Silicon-Containing Polymeric Materials

Thermochemistry of silicon - containing materials

A brief survey is given of the thermochemistry of a number of silicon-containing substances that are of interest in modern technology. Among those discussed are: silicalite (SiO2), silicon disulfide (SiS2), the crystalline and vitreous forms of silicon diselenide (SiSen), silicon sesquitelluride (Si2Te3), silicon nitride (Si3N4), and vanadium disilicide (VSi2).

C60-containing nanostructured polymeric materials with potential biomedical applications

Star-shaped polymers with a fullerene (C60) core and an unexpanded structure were successfully prepared by reaction of C60 with amino end-capped polyesters HxC60(NHPCLn)x and polyethers HxC60(NHPEGn)x, respectively. Upon irradiation of these C60-derivatives, a large amount of singlet oxygen was released. Compared to previously synthesized star-shaped azafulleroids with an expanded structure, th...

Polymeric triple-shape materials.

Shape-memory polymers represent a promising class of materials that can move from one shape to another in response to a stimulus such as heat. Thus far, these systems are dual-shape materials. Here, we report a triple-shape polymer able to change from a first shape (A) to a second shape (B) and from there to a third shape (C). Shapes B and C are recalled by subsequent temperature increases. Whe...

Polymeric Nanocomposite Materials

Polymeric Dielectric Materials

The definition for dielectric constant relates to the permittivity of the material (symbol use here ε). The permittivity expresses the ability of a material to polarise in response to an applied field. It is the ratio of the permittivity of the dielectric to the permittivity of a vacuum. Physically it means the greater the polarisation developed by a material in an applied field of given streng...