https://nova.newcastle.edu.au/vital/access/ /manager/Index en-au 5 https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:33530 Wed 14 Nov 2018 16:20:31 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:15326 Sat 24 Mar 2018 08:26:35 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:30152 Sat 24 Mar 2018 07:34:31 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:48241 Sat 11 Mar 2023 12:51:24 AEDT ]]> https://nova.newcastle.edu.au/vital/access/ /manager/Repository/uon:42771 2MA) and poly(2-(diethylamino)ethyl methacrylate) (PDEA), as well as a P(MEO₂MA-co-DEA) copolymer brush of 90:10 mol% composition has been examined. PMEO₂MA is a thermoresponsive polymer with a lower critical solution temperature of ~28 °C, PDEA a weak polybase with an apparent pK_a of ~7.5, while the copolymer brush exhibits both pH and temperature responsive behaviour. Brushes were synthesised using surface initiated ARGET ATRP. The effect of temperature at low and high pH in the presence of different electrolytes on the thickness of the P(MEO₂MA-co-DEA) 90:10 mol% brush was tracked with ellipsometry and the polymer volume fraction profile was elucidated with neutron reflectometry. The effect of each electrolyte on the copolymer brush conformation as the temperature changes could be switched by changing the pH from low (charged DEA segments) to high (uncharged DEA segments). The overall behaviour of the copolymer in each salt was PDEA-like at low pH, and MEO₂MA-like at high pH. At low pH a reverse Hofmeister effect was observed, while at high pH a direct Hofmeister effect was observed.]]> Fri 02 Sep 2022 10:32:17 AEST ]]>