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PP/POSS纳米复合材料热氧化稳定性 预览

Thermo-oxidative Stability of PP/POSS Nanocomposites
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摘要 采用熔融物理共混和熔融反应共混两种方法制备了聚丙烯(PP)/八乙烯基笼型硅倍半氧烷(OV—POSS)纳米复合材料,并用热重分析对两种方法制备的复合材料热氧化稳定性进行分析和比较。结果表明,在OV-POSS含量同为2%(质量分数)时,物理共混复合材料的热氧化稳定性要优于反应共混复合材料,且物理共混复合材料的热氧化稳定性随着OV—POSS含量的增加而提高。为进一步评估OV—POSS对物理共混复合材料热氧化性能的影响,利用Kissinger法和Flynn·wall-Ozawa方法从热氧化降解动力学的角度对复合材料表观活化能(Ea)进行了研究。研究表明,OV—POSS可以明显提高复合材料的Ea,含5%(质量分数)OV—POSS的物理共混复合材料的Ea为92.48kJ/mol(Kissinger法)和97.53kJ/mol(Flynn-Wall-Ozawa法),而纯PP的层。仅为67.79kJ/mol以及61.81kJ/mol。 Polypropylene ( PP )/octavinyl nanocomposites were prepared by the methods of thermo-oxidative stability of composites prepared polyhedral oligomeric silsesquioxane ( OV-POSS ) melt physical blending and melt reactive blending. The by the two methods was analyzed and compared using thermogravimetric analysis. The results show that in the condition of 2wt% OV-POSS loading, the composites by physical blending have a higher thermal oxidative stability than composites by reactive blending, and the thermal oxidative stability of composites by physical blending increases with the increasing of OV-POSS contents. In order to further evaluate the OV-POSS effect on the thermal oxidative degradation of composites by physical blending, the apparent activation energy (Ea ) of composites were studied from the angle of kinetics of thermal oxidative degradation using the Kissinger and Flynn-Wall-Ozawa methods. Studies show that OV-POSS can obviously increase Ea of the materials. When the OV-POSS content is 5wt%, Ea values of physical blending composites are 92.48 kJ/mol ( by Kissinger method) and 97.53 kJ/mol ( by Flynn-Wall- Ozawa method) , and Ea values of pure PP are just 67.79 and 61.81 kJ/mol, respectively.
作者 周灿 聂士斌 董翔 张弛 ZHOU Can1,2, NIE Shi-bin1,2 , DONG Xiang1,2 , ZHANG Chi1,2 (1. School of Mining and Safety, Anhui University of Science and Technology, Huainan 232001, China; Key Laboratory of Safety and High-efficiency Coal Mining, Ministry of Education, Anhui University of Science and Technology, Huainan 232001, China)
出处 《塑料工业》 CAS CSCD 北大核心 2016年第9期106-111,共6页 China Plastics Industry
基金 国家自然科学基金(No.51303004),国家自然科学基金大科学装置科学研究联合基金(U1332134)
关键词 聚丙烯 八乙烯基笼型硅倍半氧烷 热氧化稳定性 表观活化能 Polypropylene Octavinyl Polyhedral Oligomeric Silsesquioxane Thermo-oxidativeStability Apparent Activation Energy
作者简介 周灿,男,1990年生,硕士研究生,主要研究方向为阻燃聚合物材料制备及性能。czhou116@163.com 通信作者nsb@mail.ustc.edu.cn
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