Synthesis of a highly efficient phosphorous-containing flame retardant utilizing plant-derived diphenolic acids and its application in polylactic acid
writer：Jing J, Zhang Y, Tang XL, Fang, ZP*
keywords：flame retardant, diphenolic acid, polylactic acid
source：期刊
specific source：RSC Advances, 2016.5, 6, 49019-49027
Issue time：2016年
Organophosphorus
compound as one of the most preferred flame retardants is traditionally derived from petroleum resources. Of
recent interest is the exploration of renewable
candidates as the precursors to synthesis these compounds. Here, we report the synthesis of a novel
bio-based polyphosphonate (BPPT) through the reaction
of plant-derived diphenolic acid (DPA), caged bicyclic phosphorus (PEPA) and
phenylphosphonic dichloride (PPDC) in two steps. The BPPT was used as flame retardant
to prepare polylactic acid (PLA) blends. Significant
enhancement in the limiting oxygen index of
PLA (28.8, 33.7 and 35.4 with 2 wt%, 4 wt%, and 6 wt% of
BPPT, respectively, in the PLA blends) was obtained. Additionally, the results
in the UL94 flammability tests demonstrates that BPPT is
effective to quench the flame, which facilitate PLA blends to achieve V0 level at BPPT loading of 4 wt%. The
data of the cone tests confirm that gas phase mechanism is mainly responsible
for the excellent flame retardancy. The flame retardant PLA blends developed
herein contains a bio-mass content of more than 95 wt%.