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Synergistic effect of different nanoparticles on flame retardant poly(lactic acid) with bridged DOPO derivative
Author(s) -
Long Lijuan,
Yin Jingbo,
He Wentao,
Xiang Yushu,
Qin Shuhao,
Yu Jie
Publication year - 2019
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.24791
Subject(s) - materials science , fire retardant , limiting oxygen index , nanoparticle , char , zinc borate , scanning electron microscope , composite material , combustion , montmorillonite , lactic acid , rheology , chemical engineering , organic chemistry , nanotechnology , chemistry , biology , bacteria , engineering , genetics
This study aimed to examine synergistic effect of nanoparticles including nano silica (SiO 2 ), organic montmorillonite (OMMT) and zinc borate (ZnB) on flame retardant poly(lactic acid) (PLA) composites containing a phenethyl‐bridged 9,10‐dihydro‐9‐oxa‐10‐phosphaphenanthrene‐10‐oxide derivative (DiDOPO). 2% was the optimal addition content for these nanoparticles in PLA/DiDOPO composites, and nano SiO 2 showed higher limiting oxygen index value (27.0%) than OMMT (25.8%) and ZnB (26.5%) at the same content. When compared with that of PLA/DiDOPO, the peak heat release rate was decreased dramatically after introducing nanoparticles, and the smoke was significant suppressed by adding SiO 2 . Among these nanoparticles, SiO 2 had an obvious enhancement in the thermal stabilities of PLA composites both under nitrogen and air conditions resulting from its barrier effect. Moreover, a compact char was formed after combustion for PLA/DiDOPO/SiO 2 . In addition, high‐resolution electron microscope and rheology results showed that SiO 2 had a well dispersive quality in PLA/DiDOPO composites. Consequently, SiO 2 shows the best synergistic effect with DiDOPO toward improving the flame retardancy of PLA. POLYM. COMPOS., 40:1043–1052, 2019. © 2018 Society of Plastics Engineers