Formula: Br2CuIn 2019 ,《Grafting of amphiphilic block copolymers on lignocellulosic materials via SI-AGET-ATRP》 was published in Journal of Polymer Science, Part A: Polymer Chemistry. The article was written by Vidiella del Blanco, Marta; Gomez, Vera; Fleckenstein, Peter; Keplinger, Tobias; Cabane, Etienne. The article contains the following contents:
Functionalizing biosourced materials is a major topic in the field of materials science. In particular, grafting polymerization techniques have been employed to change the surface properties of various substrates. Here, we report on the grafting of amphiphilic block copolymers in lignocellulosic materials using surface-initiated activators generated by electron transfer at. transfer radical polymerization (SI-AGET-ATRP). With this modification, it is possible to combine the interesting properties (anisotropy and high mech. stability) of lightweight lignocellulosic materials, such as wood, with the special properties of the grafted block copolymers. Hydroxyl groups on wood cell wall biopolymers were used for the chem. bonding of an alkyl bromide as the initiator for AGET-SI-ATRP of a highly hydrophilic monomer ([2-(methacryloyloxy)ethyl]trimethylammonium chloride) and a highly hydrophobic fluorinated monomer (2,2,3,3,4,4,5,5-octafluoropentyl methacrylate). The successful grafting of homopolymers and block copolymers onto the wood structure was confirmed through Fourier transform IR and Raman spectroscopy. The functionalization with the two homopolymers yielded lignocellulosic materials with opposite wettabilities, whereas by the adjustment of the ratio between the two copolymer blocks, it was possible to tune the wettability between these two extremes. The results came from multiple reactions, including the reaction of Cupric bromide(cas: 7789-45-9Formula: Br2Cu)
Cupric bromide(cas: 7789-45-9) can be used as reducing agent, when complexed by three molecules of pyridine initiators for the controlled polymerization of styrene, methyl acrylate and methyl methacrylate.Formula: Br2Cu
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Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”