高性能聚芳醚酮的发展及应用

综述了聚醚酮、聚醚醚酮、聚醚醚酮酮、聚醚酮酮、聚醚酮醚酮酮等5类高性能聚芳醚酮的性能、合成方法及其改性研究进展等,并介绍了聚芳醚酮的应用情况,指出聚芳醚酮的发展趋势是通过开发新的合成技术或者改性途径,在不影响其主要性能的前提下降低生产成本.     

聚芳醚酮的改性研究

综述了特种工程塑料聚芳醚酮改性研究的进展,主要介绍了聚芳醚酮结构改性的三大类方法:主链上引入其他基团、主链上引入大侧基及共聚改性。研究表明,通过结构改性可以在保持聚芳醚酮高的耐热性能和力学性能的基础上有效地改善其加工性能和在有机溶剂中的溶解性。同时简介了聚芳醚酮与聚酰亚胺、聚醚砜、聚苯硫醚等高性能树脂以及不同种类的聚芳醚酮间共混改性的研究状况。     

聚芳醚酮的表面修饰及其在生物医用领域的应用

综述了特种工程塑料聚芳醚酮的表面修饰方法及其在生物医用领域的应用。重点介绍了选择性湿化学法和等离子体处理等聚芳醚酮表面改性方法及通过固定细胞外基质的生物功能化途径;最后,介绍了聚芳醚酮及改性聚芳醚酮在细胞培养基体、椎间融合器、关节摩擦面等临床植入体方面的应用进展,并对聚芳醚酮在生物医用领域的发展前景进行了展望。     

聚芳醚酮化学改性研究进展

介绍了聚芳醚酮的物理化学性质,主要对近年来研究的热点超支化聚醚酮改性、化学改性和磺化改性等进行了综述.     

PEK-C增韧环氧树脂的研究Ⅱ

采用酚酞基聚芳醚酮为增韧剂改性环氧树脂,以芳香胺为固化剂,制备出一种改性环氧树脂。研究了改性树脂的耐热性和微观结构。实验结果表明:随着酚酞基聚芳醚酮用量的增加,改性树脂的玻璃化转变温度先增高后降低,当酚酞基聚芳醚酮用量为15phr时,改性树脂的玻璃化转变温度最高,达到193℃。同时,改性树脂的微观结构随着PEK-C用量增加而发生变化。由海岛结构先转变成双连续互锁结构,最终发生相反转。     

含二氮杂萘酮结构聚芳醚酮和聚芳醚砜研究进展

综述了含二氮杂萘酮结构的聚芳醚酮和聚芳醚砜的结构性能及其合成、改性、应用研究进展。     

高性能特种工程塑料的发展与功能化研究

作者结合自己在高性能特种工程塑料—聚芳醚腈(PEN)及其复合材料的研究,就特种工程塑料的发展、改性及其功能化技术回顾与展望,重点对聚芳醚腈树脂及其性能相当的聚芳醚酮进行了概述。     

氯甲基化/季铵化新型聚芳醚砜酮超滤膜的研制

本文对含二氮杂萘结构聚芳醚砜酮进行改性制得氯甲基化聚芳醚砜酮。选用N-甲基一2-吡咯烷酮作制膜溶剂，依据正交设计方法制得了一系列氯甲基化聚芳醚砜酮超滤膜。考察了聚合物浓度、添加剂种类和添加量以及制膜蒸发时间等对膜性能的影响。将氯甲基化聚芳醚砜酮超滤膜浸入三甲胺溶液进行季铵化反应，得季铵化聚芳醚砜酮超滤膜。并考察了膜的抗污染性。     

高性能特种工程塑料改性研究进展

着重介绍了聚芳醚酮、聚芳酰胺及聚苯硫醚改性方法及研究进展,从化学改性方面阐明了通过引入一些化学基团,如柔性基团、刚性基团或者较大侧基来改善其某些性能,或通过改变其平面结构和破坏规整度来实现改性;从物理改性方面可以通过共混填充等来实现改性,通过改性优化性能来扩展应用领域是十分必要的.     

