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The copper-catalyzed and metal-free azide-alkyne click polymerizations have become efficient tools for polymer synthesis. However, the 1,3-dipolar polycycloadditions between internal alkynes and azides are rarely employed to construct functional polymers. Herein, the polycycloadditions of dibutynoate (1) and tetraphenylethene-containing diazides (2) were carried out at 100 °C for 12 h under solvent- and catalyst-free conditions, producing soluble poly(methyltriazolylcarboxylate)s (PMTCs) with high molecular weights in high yields. The resultant polymers were thermally stable with 5% weight loss temperatures up to 377 °C. The PMTCs showed aggregation-induced emission (AIE) properties. They could work as fluorescent sensors for detecting explosive with high sensitivity, and generate two-dimensional fluorescent photopatterns with high resolution. Furthermore, their triazolium salts could be utilized for cell-imaging applications. [ABSTRACT FROM AUTHOR]

The great achievements of click chemistry have encouraged polymer scientists to use this reaction in their field. This review assembles an update of the advances of using azide-alkyne click polymerization to prepare functional polytriazoles (PTAs) with linear and hyperbranched structures. The Cu(I)-mediated click polymerization furnishes 1,4-regioregular PTAs, whereas, the metal-free click polymerization of propiolates and azides produces PTAs with 1,4-regioisomer contents up to 90%. The PTAs display advanced functions, such as aggregation-induced emission, thermal stability, biocompatibility and optical nonlinearity. [ABSTRACT FROM AUTHOR]

A novel composite microporous polymer electrolyte based on poly(vinylidene fluoride), PVDF, poly(ethylene glycol), PEG, and Li-exchanged vermiculite(Li-VMT)was prepared by a simple phase inversion technique. The prepared membrane was subjected to XRD, SEM, impedance spectroscopy. The incorporation of Li-exchanged vermiculite greatly enhanced the ionic conductivity and solvent uptake as compared to the membrane without Li-exchanged vermiculite. The Li-exchanged vermiculite plays a active role in ion transport since relatively large platelets serve as the anion and allowed for exceptionally large Li transference numbers. [ABSTRACT FROM AUTHOR]