Improvement of thermal and fire properties of polypropylene
Improvement of thermal and fire properties of polypropylene
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DOI：
10.1002/app.28892
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发表时间：
2008-12
影响因子：
3
通讯作者：
V. Goodarzi;S. Monemian;M. T. Angaji;S. Motahari
中科院分区：
文献类型：
--
作者：
V. Goodarzi;S. Monemian;M. T. Angaji;S. Motahari
本研究通过聚丙烯（PP）、有机改性蒙脱土（OMMT）、纳米碳酸钙（CaCO 3）和常规阻燃剂（如聚乙烯醇、聚氧乙烯醚、聚氧乙烯吡咯烷酮、聚氧乙烯吡咯烷酮、聚十溴二苯醚（DB）和三氧化二锑（AO）。用X射线衍射仪和透射电子显微镜对化合物的形貌进行了表征。热重分析（TGA），锥形量热法，极限氧指数，UL-94，和拉伸试验也被用来调查的热和机械性能以及化合物的可燃性。从TGA获得的数据表明，同时掺入OMMT和CaCO 3纳米颗粒形成协同效应，以改善热稳定性和热氧化稳定性。聚合物降解动力学分析表明，纳米粒子的存在阻碍了PP的热降解。OMMT与CaCO 3复合比OMMT与DB/AO复合更能有效地改善材料的燃烧性能。实验结果表明，OMMT和CaCO 3的掺入改善了拉伸（即，屈服强度、拉伸强度和杨氏模量的增加）和热性能。© 2008 Wiley Periodicals，Inc.应用聚合物科学杂志，2008年
In the present research, the thermal stability and fire properties of polypropylene (PP) have been improved through direct melt intercalation of PP, organically modified montmorillonite (OMMT), calcium carbonate (CaCO3) nanoparticles, and conventional flame retardants, i.e., decabromodiphenyl oxide (DB) and antimony trioxide (AO). The morphology of the compound was characterized by means of X-ray diffractometry and transmission electron microscopy. Thermogravimetry analysis (TGA), cone-calorimetry, limiting oxygen index, UL-94, and tensile tests were also employed to investigate thermal and mechanical properties as well as the flammability of the compounds. Data, obtained from TGA, indicated that simultaneous incorporation of both OMMT and CaCO3 nanoparticles forms a synergistic effect to improve both the thermal and thermo-oxidative stability. The kinetic analysis of polymer degradation showed that the presence of nanoparticles hindered the thermal degradation of PP. The combination of OMMT and CaCO3 was more effective to improve fire properties than OMMT and DB/AO. The experimental results indicated that the incorporation of OMMT and CaCO3 improved both the tensile (i.e., the increase of yield strength, tensile strength, and Young's modulus) and thermal properties. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008