【摘 要】
：
Two types of antioxidants(a primary antioxidant and a secondary antioxidant) were used to improve the stability of poly(ether ether ketone)(PEEK).The effects of
【机 构】
：
High Performance Plastics Engineering Research Center
论文部分内容阅读
Two types of antioxidants(a primary antioxidant and a secondary antioxidant) were used to improve the stability of poly(ether ether ketone)(PEEK).The effects of the antioxidants on the properties of PEEK and the stabilization mechanism were investigated by some characterization methods,such as rheometer,thermogravinetric analysis(TGA),universal tester and electron spin resonance(ESR).The results indicate that the efficiency of the phosphorous antioxidant(DS) in improving the stability of PEEK was better than that of the phenolic antioxidant(DN) in both melting stability and thermal stability,and the thermal stability of PEEK sample containing 0.07％(mass fraction) DS was the best among all the samples due to the decrease of the free radicals density,as proven by ESR measurement.Additionally,no obvious changes could be observed in mechanical properties of PEEK containing antioxidants compared to those of virgin PEEK.
其他文献
A rapid and practical method for direct detection of zidovudine in high performance anion exchange chromatography (HPAEC)has been developed with integrated puls
农业非点源污染具有广泛性、随机性和难监测性、难治理性等特点,应用模型描述农业非点源污染物输移过程、进行污染负荷计算、评价防控与治理效果成为水环境保护与治理领域的
Rosa rugosa Thunb. is one of the dominant and important shrub species in estuary dunes and shingle beaches of northern China. However, its area of distribution,
运用定量分析方法,结合直观可视化描述,按照国别网络、机构网络和领域网络的不同构成对通过短期人力资源合作开发项目形成的发展中国家之间国际科技合作网络的结构特性进行研
Supported Ru-based catalysts,prepared by a surfactant-stabilized colloidal method,exhibited a good selectivity to bis(4-aminocyclohexyl)methane via the hydrogen
目的 观察右美托咪定在膝关节镜手术中单次负荷量静脉应用对患者血流动力学、镇静状态、术中寒战发生率等的影响. 方法 将2011年9月～2012年9月200例椎管内麻醉下行膝关节镜下
The authors reported a facile method for the synthesis of manganese dioxide without any template and catalyst at a low-temperature.The prepared sample was chara
A series of rotenone O-alkyl oxime derivatives was designed and synthesized.Their structures were confirmed by elemental analyses,Fourier transform infrared(FTI
Three-dimensional(3D) flowerlike hierarchical Zn2GeO4 and Mn2+-doped Zn2GeO4 microstructures have been prepared by a facile hydrothermal approach.X-Ray diffract
Objective Robot-assisted endoscopic surgery has been increasingly accepted because of its unique three-dimensional vision and precise simulation-based technolog