Solvent-Responsive Glass Transition Behavior of Polyelectrolyte Complexes

Hongwei Li, Dmitry Tolmachev, Piotr Batys, Maria Sammalkorpi, Jodie L. Lutkenhaus*

*Tämän työn vastaava kirjoittaja

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

5 Lataukset (Pure)

Abstrakti

Polyelectrolyte complexes (PECs) have attracted considerable attention owing to their unique physicochemical properties and potential applications as smart materials. Herein, the glass transitions of PECs solvated with varying alcohols are investigated in poly(diallyldimethylammonium)/poly(acrylic acid) (PDADMA/PAA) complexes by using modulated differential scanning calorimetry (MDSC). Solvents with one or two hydroxyl groups are selected to examine the effect of PAA-solvent interactions on the glass transition temperature (Tg). Except for glycerol, all alcohol solvents yield PECs with detectable Tg’s and plasticization behavior. Furthermore, a linear relationship for 1/Tg and the natural logarithm of the number of hydroxyl groups to intrinsic ion pair ratio [ln(nhydroxyl/nintrinsic-ion-pair)] is found. This result is significant because prior work demonstrated the relationship only for water and no other solvents. All-atom molecular dynamics (MD) simulations analyze the ability of the solvent to form hydrogen bonds via the solvent’s OH groups to the PAA, revealing that the solvent molecule size and available hydroxyl groups govern the change in the glass transition. Overall, the clear dependence of a PEC’s glass transition on the solvent’s chemical structure provides a simple guideline for predicting their relationship.

AlkuperäiskieliEnglanti
Sivut292-303
Sivumäärä12
JulkaisuMacromolecules
Vuosikerta58
Numero1
Varhainen verkossa julkaisun päivämäärä23 jouluk. 2024
DOI - pysyväislinkit
TilaJulkaistu - 14 tammik. 2025
OKM-julkaisutyyppiA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

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