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

POLYMER

卷:211

Article

Ilcikova, Marketa^1,2  Galeziewska, Monika¹  Mrlik, Miroslav³  Osicka, Josef³  Masar, Milan³  Slouf, Miroslav⁴  Maslowski, Marcin¹  Kracalik, Milan⁵  Pietrasik, Robert⁶  Mosnacek, Jaroslav^2,7  Pietrasik, Joanna¹ 

[1] Lodz Univ Technol, Dept Chem, Inst Polymer & Dye Technol, Stefanowskiego 12-16, PL-90924 Lodz, Poland

[2] Slovak Acad Sci, Polymer Inst, Dubravska Cesta 9, Bratislava 84541, Slovakia

[3] Tomas Bata Univ Zlin, Univ Inst, Ctr Polymer Syst, Trida T Bati 5678, Zlin 76001, Czech Republic

[4] Czech Acad Sci, Inst Macromol Chem, Heyrovskeho Namesti 2, Prague 16206 6, Czech Republic

[5] Johannes Kepler Univ Linz, Inst Polymer Sci, Altenberger Str 69, A-4040 Linz, Austria

[6] Lodz Univ Technol, Inst Mat Sci & Engn, Stefanowskiego 1-15, PL-90924 Lodz, Poland

[7] Slovak Acad Sci, Ctr Adv Mat Applicat, Dubravska Cesta 9, Bratislava 84511, Slovakia

关键词: Polymer blends;    PMMA;    SAN;    Graphene oxide;    Polymer brushes;    SI-ATRP;    Rheology;    Nanocomposites;   

DOI  :  10.1016/j.polymer.2020.123088

来源: Elsevier

【 摘 要 】

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.

【 授权许可】

Free