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Advisor(s)
Abstract(s)
RAFT precipitation polymerization was here used for the molecular
imprinting of 5-fluorouracil (a drug used in cancer treatment) followed by grafting of
polymer functional brushes in the particles surface. Materials combining high
molecular recognition capabilities and stimulation triggered by changes in the
surrounding environment (e.g. pH/temperature) have thus been sought. Mathematical
modeling of the RAFT copolymerization of vinyl/divinyl monomers was used
to describe the crosslinking process involved in the molecular imprinting step. The
size of the grafted polymer functional brushes was estimated using models for the
calculation of molecular weight distribution in RAFT homopolymerization. One of
the goals of this study consists in the development of polymer reaction engineering
tools for the design of synthesis conditions leading to tailored molecularly
imprinted particles with responsive features. A first sketch of the two steps involved
in the production of the MIP responsive particles is here presented. However, the
need for new kinetic studies accounting for specificities of the molecular imprinting
and surface extension processes (e.g. presence of template during molecular
imprinting and solvent effects) is here identified. Measurements of the dynamics of
gelation and brushes growth are also needed to perform model validation.
Improvement on the modeling of RAFT gelation with heterogeneous conditions
avoiding some simplifications and the amelioration of the numerical efficiency in
the calculation of the MWD of RAFT polymers are other issues to be addressed in
future works.
Description
Keywords
Functional brushes Grafting modeling Molecular imprinting RAFT polymerization
Citation
Oliveira, Daniela; Dias, Rolando; Costa, Mário Rui (2016). Modeling RAFT gelation and grafting of polymer brushes for the production of molecularly imprinted functional particles. Macromolecular Symposia. ISSN 1022 -1360. 370:1, p. 52-65
