The effect of short polystyrene brushes grafted from graphene oxide on the behavior of miscible PMMA/SAN blends

0533162 - ÚMCH 2021 RIV GB eng J - Journal Article
Ilčíková, M. - Galeziewska, M. - Mrlik, M. - Osicka, J. - Masar, M. - Šlouf, Miroslav - Maslowski, M. - Kracalik, M. - Pietrasik, R. - Mosnáček, J. - Pietrasik, J.
The effect of short polystyrene brushes grafted from graphene oxide on the behavior of miscible PMMA/SAN blends.
Polymer. Roč. 211, 21 December (2020), s. 1-9, č. článku 123088. ISSN 0032-3861. E-ISSN 1873-2291
R&D Projects: GA TA ČR(CZ) TN01000008
Institutional support: RVO:61389013
Keywords : polymer blends * PMMA * SAN
OECD category: Polymer science
Impact factor: 4.430, year: 2020
Method of publishing: Limited access
https://www.sciencedirect.com/science/article/pii/S0032386120309137?via%3Dihub

A new concept of utilization of particle-polymer hybrids as multifunctional additives for polymer blends was introduced in this study. Graphene oxide particles with short densely grafted polystyrene brushes (GO-g-PS) were prepared by surface-initiated atom transfer radical polymerization (SI-ATRP). Melt rheology studies revealed that GO-g-PS suppressed the phase separation of miscible poly(methyl methacrylate)/poly(styrene-co-acrylonitrile) (PMMA/SAN) blends. The studies suggested specific interactions of GO-g-PS with the PMMA phase and this was confirmed based on calculations of activation energies of segmental relaxations by broadband dielectric spectroscopy (BDS). These unusual interactions of GO-g-PS with PMMA phase were assigned to the specific and precise architecture of the GO-g-PS particles as well as chemical nature of PS polymer brushes. The short chains of PMMA and PS provide miscibility originating from UCST behavior of PMMA/PS blend of short polymer chains. Additionally, BDS also revealed improved charge transport in PMMA/SAN blend in presence of GO-g-PS hybrid.
Permanent Link: http://hdl.handle.net/11104/0311697