AN INFLUENCE OF THE BOOTSTRAP-EFFECT ON THE PHYSICAL-CHEMICAL PROPERTIES OF RAFT-BASED COPOLYMERS OF ACRYLIC ACID AND STYRENE 
K.O. Mineeva1, N.I. Osipova2, A.V. Plutalova 1, S. D. Zaitsev 3, E. V. Chernikova1.
1 Polymer Department, Faculty of Chemistry, Lomonosov Moscow State University, Moscow, Russian Federation 
2 MIREA - Russian Technological University, Moscow, Russian Federation
3 Lobachevsky State University, Nizhny Novgorod, Russian Federation 
komineyeva@ya.ru
Amphiphilic copolymers with controlled architecture are of great interest due to their ability to self-assemble in selective solvents. Copolymers based on acrylic acid and styrene as units of different polarity are capable of self-assembly in water. The microstructure of copolymer chains is well known to impact sufficiently on their properties. 
Recently we have shown that effect of selective monomer sorption (bootstrap effect) in combination with radical addition-fragmentation chain transfer (RAFT) polymerization enables to govern monomer unit sequence along the macromolecules. Additionally, this effect leads to raise in compositional homogeneity. 
In the present research we compare the physical-chemical properties of RAFT-based copolymers of styrene and acrylic acid which were synthesized in the solvents of various polarity in the presence of three RAFT-agents: dibenzyl trithiocarbonate, poly(acrylic acid) trithiocarbonate and polystyrene trithiocarbonate.
We have found that the polymerization media and the chemical nature of RAFT-agent can affect the behavior of acrylic acid and styrene copolymers in water solution, such as the stability of water dispersions at different pH, the acid-base properties of copolymers and the values of the interfacial angle
Acknowledgements 
The work was supported by Russian Foundation of Basic Researches (grant No 17-03-00131).