Hydrolytic polycondensation of methyl-?-(3,4-epoxycyclohexyl)-ethyldiethoxysilane

1967 ◽  
Vol 16 (12) ◽  
pp. 2547-2551
Author(s):  
G. P. Bochkareva ◽  
K. A. Andrianov ◽  
M. A. Golubenko
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.

Preparation and Properties of Inorganic-Organic Hybrids From Vinyland 3-Methacryloxypropyltrimethoxysilane

1999 ◽  
Vol 576 ◽  
Author(s):  
N. Takamura ◽  
T. Gunji ◽  
Y. Abe
Keyword(s):  
Functional Group ◽  
Carbon Chain ◽  
Carbon Chain Length ◽  
Organic Substrates ◽  
Coating Films ◽  
Free Standing ◽  
Pencil Hardness ◽  
Hydrolytic Polycondensation ◽  
Molecular Weights ◽  
Degree Of Condensation

ABSTRACTThe organic-inorganic polymer hybrids consisting of carbon-carbon and siloxane chains were prepared by radical polymerization of vinyltrimethoxysilane (VTS) and 3-methacryloxypropyltrimethoxysilane (MAS) followed by hydrolytic polycondensation. Polyvinyltrimethoxysilane (PVTS) and poly(3-methacryloxypropyltrimethoxysilane) (S-PMA) with various molecular weights Mw=3900–64800 were prepared by polyaddition of VTS and MAS, respectively. PVTS and S-PMA provided transparent and flexible free-standing films and coating films. With increasing carbon-carbon chain length, the elasticity of the films increased, while the tensile strength and Young's modulus decreased. The adhesive strength of the coating films on organic substrates was particularly dependent on the solubility parameter, polarity and crystallinity of each substrate. The pencil-hardness of coating films was clearly increased with increasing degree of condensation of sila-functional group in PVTS and S-PMA.

Sign in / Sign up

Export Citation Format

Share Document