AI Article Synopsis
- A new method for creating a hyperbranched multicyclic polymer is presented, starting with a special trithiocarbonate that has anthracene and azide groups, which is used as a chain transfer agent in polymerization.
- The process involves first forming a linear polystyrene polymer, then using UV light to create monocyclic structures that are further reacted with a specific compound to yield the desired hyperbranched polymer.
- Characterization techniques like NMR, GPC, and MALLS are employed to analyze the structure and properties of the resulting polymer, revealing it has unique features that distinguish it from traditional hyperbranched and cyclic polymers.
Article Abstract
A simple and efficient method to construct a hyperbranched multicyclic polymer is introduced. First, a tailored trithiocarbonate with two terminal anthracene units and three azide groups is successfully synthesized, and this multifunctional trithiocarbonate is used as chain transfer agent (CTA) to afford anthracene-telechelic polystyrene (PS) via reversible addition-fragmentation chain transfer (RAFT) polymerization. After that, linear PS is irradiated under 365 nm UV light to achieve the cyclization process. The monocyclic polymer further reacts with sym-dibenzo-1,5-cyclooctadiene-3,7-diyne via "A +B " strategy based on a self-accelerating click reaction to produce hyperbranched multicyclic polymer. The structures and properties of the polymers are characterized by nuclear magnetic resonance (NMR), gel permeation chromatography (GPC), UV-vis spectrophotometry, and triple-detection size-exclusion chromatography (TD-SEC). The number of monocyclic units of the resultant hyperbranched multicyclic polymer reaches about 21 based on multi-angle laser light scattering (MALLS) measurements. The plot of intrinsic viscosity versus molecular weight reveals that the α value of the unique hyperbranched multicyclic polymer is lower than both hyperbranched polymers and cyclic polymers.
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Article Synopsis
- A new method for creating a hyperbranched multicyclic polymer is presented, starting with a special trithiocarbonate that has anthracene and azide groups, which is used as a chain transfer agent in polymerization.
- The process involves first forming a linear polystyrene polymer, then using UV light to create monocyclic structures that are further reacted with a specific compound to yield the desired hyperbranched polymer.
- Characterization techniques like NMR, GPC, and MALLS are employed to analyze the structure and properties of the resulting polymer, revealing it has unique features that distinguish it from traditional hyperbranched and cyclic polymers.
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