杂萘联苯聚芳醚酮改性环氧树脂的结构与性能

采用新型耐高温高性能热塑性树脂杂萘联苯聚芳醚酮(PPEK)对环氧树脂(EP)进行共混改性.研究了共混物的结构和热力学性能,并对其增韧机理进行了分析.结果表明,EP/PPEK/4,4'-二氨基二苯砜共混物的热性能得到了提高而断裂韧性整体呈下降趋势.在添加15份PPEK时,共混物的临界应力强度因子(KIC)略有提高,即韧性...     

新型含偶氮结构聚芳醚砜醚酮酮的合成与表征

在无水AlCl3及N-甲基吡咯烷酮(NMP)/1,2-二氯乙烷(DCE)复合溶剂的存在下,将含砜基芳二醚类单体与含偶氮苯结构芳二甲酰氯进行低温付-克缩聚反应,合成了一类新型含偶氮结构聚芳醚砜醚酮酮树脂。用IR、TG、WAXD及元素分析等技术进行了结构表征和性能测试。结果表明:所合成的聚合物树脂具有预期结构且为非晶态聚合物;在N2气氛中质量损失5%的温度(Td)分别为445～463℃;聚合物除了能在浓硫酸、CF3COOH/CHCl3等强极性质子型溶剂中溶解外,还能溶解于N-甲基吡咯烷酮(NMP)、N,N-二甲基甲酰胺(DMF)、二甲基亚砜(DMSO)等强极性非质子型溶剂中,也能在普通溶剂,如氯仿(CHCl3)、1,2-二氯乙烷(DCE)、四氢呋喃(THF)等中溶解。     

耐高温杂环聚芳醚酮的合成与表征

合成了一种4－（4－羟苯基）－2，3－二氮杂萘酮－1（DHPZ）的杂环单体，通过DHPZ与4，4’－二氟二苯甲酮缩聚，得到可溶于有机溶剂的可成膜的耐高温聚芳醚酮（PAEK）聚合物，用IR和^1H NMR表征了聚合的的结构，用动态粘弹谱测得聚合物的玻璃化转变温度为256℃，5％热失重温度为490℃。     

含二氮杂萘酮联苯结构双马来酰亚胺的合成

由含二氮杂萘联苯酮结构的芳香族二元胺4-[4-(4-氨基苯氧基)苯基]-2-(4-氨基苯基)二氮杂萘-1-酮(DHPZ-DA)与顺丁烯二酸酐(MA)反应得到了含二氮杂萘酮联苯结构的双马来酰亚胺预聚物(DHPZ-BMI),并对其进行了FT-IR红外及1H-1H COSY NMR核磁表征。对其溶解性的研究表明,DHPZ-BMI易溶或部分溶解于一些常见低沸点极性溶剂,如氯仿、丙酮。利用示差扫描量热仪(DSC)对DHPZ-BMI热行为进行了研究,结果表明该预聚物的熔点较高,熔融和固化过程的温度范围在低升温速率下有所重叠。为此,加入不同含量的2,2′-二烯丙基双酚A(DABPA)改善其工艺性,并采用DSC对其热性能进行了初步研究,结果表明DABPA的加入,可明显改善树脂的固化行为。     

含二氮杂萘酮结构环氧胶粘剂的研制

以低分子质量舍二氮杂萘酮结构环氧树脂与环氧树脂E44配合作为胶粘剂基料，低分子聚酰胺(H-4)为固化剂，试制了一种在常温及中温下都有较好粘接性能的环氧胶粘剂。当配方为m(E44)：m(ER)：m(H-4)=4:4:9时．在180℃下固化3h后，测其常温下的拉伸剪切强度为17．65MPa，80℃下为19．71MPa。并研究了固化工艺对粘接性能的影响。     

邻甲基二氮杂萘联苯型聚醚酮的合成及表征

以自制的新型类双酚单体４－（３－甲基－４－羟基苯基）－２,３－二氮杂萘－１一酮,与４,４′－二氟二苯酮反应,合成了新型聚芳醚酮。初步探讨了聚合条件;用核磁共振、红外光谱分析研究了双酚单体及聚合物的结构;用ＤＳＣ、ＴＧＡ分析了聚合物的耐热性。实验结果表明,此类双酚单体具有与双酚类似的活性,可以进行聚合反应,由此合成的材料具有优异的综合性能：４００℃以下聚合物几乎没有热损失;对溶剂的溶解性能优于其它聚醚酮;力学性能良好。由于主链上引入了甲基基团,为拓宽材料的应用范围提供了一个潜在的功能基团。     

