| Polycarbonate composite resin is a kind of thermoplastic engineering plastics withspecial molecular structure and excellent comprehensive performance, which has importantapplication in the field of protective material.In recent years, the multi-functionalization and high performance of polymer has beenthe hot field of polymer materials research and application.The filling nanoparticles inpolymer of great significance in terms of developing the new type of composite materials.To investigate the effect of diamond power(DP) as a filler on polymer materialmechanical properties, composites were synthesized with melt blending method bypolycarbonate and diamond powder, the PC/DP composite mechanical properties and otherproperties were primarily explored.(1)The surface organic modification of diamond power was studied on the followingmethod: silane coupling agent3-(trimethoxydilyl) propylmethacrylate (KH-570)graftingmodification. The modified diamond powder was tested by FT-IR and particle size testerwhich indicated that modifier was grafted to the filler surface while photos from SEM testsmanifested the soft aggregate was opened to a certain degree.(2)The PC/DP nanocomposites were prepared via melting blending.At the same time,their properties of quasi-static mechanics, dynamic mechanics were examined. Resultsshowed that the fill of nanoparticles was able to increase the bending strength and modulus,as well as stretching strength and modulus. Hopkinson bar experiment found that thediamond powder reinforced composites under the dynamic load has obvious nonlinearcharacteristics and strengthening effect of strain rate. Under quasi static loading, the stressstrain curve showed qualification viscoelasticity properties. Compression strength underdynamic loads was greatly improved than the quasi static load. SEM tests showed thatmodified diamond powder was evenly dispersed in the PC substrate, and gained a goodinterface compatibility, as well as the effect of enhanced toughening. |
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