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Synergistic effect of polyhedral oligomeric silsesquioxane on the flame retardancy and thermal degradation of intumescent flame retardant polylactide
XUAN Shanyong 1,HU Yuan 2 * #,SONG Lei 2,WANG Xin 2,YANG Hongyu 2,LU Hongdian 2
1.State Key Laboratory of Fire Science, University of Science and Technology of China, HeFei 230027
2.State Key Laboratory of Fire Science, University of Science and Technology of China
*Correspondence author
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Funding: Specialized Research Fund for the Doctoral Program of Higher Education(No.20080430101), National Natural Science Foundation of China (No.No. 51036007), the joint fund of NSFC and Guangdong Province(No.No. U1074001)
Opened online:19 December 2011
Accepted by: none
Citation: XUAN Shanyong,HU Yuan,SONG Lei.Synergistic effect of polyhedral oligomeric silsesquioxane on the flame retardancy and thermal degradation of intumescent flame retardant polylactide[OL]. [19 December 2011] http://en.paper.edu.cn/en_releasepaper/content/4455127
 
 
In this study, intumescent flame retardant polylactide/trisilanolisobutyl polyhedral oligomeric silsesquioxane (PLA/TPOSS) composites were prepared via melt blending method. The morphology of the PLA nanocomposites was assessed by transmission electron microscopy (TEM). The flame retardancy of the PLA/TPOSS composites was evaluated by limiting oxygen index (LOI) test and UL-94 test. It was observed that the addition of TPOSS had evident flame retardant effect in comparison to the results obtained from neat PLA. The PLA nanocomposite showed a 69 % reduction of heat release capacity (HRC) when tested in the microscale combustion calorimeter (MCC). Thermalgravimetric analysis (TGA) showed the incorporation of intumescent flame retardant and TPOSS had effectively delayed the thermo-oxidation process of the PLA. The thermal degradation mechanisms of the PLA/TPOSS composites were investigated by thermogravimetric analysis/infrared spectrometry (TG-IR) and direct pyrolysis/mass (DP-MS) analysis.
Keywords:Polylactide; Polyhedral oligomeric silsesquioxane; Thermal degradation; Flame retardancy
 
 
 

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