An intumescent flame retardant system using β-cyclodextrin as a carbon source in polylactic acid (PLA)

2011 ◽  
Vol 22 (7) ◽  
pp. 1115-1122 ◽  
Author(s):  
Jian-Xiang Feng ◽  
Sheng-Pei Su ◽  
Jin Zhu



Polymers ◽  
2019 ◽  
Vol 11 (1) ◽  
pp. 71 ◽  
Author(s):  
Xueying Shan ◽  
Kuanyu Jiang ◽  
Jinchun Li ◽  
Yan Song ◽  
Ji Han ◽  
...  

A new P-N containing the flame retardant, which was namely N,N′-dibutyl-phosphate diamide (DBPDA), was synthesized and it was assembled into the cavity of β-cyclodextrin (β-CD) to form an inclusion complex (IC). The structure and properties of IC were characterized by Fourier transform infraredspectroscopy (FTIR), wide-angle X-ray diffraction (WAXD), 1H nuclear magnetic resonance (1H NMR), scanning electron microscopy with X-ray microanalysis (SEM-EDS), differential scanning calorimeter (DSC) and thermal gravimetric analysis (TGA). 1H NMR and SEM-EDS were also used to identify the molar ratio of β-CD/DBPDA in IC and the results from the analyses indicated that their molar ratio was 1:1. In order to test the flame retardant effect of IC, it was added to epoxy (EP). IC was proposed to be able to act as an intumescent flame retardant (IFR) system in EP through a combination of β-CD and DBPDA properties during the combustion process. β-CD is a biomass carbon source, which has the advantages of environmental protection and low cost. Furthermore, DBPDA is both a source of acid and gas. When IC was heated, IC had the advantage of acting as both a carbon source and foam forming agent, while the DBPDA component were able to directly generate phosphoric acid and NH3 in situ. The impact of IC in low additive amounts on flame retardancy of EP was studied by the cone calorimeter test. When only 3 wt % IC was incorporated, the peak values of heat release rate (pHRR) and smoke production rate (pSPR) of EP were reduced by 22.9% and 33.3% respectively, which suggested that IC could suppress the heat and smoke release efficiently.



2019 ◽  
Vol 1 (4) ◽  
pp. 755-764 ◽  
Author(s):  
Xiaodong Jin ◽  
Suping Cui ◽  
Shibing Sun ◽  
Xiaoyu Gu ◽  
Hongfei Li ◽  
...  


2014 ◽  
Vol 488-489 ◽  
pp. 293-296
Author(s):  
Dong Ze Li ◽  
Xiao Chuan Jia ◽  
Xiu Ping Lu ◽  
Sheng Jia Zhai

A series of polylactic acid (PLA)/IFR composites was prepared by melt blending method.Capillary rheometer and rotary rheometer were applied to investigate the effects of and flame retardants on rheological properties. The results of the rheological test show that the melt flow rate increases with the increasing of content of Intumescent flame retardant. Intumescent flame retardant joined making PLA system flow rate is larger than pure PLA, melt flow rate increases, apparent viscosity decreases, relaxation time decreases, and the complex viscosity decreases gradually with the increase of scanning frequency.



Author(s):  
Weiguang Gong ◽  
Min Fan ◽  
Ji Luo ◽  
Juan Liang ◽  
Xin Meng


2017 ◽  
Vol 52 (20) ◽  
pp. 12235-12250 ◽  
Author(s):  
Xiaodong Jin ◽  
Xiaoyu Gu ◽  
Chen Chen ◽  
Wufei Tang ◽  
Hongfei Li ◽  
...  


2021 ◽  
Author(s):  
Siyin Ding ◽  
Peng Liu ◽  
Shimin Zhang ◽  
Yanfen Ding ◽  
Feng Wang ◽  
...  


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