Conjugated polymers nanoparticles as new visible light polymerization initiators

CAGNETTA, GONZALO; GALLASTEGUI ANTONELLA.; SPADA, RAMIRO M.; PONZIO, RODRIGO A.; PREVITALI, CARLOS M.; PALACIOS, RODRIGO E.; CHESTA, CARLOS A.; GÓMEZ, MARÍA L.

Mar del Plata

Congreso; XVI SIMPOSIO LATINOAMERICANO DE POLÍMEROS Y XIV CONGRESO IBEROAMERICANO DE POLÍMEROS; 2018

Instituto de Investigaciones en Ciencia y Tecnología de Materiales, INTEMA (UNMdP-CONICET).

INTRODUCTION. We report a study on the use of conjugated polymer nanoparticles (NPC) as photoinitiators of vinyl polymerization. To this end, aqueous suspensions of NPC of poly (9,9-dioctylfluorene-alt-benzothiadiazole) (F8BT) and poly (9,9-dioctylfluorene) (PFO) were synthesized and characterized. These NPCs are highly biocompatible, show significant absorption even a very low concentration (< 5 ppm) and can be excited in a wide spectral range (300-600 nm).1 Upon excitation, the NPCs undergo efficient intra and inter Singlet- Singlet energy transfer processes useful for amplifying the generation of free radical of typical photoinitiators systems (Eosin Y/ triethanolamine, methylene blue/triethanolamine, etc.). All these properties make these NPC ideal for use as photosensitizers of vinyl polymerization.