Conformational characteristics of regioselectively PEG/PS-grafted cellulosic bottlebrushes in solution: cross-sectional structure and main-chain stiffness

Cellulosic bottlebrushes with polystyrene (PS) and poly(ethylene glycol) (PEG) side chains at the O-6 O-2,3 positions, respectively (PEG-PS-cellulose), were synthesized characterized in diluted solution to reveal second structure of heterografted bottlebrushes. The regioselectivity degree substitution evaluated by 1H- 13C-nuclear magnetic resonance spectroscopy size-exclusion chromatography (SEC). cross-sectional PEG-PS-cellulose was from radius gyration determined small angle X-ray scattering technique as a function molecular weight PS chain. As result, found show core-shell-corona structure, which PEG formed homogeneous shell layer surrounding cellulosic core outer segments an corona layer. stiffness parameter (λ−1) main chain analyzed SEC–multiangle light along Kratky-Porod wormlike model. In comparison previously reported bottlebrush position, it is suggested that observed increase λ−1 increasing mainly derived interaction among located layer, while position effectively suppressed internal rotation regioselectively possessing (PEG-PS-cellulose) synthesized, its secondary dilute investigated SAXS SEC-MALS. relationship between mean squared (〈Sc2〉) (MWPS) showed has cross section. dependency main-chain on MWPS discussed basis interactions well restricted