Category: copper-catalystIn 2022 ,《Polymer Grafted Nanoparticle Composites with Enhanced Thermal and Mechanical Properties》 appeared in ACS Applied Materials & Interfaces. The author of the article were Kubiak, Joshua M.; Li, Buxuan; Suazo, Mathew; Macfarlane, Robert J.. The article conveys some information:
The distribution of filler particles within a polymer matrix nanocomposite has a profound influence on the properties and processability of the material. While filler aggregation and percolation can significantly enhance particular functionalities such as thermal and elec. conductivity, the formation of larger filler clusters and networks can also impair mech. properties like strength and toughness and can also increase the difficulty of processing. Here, a strategy is presented for the preparation of functional composites that enhance thermal conductivity over polymer alone, without neg. affecting mech. performance or processability. Thermal crosslinking of self-suspended polymer grafted nanoparticles is used to prepare highly filled (>50 volume %) macroscopic nanocomposites with homogeneously dispersed, non-percolating alumina particles in an organic matrix. The initial composites use low glass transition temperature polymer grafts and thus are flexible and easily shaped by thermoforming methods. However, after thermal aging, the resulting materials display high stiffness (>10 GPa) and enhanced thermal conductivity (>100% increase) and also possess mech. strength similar to commodity plastics. Moreover, the covalent bonding between matrix and filler allows for the significant elevation of thermal conductivity despite the extensive interfacial area in the nanocomposite. The thermal aging of polymer grafted nanoparticles is therefore a promising method for producing easily processable, mech. sturdy, and macroscopic nanocomposites with improved thermal conductivity The experimental part of the paper was very detailed, including the reaction process of Cupric bromide(cas: 7789-45-9Category: copper-catalyst)
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.Category: copper-catalyst
Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”