Nanogels and dendritic molecules combined to form a smart nanomaterial

ROSSO, ANABELLA P.; MARTINELLI, MARISA

EUROPEAN POLYMER JOURNAL

PERGAMON-ELSEVIER SCIENCE LTD

Año: 2022 vol. 162

0014-3057

endritic thermo-responsive polymer-based NGs were prepared following the precipitation methodology. PVCL-based dendritic NGs are reported with the incorporation of a dendritic building block, and with different percentages of N, N ´-methylenebisacrylamide (BIS) as crosslinker agent. The dendritic moiety employed were di-tert-butyl-4-acryloylamine 4-[2-(tert-butoxy- carbonyl)ethyl]heptanodioate (ABA) and its hydrolyzed compound with peripheral carboxylic groups (ABC). In order to analyze the chemical structure, NGs were characterized using infrared microscopy. Hydrodynamic diameter and phase transition temperature were determined by dynamic light scattering. Phase transition temperature was also measured by UV?vis spectroscopy. Measures of electrophoretic mobility completed the characterization of the NGs. The phase transition temperature and Dh values were regulated by the percentage of crosslinker and the identity, quantity, steric effect, and polar character of the dendron. The pola