Film Formation of High T_g Latex Using Hydroplasticization: Explanations from NMR Relaxometry.

ABSTRACT: The film formation of acrylic latex dispersions, containing different amounts of carboxylic acid functional groups by the incorporation of methacrylic acid (MAA), was studied with GARField ¹H NMR at various relative humidities (RH). Polymer particles with glass-transition temperatures in the range from 26 to 50 °C formed films at room temperature because of hydroplasticization. It was found that with an increased drying rate due to lower RH, the evaporation flux of water was limited by the latex polymer. Only in the second stage of drying this phenomenon was more obvious with increasing MAA content. ¹H NMR relaxometry was used to study the change of hydrogen mobilities during film formation and hardening of the films. This showed that the drying rate itself had no imp

SUBMITTER: Voogt B 

PROVIDER: S-EPMC6764025 | biostudies-literature | 2019 Sep

REPOSITORIES: biostudies-literature