高生物活性聚醚醚酮化学改性研究进展

由于聚醚醚酮（PEEK）表面疏水及生物惰性，用作骨科材料难以与周围细胞、骨组织结合。通过化学改性在PEEK分子链中引入具有生物活性的功能化基团是提高其表面细胞黏附、增殖和成骨分化能力最有效的方式。基于功能化基团引入位置的不同，本文将PEEK化学改性分为苯环位改性、酮基位改性和共聚改性等三种，并且重点综述了这些不同化学改性方法的原理和特性及其对PEEK材料生物活性的影响。苯环位改性主要是通过强酸处理引入羧基等官能团，但会残留含硫或含硝化合物，对细胞有一定的毒害作用；酮基位改性是通过胺类、硼氢化钠等试剂与酮基反应，进一步接枝引入功能化基团，但是会破坏PEEK主链上的醚酮比，影响物理性能和热性能。通过亲电、亲核及卤代改性等共聚方式在PEEK侧链引入功能化基团，能保持聚合物主链醚酮比基本不变，同时提升材料生物活性，具有良好的应用前景。在化学改性的基础上，研究多种功能基团的协同作用，进一步引入物理改性，优化面向不同场景的综合性能，是拓宽其在医疗领域应用的发展趋势。     

新一代耐高温多功能重防腐涂料用树脂——聚芳醚酮的国内外发展历程及现状

聚芳醚酮(PAEK)类树脂属于耐高温、高强度的热塑性工程塑料,作为化工设备重防腐领域中搪玻璃制品的代替品,它已被日本和欧美等国家广为采用。本文从产品开发、应用领域和涂覆工艺等方面论述了PAEK类树脂的发展历程。介绍了国内在PAEK类树脂合成方面所取得的突破:在第一代产品聚醚醚酮(PEEK)的合成中,以新的溶剂环丁砜取代二苯砜,降低了聚合温度,缩短了聚合周期,减少了溶剂消耗,生产效率提高了一倍;在第二代、第三代产品的研发中,立足于国产原料,合成了具有更高耐热等级的PEEKK和PEDEK产品,它们的耐热性比国外产品更好,但成本大幅度下降。     

改性聚芳醚酮增韧环氧树脂研究

以改性聚芳醚酮(PAEK)为增韧剂对环氧树脂进行改性。通过冷场发射扫描电镜分析和冲击强度测试研究了PEAK用量对PAEK/EPOXY浇注体冲击性能的影响及其增韧机理。结果表明,纯环氧和质量分数分别为5%、15%、25%、35%和50%的6种共混浇铸体的冲击强度分别为1.92 MPa、2.97 MPa、3.06 MPa、4.63MPa、4.69 MPa以及5.36 MPa,体系的冲击强度随PAEK含量增加而提高。随PAEK用量增加,PAEK/EPOXY共混体系主体呈现为海岛-双连续相-相反转逐步过渡微观结构,这影响了共混树脂体系的冲击裂纹扩展模式,从而使得冲击性能上升。     

聚芳醚酮增韧环氧体系相结构的冲击韧性及模拟计算研究

采用SEM观察了热塑性聚芳醚酮(PAEK)共混增韧环氧树脂的浇注体脆断断口相形貌,统计分析了浇注体断口粒子相尺寸与PAEK含量间的关系,测试了浇铸体的冲击韧性(ak)。结果表明:随着PAEK的质量分数从23.1%增加到33.3%,热固性颗粒的粒径由1.59μm减小到0.99μm;树脂浇铸体的ak值在PAEK的质量分数为28.6%时增加到28.06 kJ/m2,然后再减小。在上述结果的基础上,通过有限元分析软件重构了该体系的三维相结构,预测了树脂体系的冲击强度并与实验结果进行了对比,二者相符性较好。     

“Ex situ” concept for toughening the RTMable BMI matrix composites,Part I: Improving the interlaminar fracture toughness

Aerospace‐grade bismaleimide matrix composites was toughened based on a novel ex situ resin transfer molding (RTM) technique using a special manufactured ES? carbon fabrics. The toughening mechanism and toughening effect by the technique are studied using thermoplastic PAEK as toughener. Mode I fracture toughness (G_IC) of the composites toughened by ex situ RTM technique increased up to three times higher than that of the control system, and Mode II fracture toughness (G_IIC) increased two times higher as well. The composite without toughening was denoted as control system. The microstructure revealed that a reaction‐induced phase decomposition and inversion happened in the interlaminar region, which resulted in a particles morphology that showed the thermosetting particles were surrounded with the PAEK phase. The plastic deformation and rupture of the continuous PAEK phase are responsible to the fracture toughness improvement. And the influence of PAEK concentration on toughness improvement was also investigated. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008     

