Partially Biosourced Poly(1,2,3-triazolium)-Based Diblock Copolymers Derived from Levulinic Acid

Abstract

Partially biobased poly­(1,2,3-triazolium)­s are synthesized by reversible addition–fragmentation chain transfer (RAFT) polymerization of tailor-made 1,2,3-triazole-functionalized (meth)­acrylate monomers derived from levulinic acid, followed by N-alkylation of the 1,2,3-triazole moieties by methyl iodide (CH3I) and subsequent anion exchange with lithium bis­(trifluoromethylsulfonyl)­imide (LiTFSI). Chain extension of a 1,2,3-triazole-functionalized polymethacrylate by RAFT polymerization of styrene followed by N-alkylation with CH3I and anion exchange with LiTFSI affords two poly­(1,2,3-triazole)- and two poly­(1,2,3-triazolium)-based diblock copolymers (BCPs) with different weight fractions of each block. Discussion of the structure/properties relationships of all obtained materials is based on NMR spectroscopy, size exclusion chromatography, differential scanning calorimetry, thermogravimetric analysis, and broadband dielectric spectroscopy. The morphological and self-assembling properties of neutral and charged BCPs in bulk and in thin films are investigated by small-angle X-ray scattering and atomic force microscopy experiments, respectively.

Novel Insight into the Photophysical Properties and 2D Supramolecular Organization of Poly(3,4-ethylenedioxythiophene)/Permodified Cyclodextrins Polyrotaxanes at the Air–Water Interface

“…This would suggest that the σ DC of free charge carriers is a thermally activated process and may be treated as a relaxation-type phenomenon [ 42 ]. Furthermore, to have clear information on the σ DC of PEDOT∙TMe-βCD and PEDOT∙TMe-γCD, their values were estimated from the plateau of the σ and θ spectral regions [ 42 , 43 ] ( Figure 7 ).…”

“…It is noteworthy that the flat plateau region of σ DC is detected even at low temperatures (−50 • C) and gradually extended to higher ƒ towards increasing temperature to the superior limit of 200 • C. This would suggest that the σ DC of free charge carriers is a thermally activated process and may be treated a relaxation-type phenomenon [42]. Furthermore, to have clear information on the σ DC of PEDOT•TMe-βCD and PEDOT•TMe-γCD, their values were estimated from the plateau of the σ and θ spectral regions [42,43] (Figure 7). conductivity (σ) with frequency (ƒ) and the phase angle (θ) at different temperatures PEDOT•TMe-βCD and PEDOT•TMe-γCD.…”

Effect of Asymmetric Lobe Size on the Molecular Dynamics, Glass Transition, and Dielectric Behavior in Janus Nanoparticles

“…This deviation is specific to free charge carriers moving in the bulk of NPs. 47,48 Following Figure 9a, one may observe that mobile carriers are activated after 100 °C. At room temperature, the isothermal plots of all the investigated samples exhibit principally the linear increasing trend, as depicted in Figure 9b.…”