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Functional group effect on flame retardancy, thermal, and mechanical properties of organophosphorus-based magnesium oxysulfate whiskers as a flame retardant in polypropylene
Dang, Li1,3; Nai, Xueying2; Dong, Yaping2; Li, Wu1,2
2017
发表期刊RSC ADVANCES
卷号7期号:35页码:21655-21665
文章类型Article
摘要In this paper, magnesium oxysulfa tewhiskers (MOSw) were reacted with dodecyl dihydrogen phosphate (DDP) to prepare DDP functionalized MOSw (DDPMOSw). The morphology and structure of DDPMOSw were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), and X-ray photoelectron spectroscopy (XPS). Then MOSw and DDPMOSw were respectively incorporated into polypropylene (PP) to obtain hybrid composites via the melt mixing method. SEM results showed that the DDPMOSw were distributed more evenly within the PP matrix than MOSw, resulting in the improved thermal stability, nominal strain at break, and impact toughness of PP/DDPMOSw in comparison with PP/MOSw. The flammability of the composites was investigated using limiting oxygen index (LOI) and cone calorimetry (CC) tests. The results showed that the introduction of DDPMOSw into the PP matrix further increased the LOI, meanwhile, reducing the heat release rate (HRR), smoke production rate (SPR) and CO and CO2 release. SEM and energy dispersive spectroscopy (EDS) analyses of the char residues implied two reasons for the more efficient flame-retardant properties of PP/DDPMOSw than PP/MOSw: (i) DDPMOSw was more thoroughly decomposed to release more nonflammable gases and absorb more heat during the combustion process (gas-phase flame-retardant effect); (ii) DDP induced the formation of the carbonaceous residue, leading to a compact and coherent char based on MgO whiskers backbone (condensed-phase flame-retardant effect). Besides, FTIR results indicated that the phosphorous compound layer in the condensed phase also acted as a protective shield.
WOS标题词Science & Technology ; Physical Sciences
关键词[WOS]SULFATE HYDRATE WHISKER ; POLYURETHANE FOAM ; FIRE PERFORMANCE ; HYDROXIDE ; NANOCOMPOSITES ; FLAMMABILITY ; COMPOSITES ; PHOSPHATE ; BEHAVIOR ; SURFACE
收录类别SCI
语种英语
WOS研究方向Chemistry
WOS类目Chemistry, Multidisciplinary
WOS记录号WOS:000399810800037
引用统计
被引频次:6[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.isl.ac.cn/handle/363002/6232
专题青海盐湖研究所知识仓储
盐湖资源综合利用工程技术中心
作者单位1.Chinese Acad Sci, Qinghai Inst Salt Lakes, Key Lab Salt Lake Resources Chem, Xining 810008, Peoples R China
2.Chinese Acad Sci, Qinghai Inst Salt Lakes, Key Lab Comprehens & Highly Efficient Utilizat Sa, Xining 810008, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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GB/T 7714
Dang, Li,Nai, Xueying,Dong, Yaping,et al. Functional group effect on flame retardancy, thermal, and mechanical properties of organophosphorus-based magnesium oxysulfate whiskers as a flame retardant in polypropylene[J]. RSC ADVANCES,2017,7(35):21655-21665.
APA Dang, Li,Nai, Xueying,Dong, Yaping,&Li, Wu.(2017).Functional group effect on flame retardancy, thermal, and mechanical properties of organophosphorus-based magnesium oxysulfate whiskers as a flame retardant in polypropylene.RSC ADVANCES,7(35),21655-21665.
MLA Dang, Li,et al."Functional group effect on flame retardancy, thermal, and mechanical properties of organophosphorus-based magnesium oxysulfate whiskers as a flame retardant in polypropylene".RSC ADVANCES 7.35(2017):21655-21665.
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