Dispersion of multi‐walled carbon nanotubes in poly(aryl ether ketone) obtained by in situ polymerization

BACKGROUND: Recently, much work has focused on the efficient dispersion of carbon nanotubes (CNTs) throughout a polymer matrix for mechanical and/or electrical matrices. However, CNTs used as enhancement inclusions in a high‐performance polymer matrix, especially in poly(aryl ether ketone) (PAEK), have rarely been reported. Therefore, multi‐walled carbon nanotube (MWNT)‐modified PAEK nanocomposites were synthesized by in situ polymerization of monomers of interest in the presence of pre‐treated MWNTs. RESULTS: This process enabled a uniform dispersion of MWNT bundles in the polymer matrix. The resultant MWNT/PAEK nanocomposite films were optically transparent with significant mechanical enhancement at a very low MWNT loading (0.5 wt%). CONCLUSION: These MWNT/polymer nanocomposites are potentially useful in a variety of aerospace and terrestrial applications, due to the combination of excellent properties of MWNTs with PAEK. Copyright © 2009 Society of Chemical Industry     

Synthesis and characterization of novel adamantane‐based copoly(aryl ether ketone)s with low dielectric constants

A series of novel adamantane‐based copoly(aryl ether ketone)s (PAEK‐CF₃‐Ad) with low dielectric constants were prepared by post‐amidation of copoly(aryl ether ketone)s containing (3‐trifluoromethyl)phenyl and carboxyl groups with 4‐adamantylaniline. Compared with the preparation of adamantane‐containing poly(aryl ether ketone)s by direct polymerization of adamantyl‐substituted monomers, this side‐chain grafting method avoids various problems, such as high polymerization temperature and the difficult polymerization of adamantyl‐substituted monomers. The dielectric, thermal and mechanical properties of the synthesized PAEK‐CF₃‐Ad were characterized using a precision impedance analyzer, differential scanning calorimetry and thermogravimetric analysis, and a universal tester, respectively. The results indicate that PAEK‐CF₃‐Ad films exhibited low dielectric constants ranging from 2.33 to 2.65 at 1 MHz due to the introduction of the adamantyl groups. The synthesized PAEK‐CF₃‐Ad copolymers exhibited good thermal and mechanical properties. © 2013 Society of Chemical Industry     

New method for producing high-performance thermoplastic polymeric foams

A new method for the production of foamed thermoplastic polymers from blends of a poly(aryl ether ketone) (PAEK) and polyetherimide (PEI) is presented. The blowing agent for the foaming process is water which is produced at elevated temperatures in an extruder, via an in situ reaction between an amine end group on the PEI, and a ketone functionality on the backbone of the PAEK chain. The effect of composition, mixing, time, and temperature are investigated. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 66: 1543–1550, 1997     

Poly(aryl ether ketone)s with bromomethyl groups: Synthesis and quaternary amination

A series of bromomethylated poly(arylene ether ketone)s (PAEKs) with different contents of bromine tethered to the benzyl groups were successfully synthesized and characterized in this work. For this purpose, poly(arylene ether ketone) with 3,3′,5,5′‐tetramethyl‐4,4′‐dihydroxybipheny moiety (PAEK‐TM) was prepared by the aromatic nucleophilic polycondensation, and then the PAEK‐TM has benzylic methyl groups that were converted to bromomethyl groups by a radical reaction using N‐bromosuccinimide. Then, the bromomethylbenzyl groups in the membrane was converted to quaternary ammonium moieties in TMPAEK‐NOH. ¹H‐NMR measurements were used to characterize and confirm the structures of the resulting PAEK‐x‐BrTM and TMPAEK‐NBr derivatives (x refers to the molar percentage of bromine introduced per repeating units). TGA analysis showed that PAEK‐x‐BrTM exhibited a very low‐decomposition temperature at about 200°C corresponding to the C Br bond cleavage. The hydroxide conductivity of TMPAEK‐NOH membrane was 8 mS cm⁻¹ at room temperature, while the water uptake of TMPAEK‐NOH membrane was 22.3% at 20°C and 32.6% at 60°C. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011     

特种工程塑料PAEK的性能及应用

介绍了已工业化生产的聚芳醚酮(PAEK)类产品PEEK、PEKK、PEK、PEKEKK、PEEKK的主要性能特点,展望了其应用前景。