Copolymers polyhedral oligomeric silsesquioxanes

Mantz, R.A., Jones, P.F., Chaffee, K.P., Lichtenhan, J.D., and Gilman, J.W., Thermolysis of polyhedral oligomeric silsesquioxane (POSS) micromers and POSS-siloxane copolymers, Chem Mater. 1996, 8, 1250. 

A methacrylic monomer with polyhedral oligomeric silsesquioxanes (FM-28) as a pendant group can be polymerized with 1-24 (X = Br)/CuBr/L-32 in toluene (.MJMn = 1.14).326 Block and star copolymers of this partially inorganic monomer with MA and nBA are expected to function as new hybrid materials. 

Perfluoroalkyl groups are also introduced into block copolymers with methacrylates, acrylates, and styrene (B-46 to B-53), which can be synthesized in scCC>2 or in the bulk.95,315 Amphiphilic block copolymers based on glycopolymer segments (B-54 and B-55) are synthesized by copper-catalyzed polymerizations.321,322 Comonomers with a polyhedral oligomeric silsesquioxane unit afforded hybrid polymers between organic and inorganic components (B-56 and B-57).326... 

Zheng, L., Farris, R.J. and Coughlin, E.B. (2001). Novel Polyolefin Nanocomposites Synthesis and Characterizations of Metallocene-Catalyzed Polyolefin Polyhedral Oligomeric Silsesquioxane Copolymers, Macromol, 34(23) 8034-8039. 

Recently, ROMP of silicon-containing norbornenes was used for creation of inorganic-organic hybrid materials. Particularly, incorporation of the polyhedral oligomeric silsesquioxanes molecule (POSS) in norbornene and its ROMP copolymerization with norbornene or norbornene-dicarboxylic acid gave POSS-containing copolymers [208, 209],... 

Zheng, L. Kasi, R.M. Farris, R.J. Coughlin, E.B. Synthesis and thermal properties of hybrid copolymers of syndiotactic polystyrene and polyhedral oligomeric silsesquioxane. J. Polym. Sci. A, Polym. Chem. 2002, 40, 885-891. 

There are numerous examples of polymers in which the metal or metalloid is present in the sidechain of the macromolecule. Polymer 57 is an organometaUic polystyrene is which the chromium tricarbonyl moieties are 7t-coordinated to some of the benzene rings attached to polymer backbone. The polynorbomene copolymer (58) incorporates polyhedral oligomeric silsesquioxane moieties into its sidechains." ... 

The synthesis of polyhedral oligomeric silsesquioxane-siloxane copolymers has been achieved by Lichtenhan and coworkers. " " " Reaction of the hydroxyl groups on monomer 150 with iw-dimethylaminosilanes and siloxanes (151) resulted in the formation of polymers such as 152 using the methodology described in Scheme 36. " " This polymer had a glass transition at 23°C and a melting transition at 114°C. On the basis of GPC measurements, this polymer had a degree of polymerization of 21. 

Chapter 5 is a review of polyhedral oligomeric silsesquioxanes (POSS), hybrid POSS-organic copolymers, and POSS resin nanocomposites. Although silsesquioxanes have been known since tiie 1960s, only recently, through controlled synthesis and purification, have their structure and unique properties been determined and their useful applications been explored. This chapter is complemented by a discussion of the synthesis and properties of silica- and silsesquioxanes-containing polymer nanohybrids in Chapter 6. Chapter 7 involves a review of the preparation and characterization of siloxane-based polyviologens, polyurethanes, and divinylben-zene elastomers. 

Polyhedral Oligomeric Silsesquioxane (POSS) Polymers, Copolymers, and Resin Nanocomposites... 

FIG U RE 2 The novel generation cardiovascular stents coating with special nanocomposite polymers like POSS-PCU (polyhedral oligomeric silsesquioxane and copolymer caibonate-urea urethane trade named UCL-NanoTM) has been developed specifically to capture oxide nitrogen and EPC specific antibodies (factor of endothelialization) simultaneously. 

POSS PCU (Polyhedral oligomeric silsesquioxane and copolymer carbonate-urea urethane... 

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