On the key role of SiO2@POSS hybrid filler in tailoring networking and interfaces in rubber nanocomposites

0486799 - ÚMCH 2019 RIV GB eng J - Článek v odborném periodiku
Redaelli, M. - D´Arienzo, M. - Brus, Jiří - Di Credico, B. - Geppi, M. - Giannini, L. - Matějka, Libor - Martini, F. - Panattoni, F. - Špírková, Milena - Šlouf, Miroslav - Scotti, R. - Morazzoni, F.
On the key role of SiO2@POSS hybrid filler in tailoring networking and interfaces in rubber nanocomposites.
Polymer Testing. Roč. 65, February (2018), s. 429-439. ISSN 0142-9418. E-ISSN 1873-2348
Grant ostatní: European Commission(XE) COST Action MP1202 HINT
Institucionální podpora: RVO:61389013
Klíčová slova: rubber nanocomposites * hybrid materials * POSS
Obor OECD: Polymer science
Impakt faktor: 2.943, rok: 2018

The present study provides a comprehensive investigation at the micro and nanoscale of the interface between hybrid SiO2@POSS nanofiller, where silica nanoparticles (NPs) and POSS nanocages are intimately interconnected, and Styrene Butadiene Rubber (SBR). SEM and AFM inspection and, more in depth, solid state 1H NMR revealed a remarkable fraction of rigid rubber close to the SiO2@POSS surfaces, which increases with the curing temperature. Instead, a reduced amount of immobilized rubber was detected for SBR/SiO2+POSS nanocomposites, obtained by simply mixing SBR, SiO2 and POSS. The results allowed us to propose a model for the network formation in C-SBR/SiO2@POSS. This is based on the progressive activation by dicumylperoxide (DCP) of the methacryl functionalities of POSS nanounits which, being closely connected to SiO2 NPs in SiO2@POSS, promote crosslinking in proximity of the filler surfaces, and lead to the generation of a tight network strongly bonded to the rubber chains.
Trvalý link: http://hdl.handle.net/11104/0282581