Fabrication of reinforced and toughened PC/PMMA composites by tuning the migration and selective location of graphenes during melt blending

Abstract

By adjusting the dispersion and distribution of graphene nanosheets (GNs) filler in polycarbonate/polymethyl methacrylate (PC/PMMA) composites, only 0.05 wt% GNs filler can significantly improve the strength and toughness of the composites.

Polycarbonate/poly(methyl methacrylate)/silica aerogel blend composites for advanced transparent thermal insulations: Mechanical, thermal, and optical studies

“…Figure 3 demonstrates the SEM micrographs of different PC/PMMA/SA blend composites. Most researchers have observed “droplet” or “sea and island” morphology for PC/PMMA blend composites, [ 26,28,57,58 ] which these structural outcomes confirm the immiscible nature of PC and PMMA.…”

“…Also, incorporating the fillers led to increased Young's modulus and decreased elongation at break than pure PC and PMMA. In another study, Peng et al [ 28 ] investigated the effects of migration and selective localization of graphene nanosheets (GNs) on the mechanical properties and TC of the PC/PMMA blend. The experimental outcomes revealed that migration and the selective localization of GNs significantly increased the overall mechanical properties of the blend, and the tensile strength and fracture toughness were greatly improved only by adding 0.05 wt% of GNs.…”

Study of the radical polymerization mechanism and its application in the preparation of high-performance PMMA by reactive extrusion

“…[14][15][16][17] Physical blending is one of the main methods for strengthening PMMA. Adding specic additives, like rubbers, 18 nanoparticles, 19,20 core-shell particles, 21,22 carbon nanotubes (CNT), 23 and graphene, 24,25 is common in the physical blending method. It should be noted that the compatibility of additives with the matrix is especially important, and poor compatibility can not only decrease the effectiveness of modication, but can even weaken the strength of polymers.…”

Fracture Behavior of Polyrotaxane-Toughened Poly(Methyl Methacrylate)

“…5 Random copolymerization of rubber-toughened PMMA with suitable acrylic co-monomers can promote shear deformation over crazing, which results in a significant increase in fracture toughness. 2 Similar efforts in this area involve utilizing ethylene-vinyl-acetate, 6,7 an ethylene methacrylate copolymer, 8 chlorinated polyethylene, 9 poly-(urethane acrylate)-PMMA core−shell particles, 10 particle and polymer brushes star polymers with a core−shell architecture, 11 graphene nanosheets, 12 carbon nanofibers, 13 cellulose, 14 and alumina. 15,16 The above approaches have shown potential to improve the fracture toughness of PMMA.…”

“…Random copolymerization of rubber-toughened PMMA with suitable acrylic co-monomers can promote shear deformation over crazing, which results in a significant increase in fracture toughness . Similar efforts in this area involve utilizing ethylene-vinyl-acetate, , an ethylene methacrylate copolymer, chlorinated polyethylene, poly­(urethane acrylate)-PMMA core–shell particles, particle and polymer brushes star polymers with a core–shell architecture, graphene nanosheets, carbon nanofibers, cellulose, and alumina. , The above approaches have shown potential to improve the fracture toughness of PMMA. However, incorporating low T g inclusions may cause adverse effects on the modulus of the PMMA matrix, especially since high loading is typically required for the substantial toughening effect, which may also compromise the yield stress and transparency of the matrix.…”