Synthesis of castor oil based plasticizers containing flame retarded group and their application in poly (vinyl chloride) as secondary plasticizer

Epoxidized castor oil (ECO) and castor oil phosphate ester (COPE) were synthesized. Structure of two functionalized castor oil was characterized with FTIR and 1 H NMR. Property of poly (vinyl chloride) PVC blends plasticized with ECO and (COPE) as secondary plasticizer was studied. The results indicated that thermal stability of plasticized PVC blends was improved, LOI value of PVC blends cooperated with COPE could reach 27.8%, flame retardant performance of COPE was put into effect by promoting polymer carbonization and forming a consolidated and thick flame retardant coating, which is effective to prohibit the heat flux and air incursion.