Stabilność termiczna i palność elastomerów oraz materiałów elastomerowych.

W pracy przedstawiono nieopisane dotąd w literaturze przedmiotu, wyniki systematycznych badań wpływu budowy chemicznej makrocząsteczek elastomerów, budowy ich sieci przestrzennej oraz składu kompozycji elastomerowych na właściwości termiczne, palność oraz zagrożenie pożarowe wytworzonych z nich kompozytów i nanokompozytów. Wyniki uzyskanych badań pozwoliły na ustalenie wyraźnej zależności pomiędzy stabilnością termiczną uzyskanych materiałów elastomerowych a ich palnością.The work present the results of the systematic studies, not described yet in the subject literature, concerning the effects of chemical structure of elastomers, their spatial network structure and composition of elastomeric blends on the thermal properties, flammability and fi re hazard of the composites and nanocomposites made of them. The results of the studies allowed to establish a clear relationship between the thermal stability of the elastomeric materials obtained and their flammability

Thermal properties of diene elastomers

The paper presents the results of investigating the effect of the macromolecule chemical structure and the spatial network structure of butadiene (BR), butadiene-styrene (SBR) and butadiene-acrylonitrile (NBR) rubbers on their thermal properties. The rubbers were cross-linked by the conventional method by means of dicumyl peroxide or sulfur as well as by the non-conventional way using iodoform (CH3I). The rubber and their vulcanizates were assessed by the derivatographic method (under air) and by means of differential scanning calorimetry (DSC) under inert gas. The thermal cross-linking degree of the polydienes and the efficiency of the cross-linking processes, dependent on both the chemical structure of elastomer macromolecules and their spatial network structure were determined. The cross-linking of elastomers with iodoform changes the thermal properties of polymers, significantly increasing their glass transition temperature during both sample heating and cooling, which results from the increase in mutual interaction of macromolecules connected with their modification with iodine compounds