Synthesis Of New Types Of Macromolecular Surface Treatment Agents And Applications In Polymer/nano-particle Composites

Polymer-based nano-composites are new type of polymeric composite in which one component has the dimension less than 100nm at least, and it is one of the focuses on which intensively studied in the field of materials. A lot of research need do because it is difficult to resolve the problem of uneven dispensability of nano-particles in polymer. In this thesis, aim at the problem we carry out our research work from three different respects as following:1. Three new types of macromolecular surface treatment agents, butyl acrylate-methyl methacrylate - γ - (methacrylox) propyltrimethoxy silane (BA-MMA-GMTS), butyl acrylate-methyl methacrylate-vinyltriethoxysilane (VETS), and butyl acrylate-methyl methacrylate-hydroxyethyl acrylate (MHEA) were synthesized by free-radical co-polymerization in solution. FTIR indicates the monomers were co-polymerized. Polymerization conversions are separately 81.43%, 65.97%, and 89.15%. Polymer viscosity are separately 12.0,12.83,and 11.26ml/g, The proper temperature of co-polymerization is 80℃.2. Nano-kaolin, nano-Si₃N₄, nano-SiC, and nano-AlN were treated by macromolecular surface treatment agent (BA-MMA-GMTS). Found by the way of sedimentation, the best dosage of terpolymer for surface treatment are 5%, 10%, 7% and 9%. The treated nano-powders have better dispersivity studied with TEM; the nano-particles size becomes smaller and the dispersivity of particle size becomes narrower characterized by instrument of Nano Zetasizer; macromolecular surface treatment agent have interfacial adhesion at the surface of nano-particles studied with FTIR and XPS.3.The PVC resins were filled with treated nano-kaolin mixed with active CaCO₃, and were made into cable material J-70. The results indicates the volume resistivity of modified cable increase from 1.1×10¹¹Î© to 5.6×10¹²Î©m, tensile strength increase from 14.1Mpa to 19. 1Mpa, elongation at breakage increase from 134 to 274, fracture of low-temperature impact brittleness change from 30 to only 1 (GB/T8815-2002) , temperature of Tg transition decrease and...