Abstracts Book - IMRC 2018

• SB1-O021 Invited Talk
SYNTHESIS OF HYPERBRANCHED POLYACRYLATES USING SELF
CONDENSING VINYL POLYMERIZATION BY ATRP BY DIVERSE
INITIATION TECHNIQUES IN AQUEOUS DISPERSED SYSTEMS
Guillermina Garcia 1,2 , Coleen Pugh 3
1 Industry, Research And Development, United States. 2 University of Akron, Research and
Development, United States. 3 University of Akron, Departament of Polymer Science, United
States.
A major thrust of polymer reserach in both industry and academia is being driven
by the push for sustainable raw materials, environmentally friendly production
processes and products that are biodegradable. Hyperbrached polyacrylates were
synthesized by atom transfer radical polymerization by self-condensing vinyl
polymerization (ATRP-SCVP) using a new class of inimers based on a naturally
ocurring amino acid L-serine. The structure of these hyperbranched polyacrylates
(HP) includes an este group at the branch points and in the polymer backbone of
many of the repeat units, which provide sites for biodegradation via hydrolisis. In
contrast to previous studies, which was performed in bulk or solution and took long
periods of time to reach high molercular weight (Mn), we synthesized our
hyperbrached poyacrylates using emulsion and mainly miniemulsion
polymerization tecniques. This provides an enviromentally friendly system, high
average molecular weight in the range of 10 5 to 10 6 Da, particle size distribution in
the range of 50 to 500 nm, high functionality, and high reactivity rate. The emulsion
and or minimeulsion conditions that were performed include normal ATRP, reverse
ATRP, simultaneous reverse normal initiation SRNI-ATRP, and activator generated
by electron transfer AGET-ATRP. Emulsions and miniemulsions that were prepared
in OMNOVA Solution Inc. and they were analyzed by traditional methods. The
presence of braching in the hyperbranched polyacrylates was analyzed using 2D
NMR spetroscopy based on heterogenous and homogenous techniques such as 1 H-
1 H COSY, 1 H- 1 H TCOSY, 1 H- 13 C HMBC and 1 H- 13 C HSQC NMR. These results provided
us a better option to produce hyperbrahced polyacrylates with a high degree of
functionality, ina single pot in aqueous conditions controlling molecular weight, and
particle size distribution maintained colloidal stable miniemulsions.
Acknowledgment: To Dr Coleen Pugh for all support in this project.
Keywords: Minimemulsions, ATRP, Hyperbranched Polyacrylate
Presenting authors email: mina.garcia@sherwin.com