Phase Separation of Aqueous Poly(diisopropylaminoethyl methacrylate) upon Heating

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Sammanfattning

Poly(diisopropylaminoethyl methacrylate) (PDPA) is a pH-and thermally responsive water-soluble polymer. This study deepens theunderstanding of its phase separation behavior upon heating. Phase separationupon heating was investigated in salt solutions of varying pH and ionicstrength. The effect of the counterion on the phase transition upon heating isclearly demonstrated for chloride-, phosphate-, and citrate-anions. Phaseseparation did not occur in pure water. The buffer solutions exhibited similarcloud points, but phase separation occurred in different pH ranges and withdifferent mechanisms. The solution behavior of a block copolymer comprisingpoly(dimethylaminoethyl methacrylate) (PDMAEMA) and PDPA wasinvestigated. Since the PDMAEMA and PDPA blocks phase separate withindifferent pH- and temperature ranges, the block copolymer forms micelle-likestructures at high temperature or pH

Originalspråkengelska
TidskriftLangmuir
Volym38
Nummer17
Sidor (från-till)5135-5148
Antal sidor14
ISSN0743-7463
DOI
StatusPublicerad - 3 maj 2022
MoE-publikationstypA1 Tidskriftsartikel-refererad

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