Influence of the addition of lubricant on the properties of poly(ether ether ketone) fibers

A high‐temperature lubricant genioplast pellets (GPPS) was used in order to improve the processing behavior of poly(ether ether ketone) (PEEK) resin and high‐performance PEEK fibers were produced by melt‐spinning. The rheological properties of spinning material, morphology, mechanical, and thermal properties of PEEK fibers were characterized by using a polymer capillary rheometer, scanning electron microscopy, single fiber electronic tensile strength tester, wide‐angle X‐ray diffraction and thermal gravimetric analyzer, respectively. The results indicated that the introduction of lubricant GPPS decreased the melting viscosity of PEEK resin and improved spinnability of PEEK resin without sacrificing its thermal properties. The filaments are cylindrical with smooth surface and uniform diameter. The optimized content of GPPS was determined to be 1.0 wt% by balancing the decreased torque and changes of the mechanical properties. The strength and modulus of PEEK fibers were 420 MPa and 3.6 GPa, respectively. This should be due to the improvement in spinnability, followed by the enhancements in the orientation and crystallization of PEEK fibers in the process of drawing and annealing. POLYM. ENG. SCI., 53:2254–2260, 2013. © 2013 Society of Plastics Engineers     

Review of quantitative structure‐activity/property relationship studies of dyes: recent advances and perspectives

Dyes have been applied and are playing an increasingly important role in many industries, including the textile, printing, medical and energy industries. Their wide applications imply that specific dyes possessing given properties need to be effectively designed. The present review aims to survey information related to activity/property research of dyes that has been published in the past two decades. Emphasis is laid particularly on studies based on quantitative structure–activity/property relationships that have contributed to the theoretical design and application of dyes. Finally, the perspectives of quantitative structure‐activity/property relationship studies are set out in order to show how this method may be used to design new dyes and to evaluate their different properties. The challenges facing these studies are also outlined.     

二碘化钐在分子内环化反应中的应用

综述了二碘化钐在分子内环化反应中的应用。     

8279的显示接口分析及混合显示电路设计

分析8279芯片的显示接口及十六段和八段LED显示驱动电路的特点,提出了十六段和八段LED混合显示驱动的方法,并介绍了一种经济、实用的显示驱动电路。     

新型高强韧性奥—贝组织低合金钢的研究

作者应用新的合金设计思想,研制了一类新型高碳低合金超高强度钢。经适当热处理,获得贝氏体铁素体板条与奥氏体薄膜交替排列的奥氏体-贝氏体双相组织。文中研究了钢的组织、力学性能及其与转变温度的关系。     

贮氢合金的应用研究进展

本文概括了新型功能材料——贮氢材料的发展状况和应用研究进展,重点综述了稀土储氢合金性能改善方面的最新成果和用于二次电池的贮氢材料的状况。     

高性能陶瓷隔热材料的研制

通过溶胶一凝胶法制备了中空石英纤维增强石英基体的多孔陶瓷隔热材料,进行了力学和热物理性能测试,结果表明：材料密度0．95g／cm^3,常温下的导热系数0．135W／m·K,材料具有质量轻、强度高、隔热性能好及耐高温（1200℃）的特点。     

双苯并咪唑类配体的合成与应用研究

近年来,双苯并咪唑类配合物以其多功能性在材料科学、生物制药等领域越来越引起科学工作者的重视,而作为双苯并咪唑类配合物的基础—双苯并咪唑类配体的合成与研究已成为化工制药界的热点问题.本文通过概述双苯并咪唑类配体的合成方法和应用前景,并且提出它在具体合成及应用中需要注意的一些问题,为更好地将其应用于化学材料等领域,提供理论...     

透骨草化学成分的研究进展

透骨草是一种广泛应用的传统中药,品种众多,分布广,资源丰富,在我国民间具有重要的药用价值和悠久的药用历史。本文简单介绍透骨草种类、分布,重点介绍透骨草的化学活性成分的研究进展。     

类金刚烷型配合物[Cd（C6H5O2N）2（H2O）]n的水热合成及其晶体结构研究

以Cd(CH3COO)2和烟酸(C6H5O2N)为原料,采用水热法合成了类金刚烷型配位聚合物[Cd(C6H5O2N)2-(H2O)]n,利用元素分析、X射线单晶衍射对其结构进行了表征。该配合物属于正交晶系,Pbca空间群,a=1.144 9(5)nm,b=1.208 3(5)nm,c=1.742 8(5)nm,α=β=γ=90°,V=2.411(16)nm3,Z=8,dc=2.064 g/cm3,μ=1.834 mm-1,F(000)=1 472,R1=0.022 6,wR2=0.041 8。