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- W2900998012 abstract "We investigate the effect of short-chain poly(ethylene glycol) (PEG) graft density on the formation of methylcellulose (MC) fibrils at elevated temperatures. Thiol–ene click chemistry was used to systematically graft 800 and 2000 g/mol PEG onto the backbone of allylated MC, with a wide range of grafting densities from 0.7% to 33%. As determined from light scattering, grafting leads to an increase in the persistence length of this semiflexible copolymer, by as much as a factor of 10. Upon heating, SAXS and AFM studies show that fibril formation is suppressed at around 10% grafting density for shorter PEG grafts, corresponding to persistence lengths about ∼22 nm. For longer grafts fibril formation is suppressed at 7% grafting density, at around the same ∼22 nm persistence length. The radius of the fibrils increases with the square root of the persistence length of the chains, which is consistent with a theory for the radius of twisted chains. The ability to form networks at 80 °C is highly correlated to the..." @default.
- W2900998012 created "2018-11-29" @default.
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- W2900998012 date "2018-11-15" @default.
- W2900998012 modified "2023-09-30" @default.
- W2900998012 title "Effect of Poly(ethylene glycol) Grafting Density on Methylcellulose Fibril Formation" @default.
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- W2900998012 doi "https://doi.org/10.1021/acs.macromol.8b01899" @default.
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