TY  - EJOU
AU  - Guo, Wenwen 
AU  - Cai, Wei 
AU  - Wang, Dong 
AU  - Wang, Junling 
AU  - Zhu, Xiefei 
AU  - Fei, Bin 

TI  - Halogen-Free Flame Retarded Poly(Lactic Acid) with an Isosorbide-Derived Polyphosphonate
T2  - Journal of Renewable Materials

PY  - 2022
VL  - 10
IS  - 7
SN  - 2164-6341

AB  - Fabrication of flame retardants from renewable biomass has aroused extensive interest over the past decade. This
work reported a synthesis of isosorbide-derived polyphosphonate (PICPP) as an anti-flammable agent for poly
(lactic acid) (PLA). The presence of PICPP notably declined the storage modulus of PLA/PICPP owing to the
declined molecular weight of PLA catalyzed by the presence of PICPP. PLA and PLA/PICPP thermally degraded
in one stage under either air or nitrogen atmosphere. With increasing the amount of PICPP, the onset thermal
decomposition temperature of PLA/PICPP was decreased gradually, owing to the earlier decomposition of PICPP.
With only 10 wt% of PICPP, PLA/PICPP-10 achieved a high limiting oxygen index of 30.0% and UL-94 V-0 classification, manifesting that PICPP was an efficient anti-flammable agent for PLA. The inclusion of 15 wt% PICPP
also caused 33% and 16% decline in PHRR and THR of PLA, respectively. TG-IR results clarified that PLA/PICPP
produced the less typical pyrolysis products especially flammable carbonyls than PLA, which may account for the
suppressed PHRR and THR values of PLA/PICPP.
KW  - Isosorbide; polyphosphonate; poly(lactic acid); flame retardancy

DO  - 10.32604/jrm.2022.018823