Phosphonated Lipids as Primary Plasticizers for PVC with Improved Flame Retardancy

Abstract

Bio‐based plasticizers bearing moieties exhibiting flame retardancy properties [dimethyl (methyl oleate)phosphonate (PMO), diethyl (methyl oleate)phosphonate (PMO2), dimethyl (methyl linoleate)phosphonate (PML), dimethyl (dimethyl oleate)phosphonate (PDE)] are synthesized from methyl oleate, methyl linoleate, and oleic diacid through free‐radical addition of dialkyl phosphonates. Soft PVC is prepared from PMO, PMO2, PML, and PDE primary plasticizers and compared to materials containing usual diisononyl phthalate DINP. Rheological behavior, thermal stability, mechanical properties, and flame resistance performances of these PVC films are carefully investigated. The presence of the phosphonate group into the plasticizer structure explains the best thermal stability of the PVC films based on phosphonated plasticizer than that of based on DINP. Regarding all these results, PMO and PDE can be considered as efficient flame retardant primary plasticizers for PVC and can substitute phthalates in soft PVC based materials.Practical Applications: These biobased additives are elaborated as plasticizers for PVC improving flame retardancy.Lipids were investigated as additives for polymeric materials. Looking at replacing phthalates in soft PVC formulations, phosphonated lipids demonstrate both a flame‐retardant efficiency and plasticizing properties (mechanical properties, gelation temperature) for this polymer.