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Improved Fire- and Smoke-Resistant Materials for Commercial Aircraft Interiors A Proceedings (1995) / Chapter Skim
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Chapter 10. An Overview of Inorganic and Organometallic Polymers
Pages 151-164

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From page 151...
... Organic polymers thermally decompose to volatile materials that burn; the presence of inorganics increases thermal stability, reduces inflammability of the volatiles, or increases nonvolatile residues. Organic oolvmers degrade when exposed to ultraviolet and higher energy radiation; norgan~cs are less susceptible to radiative degradation.
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From page 152...
... , compounds containing Si-O bonds in the polymer backbone, are the oldest and largest class of inorganic-organometallic polymers of commercial significance (Rochow, 1987~. Worldwide production amounts to about 0.5 million metric tons, with commercial value exceeding $3.5 billion.
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From page 153...
... . TABLE 1 Some Properties and Major Uses of Polysiloxanes Properties Uses Low glass transition temperature Low thermal coefficient of viscosity High thermal stability Oxidative stability Hydrophobicity-lipophilicity Elasticity Low surface energy Biological inertness Photochemical stability Low dielectric constant Heat exchange fluids Dielectric fluids Antifoams Lubricants Polishes RTV and HTV rubbers Chromatographic resins Refractory materials Damping fluids Biomedical applications R Isis 1 1 ~ nil n n R H
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From page 154...
... D. i N29~300 0C SiC \<~/ CHe t(CH3~2Sit SiC-based ceramic materials offer a wide variety of physical properties that include extreme hardness, high structural and thermal stability, and future potential as coating materials for electronic and optical devices.
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From page 155...
... Significantly, ceramic materials from their pyrolysis have high char yield. The combination of solubility and hydrolytic and thermal stability of these polycarbosilanes offers opportunities to tailor properties by using appropriate preceramic polymer blends.
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From page 156...
... ~-R' ~ Pe En IN = CAN = I my l' = N -IF = N I P = No OR OR ~oR oR TABLE 2 Applications of Polyphosph~enes Elastomers Ionic electrical conductors Membranes Water repellents Nonburning textile fibers Foam heat and sound insulators Hydrocarbon solvent-resistant O-r~gs and gaskets Immobilized enzymes Controlled drug-release agents Hydrogels for prostheses and soft-tissue applications Liquid crystalline polymers for nonlinear optical properties Ceramics Although other inorganic and semi-inorganic polymers containing phosphorus (e.g., phory} resins, poly~alkylene phosphates) , polycarbophosphazenes)
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From page 157...
... Marte! Ze~in OTHER TYPES OF INORGANIC AND ORGANOMETALLIC POLYMERS Boron- and Almnmu~n-Contammg Polymers Polyborylamines and Polyborazines R R kB``N'B``N' R' R' R = Hydrocarbon 1 157 Hi H `,,N B\,N: N B x H H 2a /
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From page 158...
... Related materials, which contain diamine groups, have resulted in BN-like fibers. Although these sub spaces were studied extensively in the 1960s and 1970s, further development of them has essentially ceased due to the difficulty and cost of producing the parent carboranes.
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From page 159...
... ,N So Nit x In 1975, the spotlight was turned onto S-N polymers because of their remarkable metallike appearance and their properties, for example, malleability, electrical conductivity, oriented epitaxial structure, optical polar~zability, and superconductivity (at 0.3 °C) (Mikulski et al., 1975~.
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From page 160...
... The major limitations in further development of home- and heteroannular materials results from low solubility, low-to-moderate molecular weights, and lack of mechanical properties for applications. Recently, pendant-type water-soluble polymers, such as polyaspartamide-bound ferrocene compounds, have been prepared and characterized.
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From page 161...
... Polymers Phthalocyanines are planar macrocyclic rings composer' of aromatic groups and nitrogen atoms capable of tetracoordina~cion with a meW or Adenoid. Polycondensation of a monomeric Riot derivative, where M = Si, Ge, or Sn, leads to one-dimensional stacked me~Ioxy chain macromolecules with unusual physical and dynamic-mechanical properties.
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From page 162...
... ACS Symposium Series 360. Washington, D.C.: American Chemical Society.
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From page 163...
... ACS Symposium Series 360. Washington, D.C.: American Chemical Society.
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From page 164...
... ACS Advances in Chemistry Series 224. Washington, D.C.: American Chemical Society.
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Key Terms

  • organic polymers
  • thermal stability
  • silicon carbide
  • polymer backbone
  • compounds containing

  • ceramic materials
  • inorganic polymers
  • molecular weight
  • englewood cliffs
  • amorphous magnetic

  • stannsequioxanes exist
  • fluids biomedical
  • synthetic control
  • radiative degradation
  • structural types

  • ceased due
  • molecular mews
  • stronger bonds
  • carbide fibers
  • metric tons

  • carbosilane dendritic
  • glass transition
  • silicon dioxide
  • macroscopic properties
  • sub spaces

  • planar macrocyclic
  • raw materials
  • oriented epitaxial
  • commercial value
  • contain metals


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