Synthesis Of Organic Flame Retardant Applied In Polyamide Engineering Plastics

PA6with excellent overall performance, is one of the largest amount of engineering plastics,flammability of PA6. However, it also brings the potential for fire danger. The halogen-containingflame retardants, which have the best fire-retardant effect would result in toxic fumes. They aregradually being phased out. Therefore, the study of new high efficiency halogen-free flame-retardant PA6has great significance to the sustainable development of society. Using DOPOmaterials to design andmake up3different series prescription of flame retardants, analyzed to testthe structure by Fourier Transform infrared spectroscopy, and its fundamental physical properties,thermal properties, electrical properties. We hope to prepare a flame retardant polyamideengineering plastics, which does not reduce the mechanical properties. They are TG-DO flameretardant agent, BABT flame retardant and TBDT flame retardant agent.These different series flame retardants have different proportions for polyamides. In order toavoid the waste of materials and time, this experiment will be first to use Banbury mixer tosimulae the industrial process of melting, cutting and injection effects. Making a preliminaryassessment of flame retardancy and toughness of these mixing products by the senses. Accordingto the preliminary assessment for these mixing formula, select some excellent formula to doinjection experiment. Using these samples to make further determination of flame retardancy,mechanical properties, thermal properties, electrical properties and surface energy values, re-analysis of the data of experimental scheme. In third chapter, these are25refining formula,estimated their flame retardant performance and the toughness, make a discussion for eventuallyselect BT-5\BT-6\TD-2\T-3\T-5\T-66refining formula to do further mixing material, cuttinggranules and injection, test these samples’ density, water absorption rate, surface energy, flameretardant performance, mechanical performance, thermal performance, and electrical performance.But these PA6with flame retardant performance are all UL94V-2grade. It’s due to the addition offlame retardant content was relatively low with mass fraction of5%. The tensile strength andelongation at fracture of flame PA6are generally decreased. Increasing the addition of flameretardant for PA6, will inevitably lead to the collapse of its mechanical properties, and cannot beused as engineering plastics. Experiments have proved the PA6has a very high water absorptionrate once again. The addition of flame retardants can reduce the water absorption alittle. Dielectricloss of flame PA6is not very well based on the electrical properties of data and mapping, whichlimits its application in the electrical field. We select BABT-13and TBDT-312to do the nectexperiment based on its comprehensive performance.In order to guarantee mechanical performance of PA6, the added volume of flame retardant is small and led to flame retardant effect is not good. We decided to modified polyamide using epoxyto improve its mechanical properties. Tesed their solution extraction, gel glue of time, infraredspectrum, water absorption rate, thermal performance, and electrical performance. In the fourthchapter, using different proportions of DGEBA and-caprolactam to select the optimalproportions for the synthsis of high performance modified polyamide. Their morphology includesbrittle solids, liquid, rubbery hard (depending on response ratio). The copolymer tensile strengthincreases with DGEBA increase. When DGEBA:-caprolactam ratio is80:20DGEBA, is thecopolymers of polycaprolactam activity ratio. Reaction reached its maximum at this time, is thebest ratio of epoxy adhesives, but discussing this experiment is the modification of polyamide andto enhance the thermal and mechanical properties, chose c formulation flame retardantmodification experiment to continue the experiment to add flame retardant.In on modified polyamide for flame retardant modified, we attempts to uss EG,SFR6600,silica, MCA, polyamide elastic body and laboratory homemade flame retardant agent to design20refining formula, and to the flame retardant performance and the toughness for estimated anddiscussion, eventually select X-5/Y-5/JG-2totally3refining formula to do further mixingmaterial, cutting granules and injection, test their density, water absorption rate, surface energy,flame retardant performance, mechanical performance, thermal performance, and electricalperformance. PA6with different flame retardant modification of flame retardancy grade are UL94V-1. Flame retardancy is still not very satisfacted, and has a space to explore. Modified polyamidewith good mechanical properties, even if increased the amount of fire retardant, still did not causesignificant variation in mechanical properties.