The Preparation And Propeties Of Halogen-Free Flame Poly (Ethylene Terephthalate) Retarded Material

Polymer materials are use in a wide range of application of our people's life,most of things about what we wear,what we eat,what we reside in and what we travel by can't leave without polymer materials.With so many excellent performances,polymer materials bring a lot of convenience to our life.Polymer materials are mainly constituted by C,H,O-these three kinds of element,which make polymer materials are inflammable.So,to improve the flame retardancy of polymer materials must be an urgent problem.Poly(ethylene terephthalate)(PET)is one kind of aliphatic polyesters,and PET are widely use in chemical fiber,polyester bottle and polyester film.Due to its inflammable we need add flame retardant into PET to prevent the fire hazard.At present,there are less study in flame retardant material of PET using these four kinds of flame retardant about MPP,MCA,ADP and ZDP.This paper firstly uses MPP,MCA,ADP,ZDP to prepare PET flame retardant materials at low content and high content respectively.Study systematically the flame retardance,thermal stability and mechanical performance of four kinds of flame retardant materials.During the research,we find that the addition of ADP can improve the flammability of PET obviously,and it also can improve the thermal stability.The addition of ZDP can't improve the flammability at all,but there are more charred layers can be find when PET/ZDP composite burning,and the less influence of mechanical performance with ZDP addition.So we chose ADP and ZDP to make composite flame retardant and go on the next step experiment.To prepare PET/ADP and PET/ZDP flame retardant materials with more additive amount,though we can learn more about the variation trend of flammability,thermal stability,mechanical property at different flame retardant addition.The experimental results show that while ADP's addition in 8wt.%,PET material can achieve V-0 of UL 94 standard,and while the addition of flame retardant more than 12wt.%,there more influence about the mechanical property of PET material.So we chose 12wt.%became the total amount of flame retardant.To adjust the ratio between ADP and ZDP,we learn that,while ADP:ZDP is 4:2,the LOI value of PET composite is 37.2%,and the material can reach to V-0 of UL 94 standard.At the same time,there are less CO generate during the burning process and less heat release can be observed,and less influence in the mechanical property.