Abstract
The resource utilization of industrial solid waste phosphogypsum (PG) plays an important role in the development of phosphorus chemical industry. Here, APG-poly(methyl methacrylate) (PMMA) composite microspheres were synthesized from calcined phosphogypsum (APG) through a process of surface modification followed by in-situ free radical suspension polymerization. Detailed characterization of the chemical structures and particle properties of these composite microspheres were conducted utilizing diverse analytical techniques, shedding light on the microspheres' formation mechanisms. Subsequently, these microspheres were added to polyvinyl chloride (PVC) as fillers to prepare composites. The results showed that the particle size distribution of composite microspheres was in the range of 100–150 μm, and the surface of the microspheres was regular and rounded. Moreover, the surface hydrophobicity of the microspheres increased significantly. Furthermore, using microspheres as fillers for PVC, the dispersion of APG in the PVC matrix was improved, which enhanced the interfacial interaction between APG and PVC and significantly improved the mechanical properties and thermal stability of the PVC composites. The results provide a new strategy for the application of PG in polymer materials.
Published Version
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