There has been great interest in the past few decades in hybrid inorganic-organic nanocomposites given that inorganic nanoparticles dispersed in a neat polymer have been shown to enhance physical, thermomechanical, and processing properties of the polymer. In particular, silicones with nano-fillers are useful for various applications, including coatings, composites, and biocompatible materials. We are interested in preparing polysiloxanes with well dispersed hexagonal boron nitride nanomaterials, which are known for their excellent thermal properties. For this purpose, organoboron functionalized polysiloxanes were prepared to optimize dispersion and suspension in neat resins and cured samples. The selection of the functional groups on the polysiloxane was used to optimize the thermal and mechanical properties of these materials. The polysiloxanes were cured via hydrosilylation with varying amounts of boron nitride nanomaterials. Details of this process, thermal and mechanical properties, and nanoparticle-polymer interactions will be presented.

Modifying polysiloxanes to improve compatibility with boron nitride nanomaterials

ACS Spring 2022

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