The Studies On The Green Flame-retardance And Performance Of The Nylon-66

As one of the general engineering plastic,nylon-66 is a kind of polymer martial with high performance.Due to its excellent comprehensive properties,nylon-66 resin was used widely in those fields such as automobile,chemical,and electric appliance.However,the shortcomings including flammability of pure nylon-66 limit its further application.Therefore, to widen the application fields of nylon-66 resin,the performance of nylon-66 materials is generally improved by using the method of physical or chemical modification.Up to the present,the method of physical modification for nylon-66 is dominant,there is few reports on the study on the copolymer in which nylon-66 materials is key component.T -o get the designing polymer we start the molecular designing first,the fire-retardant structure was inserted into Nylon-66 through the copolycondensatin of the BCPPO selfmading,diamid- ogen,nylon66 salts.Our major and creative research works are listed mainly as following:(1) Preparation and characterization of the reactive flame retardant BCPPOThe reactive flame retardant BCPPO was prepared though Friedel-Crafts and Oxidation, After detailed characterization of the polymers throughh FTIR and TG we proved that we get the prediction materials.(2) The synthesis and characterization of the phosphorus containing nylon-66The phosphorus containing nylon-66 were synthesized by the melt copolycondensatin,th -e influence of the temperature,time,pressure to nylon-66 were researched;Through the test of the viscosity-average molecular weight,the optimum reaction are also determined;The results of the infrared spectrometry showed that the fire-retardant structure was inserted into Nylon66 and the quantitative analysis was mensurated.(3) The influence of the fire-retardant structure to nylon-66 were revealed by a series of testingsThe mechanical properties(tensile strength,impact strength),flame-retardant properties (oxygen index,the yield of char) were tested;The melt and weight loss of the polymer had been studied by TG,DSC;The carbonaceous layer and impact section had been investigated.The objective of the thesis is to synthesis the inherent flame retardant PA-66 with phosphorus containing in there backbones.The effect of the flame resistand is improved when the mechanical properties of PA-66 is keeping.