特种工程塑料聚醚醚酮(PEEK)的开发与应用

聚醚醚酮树脂(Polyether Ether Ketone,简称PEEK树脂)是由4．4’-二氟二苯甲酮与对苯二酚在碱金属碳酸盐存在下,以二苯砜作溶剂进行缩合反应制得的一种新型半晶态芳香族热塑性工程塑料。它属耐高温热塑性塑料,具有较高的玻璃化转变温度(143℃)和熔点(334℃),负载热变型温度高达316℃(30％玻璃纤维或碳纤维增强牌号),     

特种工程塑料聚醚醚酮的开发与应用

介绍了聚醚醚酮（PEEK）的性能特点，在航空航天工业、电子电气领域、医疗、燃源电力、机械工业、汽车工业、涂料等方面的用途，以及国内外生产现状及市场状况，并对其在我国的发展前景进行了展望。     

特种工程塑料聚醚醚酮的开发与应用

介绍了聚醚醚酮（PEEK）的性能特点，在航空航天工业、电子电气领域、医疗、燃源电力、机械工业、汽车工业、涂料等方面的用途，以及国内外生产现状及市场状况．并对其在我国的发展前景进行了展望。     

高性能工程塑料聚醚醚酮特性和应用的研究

针对机械、化工等领域的典型易损易蚀件,研究开发出4种填充增强改性热塑性工程塑料聚醚醚酮（PEEK）,通过对这些材料的物理、力学和摩擦学性能的试验评价,表明其具有高强度、低摩擦系数和高耐磨性能等特性,并且将PEEK－4、PEEK－2和PEEK－1等几种配方材料成功地应用于气体压缩机阀片和发电机组高温动密封环以及耐腐蚀阀门动密封环。     

特种工程塑料聚醚醚酮的开发与应用

介绍聚醚醚酮(PEEK)的性能特点,PEEK在航空航天、电子电气、医疗、燃源电力、机械、汽车、涂料等领域的用途,以及国内外生产现状及市场状况,并对PEEK在我国的发展前景进行了展望。     

聚醚醚酮树脂的改性及应用进展

论述了光稳定剂在PVC中的应用情况。重点介绍了受阻胺类光稳定剂和紫外线吸收剂在聚氯乙烯光降解中的作用和最新应用进展。     

工程塑料改性及成型加工技术特集之八聚醚醚酮的改性及应用

本文介绍运用聚醚醚酮原来的机械物性、热的性能、电气性能、滑动性能、耐药品性能等优异物性,实现更高性能的“PEEK”混配物各种物性。     

特种工程塑料--聚醚醚酮

介绍了特种工程塑料聚醚醚酮（PEEK）的特性、用途及其国内外的生产和市场情况,并对其在我国的发展前景进行了展望。     

超级特种工程塑料——聚醚醚酮

介绍了聚醚醚酮的性质，应用领域，以及当前国内外的研究、开发概况和发展前景。     

特种工程塑料聚醚醚酮的开发与应用

介绍了聚醚醚酮(PEEK)的性能特点，用途以及国内外生产现状及市场状况，并对其在我国的发展前景进行了展望。     

Rolltruded Poly(Aryl Ether Ether Ketone) (PEEK) for Membrane Applications

Abstract

An investigation of the transport and separation of several permanent gases (CO₂, N₂, CH₄, and H₂) and vapors (H₂O and ethanol) in unprocessed and rolltruded poly(aryl ether ether ketone) (PEEK) thin films has been conducted to evaluate PEEK for membrane applications requiring thermally and chemically stable materials. Transport coefficients and separation factors have been determined at permeation temperatures ranging from 40 to ca. 180°C. The gas transport coefficients were found to increase by up to 30% depending on the processing conditions. Actual separation factors, determined for a CO₂/N₂ gas mixture (24.6 vol% CO₂), were depressed slightly in comparison to the ideal values obtained from pure component data. In contrast, water and ethanol vapor permeabilities declined between 10 and 15% as a result of processing. For a 39.1 wt% vapor mixture of H₂O in EtOH, ideal and actual separation factors, determined at 130°C, were in good agreement. In contrast, order of magnitude improvements in the actual versus ideal separation factors were found for 11.7 and 7.6 wt% mixtures of H₂O in EtOH in both unprocessed and rolltruded PEEK. A comparison with other membranes considered for high temperature vapor dehydrations suggests that PEEK may be an excellent polymer for these applications.     

