Polylactic acid flame-retarded by nano-compound of form II ammonium polyphosphate with montmorillonite

IF 1.9 4区 工程技术 Q2 ENGINEERING, MULTIDISCIPLINARY
Yinglin Liu, Yina Liu, Rongjie Yang
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引用次数: 4

Abstract

It is reported a convenient method to obtain flame-retardant polylactic acid composite by adding low amount of crystal form II ammonium polyphosphate (APP-II) or nano-compound of crystal form II ammonium polyphosphate with calcium-based montmorillonite. The structures and thermal properties of the crystal form II ammonium polyphosphate and crystal form II ammonium polyphosphate with calcium-based montmorillonite were characterized by X-ray diffraction, Fourier-transform infrared spectroscopy, and thermogravimetric analysis. Crystallography and morphologies of the polylactic acid and its composites with the crystal form II ammonium polyphosphate and crystal form II ammonium polyphosphate with calcium-based montmorillonite were measured through differential scanning calorimeter and scanning electron microscopy. In flame retardancy of the polylactic acid composites, the 5 wt% crystal form II ammonium polyphosphate could make the polylactic acid achieve the UL-94 vertical burning V-0 rating and limited oxygen index 27.3%. When using crystal form II ammonium polyphosphate with calcium-based montmorillonite in flame-retarding polylactic acid, only 3 wt% nano-compound can result in the same V-0 rating level and the limited oxygen index of 28.0%. Meanwhile, polylactic acid with crystal form II ammonium polyphosphate or crystal form II ammonium polyphosphate with calcium-based montmorillonite still keeps the good mechanical properties. The developed systems are environmentally friendly and highly effective flame retarding, which show a promising future in practical large-scale polylactic acid application.
型聚磷酸铵与蒙脱土纳米复合阻燃聚乳酸
本文报道了一种简便的阻燃型聚乳酸复合材料的制备方法,即添加少量的聚磷酸铵(APP-II)或钙基蒙脱土与聚磷酸铵纳米复合材料。采用x射线衍射、傅里叶变换红外光谱和热重分析等方法对结晶型聚磷酸铵和钙基蒙脱土结晶型聚磷酸铵的结构和热性能进行了表征。用差示扫描量热仪和扫描电镜对聚乳酸及其与型聚磷酸铵和型聚磷酸铵与钙基蒙脱土的复合材料的晶体学和形貌进行了测定。在聚乳酸复合材料的阻燃性能中,5 wt%结晶型聚磷酸铵能使聚乳酸达到UL-94垂直燃烧V-0额定值和极限氧指数27.3%。在阻燃型聚乳酸中使用晶型聚磷酸铵和钙基蒙脱土时,纳米化合物含量仅为3 wt%即可达到相同的V-0额定值和28.0%的限氧指数。同时,结晶型聚磷酸铵的聚乳酸或结晶型聚磷酸铵与钙基蒙脱土的聚乳酸仍保持良好的力学性能。所研制的体系具有环保、高效的阻燃性能,在实际的大规模聚乳酸应用中具有广阔的应用前景。
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来源期刊
Journal of Fire Sciences
Journal of Fire Sciences 工程技术-材料科学:综合
CiteScore
4.00
自引率
0.00%
发文量
14
审稿时长
2.5 months
期刊介绍: The Journal of Fire Sciences is a leading journal for the reporting of significant fundamental and applied research that brings understanding of fire chemistry and fire physics to fire safety. Its content is aimed toward the prevention and mitigation of the adverse effects of fires involving combustible materials, as well as development of new tools to better address fire safety needs. The Journal of Fire Sciences covers experimental or theoretical studies of fire initiation and growth, flame retardant chemistry, fire physics relative to material behavior, fire containment, fire threat to people and the environment and fire safety engineering. This journal is a member of the Committee on Publication Ethics (COPE).
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