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Technology Stocks : LUMM - Lumenon Innovative Lightwave Technology Inc.
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To: fibrehound* who wrote (1743)5/11/2000 11:36:00 AM
From: fibrehound*  Read Replies (2) of 2484
 
Geezer
I talked to a Lumenon Technology specialists the other day in response to the O-H C-H bond issue. While I'm not at liberty to explain how Lumenon has solved this OLD problem here is a HINT. Lumenon has solved this bugger with multiple leading edge techniques.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Novel nonhydrolytic sol-gel route to low-OH- and CH-containing
organic-inorganic composites,

A new synthesis route to organic-inorganic composites
with low OH- and CH-content has been developed. Thus
methacrylate- modified chlorosilanes were either
homocondensed or cocondensed with fluoroalkyl-modified
chlorosilanes by a non- hydrolytic reaction with
2-methyl-2-propanol under formation of an inorganic
network and hydrogen chloride and tertiary butyl
chloride as well. Remaining chlorosilane groups were
reacted by a second alcohol treatment to obtain
air-stable, highly condensed, and low OH-containing
sols. The condensation was followed by
$+29$/Si-NMR-spectroscopy, showing T$+2$/- content of
up to 60% and T$+3$/ content of up to 35% for
trichlorosilanes and D$+2$/-content of more than 90%
for dichlorosilanes respectively. The OH-content, which
was estimated by FT-IR-spectroscopy, was lower than 10%
referring to materials prepared by the conventional
aqueous sol-gel process. For further decrease of the
CH-content copolymerization with fluorinated
methacrylates was investigated. After addition of a
photoinitiator transparent bulk materials with a
diameter of 1 cm and a length of 1.5 cm were obtained
by photopolymerization in closed UV-transparent
containers using a Beltron$+r$/ UV apparatus with a low
pressure Hg-Xe lamp. NIR-absorbance measurements were
carried out and optical losses of bulk materials were
determined. Cocondensed and copolymerized materials
show low optical losses of 0.12 dB/cm at 1300 nm and
0.33 dB/cm at 1550 nm. !30
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