聚醚醚酮／低熔点金属合金复合材料的制备及性能

采用低熔点铜–磷(Cu-P)、铜–锡(Cu-Sn)合金与聚醚醚酮(PEEK)树脂通过真空热压烧结制得一种新型金属树脂复合材料,研究了PEEK含量对复合材料电性能及力学性能的影响,分析了材料复合界面及组织结构变化与性能变化的关系,测量并分析了材料电阻率与PEEK体积分数之间的关系。发现PEEK体积分数为15%时,复合材料的强度达到285 MPa,硬度为104.1 HRB,材料的导电性能和力学性能达到了综合最佳值,材料也形成了典型的海–岛相结构。     

Toughening of Diglycidyl Ether of Bisphenol-A Epoxy Resin Using Poly (Ether Ether Ketone) with Pendent Ditert-Butyl Groups

Poly(ether ether ketone) (PEEKDT), hydroxyl terminated poly(ether ether ketone) (PEEKDTOH) and fluorine terminated poly (ether ether ketone) (PEEKDTF) with pendent ditert-butyl groups were synthesized by the nucleophilic substitution reaction of 4,4′-difluorobenzophenone with 2,5-ditert-butylhydroquinone in N-methyl-2-pyrrolidone medium using anhydrous potassium carbonate as catalyst. Diglycidyl ether of bisphenol-A epoxy resin was blended with PEEKDT, PEEKDTOH, and PEEKDTF, and cured with 4,4′-diaminodiphenylsulfone (DDS). The polymers formed heterogeneous blends before curing, and upon curing the polymers got dispersed in the epoxy matrix. The mechanical properties of the cured blends were slightly lower than that of the unmodified resin. The fracture toughness increased with the addition of ditert-butyl PEEK into epoxy resin and the extent of improvement was dependent on the type of modifier used. Hydroxyl terminated polymers gave up to 40% increase in fracture toughness. The dynamic mechanical spectrum of the blends showed only a single T_g due to the proximity of the glass transition temperature of modified PEEK and DDS cured epoxy resin.     

Development of structural hierarchy during uniaxial drawing of PEEK/PEI blends from amorphous precursors

When poly(ether ether ketone)/poly(ether imide) (PEEK/PEI) blends are drawn in their rubbery region, prior to the critical draw ratio, they remain amorphous. Subsequent to the onset of strain hardening, the stress rises rapidly as a result of strain-induced crystallization of the chains highly oriented in the direction of strain. It is during this stage of deformation process that a highly structured physical network is formed where oriented crystallites act as nodes in the network structure. The wide angle X-ray scattering data indicate that chains in these ‘nodes’ are highly oriented and the three dimensional crystalline lattice is not well established due to poor axial registry of these highly oriented chains. This is evidenced by the absence of off-equatorial peaks. During this period, the effectiveness of drawing arises from the existence of the tie chains aligned in the direction of draw and forming the net between the crystallites. PEI, though a stiff and bulky chain, is found to delay the oriented crystallization rate of PEEK, but has little effect on its crystalline orientation in the composition range investigated.     

