Preparation Of Zirconium-Aminotrimethylenephosphate And Study On The Complex Flame Retardancy Of EVA

Ethylene-Vinyl Acetate Co-polymer(EVA),which is widely used in foam material,film,cable material,car industry as well as heat glue,is an important part of general plastics.Nevertheless,the usage of EVA is seriously limited by its flammability,so it is pressing that innovative flame retardants that offers efficiency,environmental-friendship as well as guaranteed value in practical in EVA.application are developed in EVA.In our research,Aminotrimethylenephosphonic acid(ATMP),with high content in phosphorus and organic bones,was reacted with ZroCl2·8H2O by means of solution-precipitation' to prepare Zr-ATMP,and EVA-based composites was prepared by melt blending.Meanwhile,flame-retardancy,mechanical properties,thermal stability and structures of char residues were analyzed,and flame-retarding mechanisms were described.Results indicated that Zr-ATMP played an important role in synergistic flame retarding.In EVA/ATH/RDP/Zr-ATMP compos'ites,limited oxygen index(LOI)reached to 27.5%while horizontal burning rate decreased to 13mm/min when adding 5wt%of Zr-ATMP.A little dosage of Zr-ATMP could act as synergistic agent in EVA/starch/APP/Zr-ATMP and EVA/vinasse/MPP/Zr-ATMP composites,while V-0 rating was obtained in the UL-94 vertical burning test,and LOI reached 31.0%and 30.5%respectively.When Zr-ATMP was added as the acid resource in EVA/vinasse/MCA/Zr-ATMP intumscent flame retarding composites,the optimum appeared at 10wt%of vinasse,10wt%of MCA as well as 20wt%of Zr-ATMP,obtaining UL94 V-0 rating and 26.0%in LOI.Functions of Zr-ATMP in catalysing charring and improving the quality of char layer were found,meanwhile,proper dosage of Zr-ATMP contributed to better mechanical properties and thermal stability.