

2016 ◽  
Vol 45 (7) ◽  
pp. 3151-3157 ◽  
Author(s):  
Arata Sakuragi ◽  
Yuta Igarashi ◽  
Koichi Kajihara ◽  
Kiyoshi Kanamura
Keyword(s):  
Binary Systems ◽  
Hydrolytic Polycondensation ◽  
Long Life ◽  
Viscosity Stability

Silanol-rich polysilsesquioxane liquids with long-term viscosity stability are formed in a facile manner from organotrimethoxysilane–water binary systems via aging.

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