Comparison of photo- and thermally initiated polymerization-induced self-assembly: a lack of end group fidelity drives the formation of higher order morphologies

作者：Lewis D. Blackman, Kay E. B. Doncom, Matthew I. Gibson, Rachel K. O’Reilly · 发表于：Polymer Chemistry · 年份：2017 · DOI：10.1039/c7py00407a · 被引用次数：161 · 研究领域：Advanced Polymer Synthesis and Characterization、Polymer Surface Interaction Studies、Luminescence and Fluorescent Materials

-HPMA) PISA system. By studying the influence of the intensity of the light source used, as well as an investigation into the thermodynamically favorable morphologies, the factors dictating differences in the obtained morphologies when comparing photo- and thermally initiated PISA were explored. Our findings indicate that differences in a combination of both reaction kinetics and end group fidelity led to the observed discrepencies between the two techniques. We find that the loss of the end group in photoinitiated PISA drives the formation of higher order structures and that a morphological transition from worms to unilamellar vesicles could be induced by extended periods of light and heat irradiation. Our findings demonstrate that PISA of identical block copolymers by the two different initiation methods can lead to structures that are both chemically and morphologically distinct.