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Post-polymerization modification of block copolymers for functionalization-induced self-assembly
Dissertation   Open access

Post-polymerization modification of block copolymers for functionalization-induced self-assembly

David H. Howe
Doctor of Philosophy (Ph.D.), Drexel University
Sep 2020
DOI:
https://doi.org/10.17918/00000172
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Abstract

Polymerization Nanoparticles Polymer engineering Block copolymers Self-assembly (Chemistry) Chemistry, Organic Reactivity (Chemistry)
This thesis is focused on expanding the utility of post-polymerization modification (PPM) and establishing it as a viable route for the synthesis of self-assembled polymeric nanoparticles through three primary research projects. The first project demonstrates Pd-catalyzed, Suzuki-Miyaura cross-coupling (SMC) as a new, versatile method for PPM on well-defined polymers derived from RAFT polymerization. The second project aims to employ SMC as the driving force behind a novel strategy for inducing dynamic self-assembly of block copolymers into nanoparticles through a technique termed "functionalization induced self-assembly" (FISA). The final project of this thesis improves upon the versatility and ease-of-use of FISA by extending it to the base-catalyzed thiol-epoxide "click" reaction as the primary PPM driving in situ self-assembly, thus achieving convenient polymer nanoparticle synthesis under ambient conditions and atmosphere. Keywords: click reaction, nanoparticle, polymer, RAFT, self-assembly, Suzuki

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