Gusakova K. Synthesis, structure and properties of porous cross-linked film-forming polycyanurates

The object of the research is generation of novel film-forming porous materials with controlled porosity based on thermostable cross-linked polymers and establishment of the dependences of synthesis conditions and method of pore formation on structure and physical-chemical behavior. The aim of the research lies in the designing of the ways of synthesis of porous cross-linked film-forming polycyanurates (PCNs) using porogens of different chemical structure or radiation technologies and ascertainment of the relationships between synthesis conditions, composition, structure and properties of porous PCNs obtained. Routes of synthesis of novel cross-linked PCN-containing film materials with controlled porosity and physical-chemical characteristics inherent to individual PCN-networks were elaborated. Novel nanoporous cross-linked PCNs and hybrid PCN-networks by in situ polycyclotrimerization from dicyanate ester of bisphenols E or A with porogens of various chemical nature were synthesized and characterized for the first time. For the first time the dependences of synthesis conditions, composition, chemical structure of porogens on porous structure were established; the influence of porosity on structure, morphological peculiarities and on thermal, dielectric and other physical-chemical properties was determined. For the first time method of obtaining of film nanoporous PCNs, modified with poly(oxytetramethylene glycol) or poly(e-caprolactone) by a-irradiation with subsequent track etching was developed, their structure and characteristics were defined. The established relationships are the basis for synthesis of nanoporous PCN-networks, including modified ones, with controlled porous structure and regulable physical-chemical behavior.