Issue 10 Volume 41 May 16, 2003

derived from either a triol- or a diol-silsesquioxane. There is a need for the development of other incompletely condensed
silsesquioxanes useful in both thermoplastics and thermosets. The authors have been studying the isolation and chemistry of
a new cyclosiloxane containing four silanol functionalities. This tetrasilanol is tentatively assigned the structure shown which
is analogous to the known phenyl(2) and isopropyl(3) derivatives. Results of this experiment show that the hydrolytic
condensation of cyclopentyltrichlorosilane in refluxing 80\% acetone and water produces a high yield of the trisilanol shown,
a small amount of a fully condensed octamer, along with some resinous polymer. A change in the solvent composition can
result in significant changes to the product distribution. An attempt to produce a tetrasilanoldisiloxane, (C5H9) Si(OH)22O
analogous to a cyclohexyl derivative reported by Brown using about 10\% acetone and 90\% water yielded a mixture of
resinous products. However, the authors found that if the reaction was allowed to proceed for a longer time, a single major
product, 1, was produced along with smaller amounts of other partially condensed silsesquioxanes. This major product can
be isolated in about 50\% yield. NMR spectroscopy reveals it to be a high symmetry compound containing a single silanol
group per silicon. The three reasonable structures that fit all the available data are shown in Figure 3. Thus, a new completely
condensed silsesquioxane tetraol has been synthesized and characterized.
DTIC
Polymers; Composite Materials; Silicon Compounds
20030034591 Air Force Research Lab., Edwards AFB, CA, USA
Hybrid Inorganic/Organic Reactive Polymers for Severe Environment Protection
Phillips, Shawn; April 12, 2002; 14 pp.; In English
Contract(s)/Grant(s): AF Proj. 2303
Report No.(s): AD-A410241; AFRL-PR-ED-VG-2002-081; No Copyright; Avail: CASI; A03, Hardcopy
Significant advances in materials and processing technologies have made within AFRL/PRSM: demonstrated ceramic
char layer of POSS-insulation, synthesized POSS-Kapton (up to 20 wt% POSS), demonstrated significant (9x) atomic oxygen
survivability and formation of ceramic SiO2 layer. Basic (6.1) and Applications (6.2) research have been successfully
integrated in Air Force Propulsion Programs: successful technology transfer of POSS nanotechnology, POSS nanotechnology
on critical and high risk path for the Air Force.
DTIC
Environment Protection; Nanotechnology; Reactivity; Hybrid Structures; Polymers
20030034595 Air Force Research Lab., Edwards AFB, CA, USA
Molecularly Reinforced Polymers
Blanski, Rusty L.; Haddad, Tim; Viers, Brent; Gonzalez, Rene; Moore, Brian; February 22, 2002; 51 pp.; In English
Contract(s)/Grant(s): AF Proj. 4847
Report No.(s): AD-A410430; AFRL-PR-ED-VG-2002-037; No Copyright; Avail: CASI; A04, Hardcopy
No abstract available
DTIC
Polymers; Ablative Materials; Reinforcing Materials; Molecular Structure; Oligomers
20030034611 Air Force Research Lab., Edwards AFB, CA, USA
Effects on Processing by Drop-In Modifiers in Nano-Composite Polymers
Ruth, Patrick; Viers, Brent; Blanski, Rusty; Lee, Andre; April 16, 2002; 22 pp.; In English
Report No.(s): AD-A410334; AFRL-PR-ED-VG-2002-083; No Copyright; Avail: CASI; A03, Hardcopy
These viewgraphs discuss what POSS is, the anatomy of the molecule, blending into plastics, how it is chemically
incorporated into plastics, processing parameters, etc.
DTIC
Nanotechnology; Polymers; Composite Materials; Oligomers
20030034904 Department of the Navy, Washington, DC
Ceramic Coating Method
Li, Chou H., Inventor; 27 pp.; In English
Patent Info.: Filed: 8 Jun. 1995, Patented 2 Jul. 2002; US-Patent-Appl-SN-08482199
Report No.(s): AD-D020047; PATENT-6 413 589 B1; No Copyright; Avail: US Patent and Trademark Office
A method of coating a ceramic and bonding ceramic onto a substrate for practical uses over 630 degrees C. includes
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