In situ preparation of hetero-polymers/clay nanocomposites by CUAAC click chemistry

Abstract

A series of polymer/clay nanocomposites containing mechanistically two different polymers, poly(ethylene glycol) (PEG) and poly(epsilon caprolactone) (PCL), were prepared by simultaneous copper(I)-catalyzed alkyne-azide cycloaddition click reactions. Both clickable polymers, PEG-Alkyne and PCL-Alkyne, were simultaneously clicked on to azide-functional montmorillonite (MMT-N 3 ) nanoclay to get corresponding PEG-PCL/MMT nanocomposites. The chemical structures of the resulting nanocomposites were verified by following azide and silicone-oxygen bands using FT-IR and characteristic bands of PEG and PCL segments using 1 H-NMR spectroscopy. The combined XRD and TEM analysis confirmed that all PEG-PCL/MMT nanocomposites had partially exfoliated/intercalated morphologies. In addition, the increase of MMT-N 3 loading not only improved the onset and maximum degradation temperatures of the nanocomposites but also their char yields. Furthermore, the incorporation of MMT-N 3 in the polymer matrix did not significantly influence the crystallization behavior of both PEG and PCL segments.

Synthesis and electrical characterization of poly[(linoleic acid)‐g‐(styrene)‐g‐(ε‐caprolactone)] graft copolymers as gate insulator for OFET devices

“…Among the three different strategies, the grafting‐from approach is preferred since it is possible to achieve higher grafting density and film thickness. Additionally, it is a very useful approach because a wide range of monomers can be utilized together with different reaction conditions 36, 37 . In the present paper, graft copolymers including PLina‐ g ‐PSt‐ g ‐PCL were successfully prepared via the grafting‐from method using ATRP and ROP techniques in a one‐pot technique (Scheme 1).…”

“…Graft copolymers, a type of important macromolecular architecture, are segmented copolymers comprised of one or more polymer side‐chains grafted to different junction points of the macromolecular backbone 31, 33–35 . The strategies to attach pendant polymer chains onto a macromolecular backbone polymer are categorized into three main synthetic techniques: grafting‐onto, grafting‐through, and grafting‐from 26, 27, 31, 34, 36 . Among the three different strategies, the grafting‐from approach is preferred since it is possible to achieve higher grafting density and film thickness.…”

Synthesis and characterization of poly(ε-caprolactone) tetra-arm star polymer using tetra terminal alkynyl-substituted phthalocyanine by the combination of ring-opening polymerization and “click” chemistry

“…Therefore, star polymer has a great interest [20][21][22]. Recently, "click" technics have appeared in the synthesis of new structured macromolecules, which enable them to take place in many fields of science [23][24][25]. The principal characteristics of "click" chemistry are shown by simple reaction conditions, high tolerances of functional groups, lack of byproducts, light, and simple product isolations [26][27][28].…”

Modification of Poly(Styrene‐co‐Acrylonitrile) with Tetrazine by Inverse Electron Demand Diels‐Alder Reaction

“…“Click” techniques have appeared in the synthesis of new nanostructured polymers, which enable them to take place in many intellectual worlds of science. The main characteristics of “click” chemistry are indicated by simple product isolations, high tolerances of functional groups, superior regional selectivity, lack of by‐products, light, and simple reaction conditions, respectively [5–12] . The Diels‐Alder reaction was first performed in 1928 by Diels and Alder [13] .…”

“…The main characteristics of "click" chemistry are indicated by simple product isolations, high tolerances of functional groups, superior regional selectivity, lack of byproducts, light, and simple reaction conditions, respectively. [5][6][7][8][9][10][11][12] The Diels-Alder reaction was first performed in 1928 by Diels and Alder. [13] Inverse Electron Demand Diels-Alder Reaction (IEDDA), namely tetrazine ligation, has high selectivity and super-fast kinetics.…”