特种工程塑料聚醚醚酮的生产应用及发展前景

介绍特种工程塑料聚醚醚酮(PEEK)的性能特征、用途、生产方法、国内外生产和市场情况,并对其在我国的发展前景进行了展望。     

Synthesis, mechanical properties and chemical/solvent resistance of crosslinked poly(aryl-ether-ether-ketones) at high temperatures

A synthetic two-stage procedure was developed for the synthesis of moderately crosslinked polymers based on poly(aryl-ether-ether-ketone) (PEEK). Rigid crosslinks based on aromatic imines were synthetically introduced into PEEK polymer matrix resulting in PEEK materials with various degrees of crosslinking. Two specific crosslinked PEEK polymers (5% and 10% of ketone groups crosslinked) were characterized and studied in detail. Thermomechanical properties, as well as chemical/solvent resistance of these materials at high temperatures (175-280 °C) were investigated and compared to the original PEEK material (Victrex 151G). The introduction of rigid crosslinks was shown to disrupt crystallinity of PEEK very efficiently. Because tensile properties of PEEK depend on its crystallinity, we observed a decrease in properties such as Young's modulus and the ultimate elongation, the extent of which depended on the degree of crosslinking. We also observed an improvement in the elastomeric properties of the crosslinked materials, such as decrease in initial permanent set during high temperature cyclic tensile testing. Mechanical creep behavior at high temperature also improved for crosslinked polymers vs the original commercial Victrex 151G in terms of a reduced irreversible creep component. All crosslinked materials showed excellent resistance to hot oily, acidic and basic environments, as well as excellent thermal stability. Overall, we were able to synthesize “softer” materials that are more rubbery at high temperature than commercial thermoplastic Victrex 151G; these elastomer-like materials showed promising mechanical properties for high temperature applications in hot/corrosive environments.     

Fabrication and properties of high performance PEEK/Si3N4 nanocomposites

The crystallization, morphology, microhardness, scratch hardness, dynamic modulus, and wear behavior of high performance poly(ether‐ether‐ketone) (PEEK) matrix nanocomposites reinforced with 0 to 30 wt % silicon nitride (Si₃N₄) nanoparticles were reported. The crystallinity of PEEK nanocomposites increases at 2.5 wt % Si₃N₄ but, thereafter it decreases with increasing Si₃N₄ content due to the hindrance to the ordering of PEEK chains. The crystallization peak temperature and crystallization onset temperature increases by 14°C for 10 wt % nanocomposite. The melting temperature does not vary significantly with Si₃N₄ content. SEM shows almost uniform distribution of Si₃N₄ in the PEEK matrix. The Vickers microhardness and scratch hardness increases significantly up to 10 wt % Si₃N₄ content.The dynamic modulus of nanocomposites increases below and above T_g of PEEK. The specific wear rate of nanocomposites with 2.5 wt % Si₃N₄ is reduced significantly and it is lowest at 10 wt % Si₃N₄. However, the coefficient of friction of nanocomposites is more than that of pure PEEK. © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2011     

PEEK与CF/PEEK红外光谱检测及摩擦性能分析

为了了解掌握目前PEEK以及其增强复合材料的摩擦性能发展水平以及发展方向,本文对当前生产的PEEK以及CF/PEEK进行了基础性的研究和实验。首先采用红外线光谱测试了PEEK与CF/PEEK之间的成分差异。而后对材料进行了基础摩擦实验,分析了PEEK与CF/PEEK表面现象,由此对两者的摩擦机理及摩擦性能有了更进一步的升入了解。通过这些实验分析发现PEEK加入碳纤维之后吸收红外辐射引起的振动变化,以及PEEK和CF/PEEK的摩擦力矩与摩擦系数的变化趋势。对于今后PEEK的增强复合材料的研究具有指导意义。     

高固含量聚醚醚酮改性酚醛树脂固化动力学研究

采用溶液聚合法合成了高固含量(>80%)聚醚醚酮(PEEK)改性酚醛树脂(PF),用非等温DSC(差示扫描量热)法和T-β(温度-升温速率)外推法对其固化反应动力学过程进行了研究,并根据Kissinger方程、Ozawa方程和Crane方程等计算出该固化反应的动力学参数。结果表明:改性树脂的凝胶化温度为136.68℃,固化温度为167.16℃,后处理温度为197.39℃;其固化体系的表观活化能为100.02 kJ/mol,频率因子为1.84×106 s-1,反应级数为0.94(近似于1级反应)。