含氯侧基聚芳醚酮醚酮酮的合成与表征

以α-萘酚为原料，通过和4，4′-二氟二苯酮在N，N-二甲基乙酰胺（DMAC）及K2CO3中的缩合反应制备了一种含萘环的新型芳醚单体4，4′-二（α-萘氧基）二苯酮（DNBP），将其分别与2，5-二氯对苯二甲酰氯（DCTPC）。对苯二甲酰氯（TPC）等芳二酰氯通过在NMP/AlCl3/ClCH2CH2Cl复合溶剂/催化剂体系中的低温溶液进行亲电共缩聚反应，合成了一系列在分子主链芳环上引入侧基氯原子的同时，又在主链中引入刚性萘环结构的新型聚芳醚酮醚酮酮无规共聚物。     

杂萘联苯聚芳醚酮超滤膜的铸膜液配方研究

为了考察不同铸膜液配方对相转化法制备杂萘联苯聚芳醚酮(PPEK)非对称超滤膜的影响,按照固定1种组分质量分数,改变另外2种组分比例的方法,对铸膜液黏度、凝胶速度及膜结构和性能的变化规律进行了研究。结果表明,聚合物质量分数是决定黏度的主要因素,而铸膜液黏度和添加剂的亲水性对凝胶速度影响很大;铸膜液黏度和凝胶速度可以较好地解释膜结构和性能的变化规律。     

含二氮杂萘酮联苯结构耐高温聚氨酯胶的合成

采用本体聚合,将自制的含有4—(4’—羟基苯基)—2,3—二氮杂萘—1—酮(DHPZ）^[1—3]作为单体引入双组分聚氨酯的固化剂中,合成了一类新型的含杂萘三联苯结构的聚氨酯胶粘剂。DHPZ的扭曲和非共平面杂环结构使聚合物难以实现长程有序。从而提高了其刚性和耐高温性能。常温拉伸强度不低于20MPa,而且具有较强的耐酸,耐水水解性能。以FT-IR,DSC,TGA等分析手段研究了聚合物的结构和耐热性能。结果表明,新型聚氨酯胶粘剂具有高的玻璃化转变温度（Tg=340～370K）,氮气氛中10%热质量损失温度为570K,在520K的温度下无热质量损失。该胶粘剂可以在高温条件下使用。     

Mechanical and Thermal Properties of Poly(Phthalazinone Ether Sulfone)/Poly(Ether Sulfone) Blends

The mechanical and thermal properties of poly(phthalazinone ether sulfone) (PPES)/poly(aryl ether sulfone) (PES) blends prepared by melt-mixing were investigated by dynamic mechanical thermal analysis (DMTA) and thermogravimetric analysis (TGA). The dynamic mechanical thermal analysis results show that the incorporated PES has a large influence on the heat stability of PPES. The DMTA results display that the blends with a single glass transition temperature, which increases with increasing PPES content, indicates that PPES and PES are completely miscible over the studied composition range. The thermodegradative behavior of PPES/PES blends was used to analyze their thermal stability. The Friedman technique was used to determine the kinetic parameters (i.e., the apparent activation energy and order of reaction of the degradation process). The results indicate that the presence of the PES component influences the thermal stability of the PPES. On the basis of the kinetic data derived from Friedman' approach, the lifetime estimates for pure PPES, pure PES, and the blends generated from the weight loss of 5% were constructed.     

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.     

新型耐高温杂环聚醚砜酮酮材料的研究

合成一种新型热塑性耐高温杂环聚醚砜酮酮材料（ＰＰＥＳＫＫ）,研究了材料的热性能、力学性能、电性能、溶解性能、摩擦性能及膜性能。结果表明,ＰＰＥＳＫＫ为一类具有较高耐热性、综合性能优良、成本低的机械工程塑料。     

Ion‐Selective Ionic Polymer Metal Composite (IPMC) Actuator Based on Crown Ether Containing Sulfonated Poly(Arylene Ether Ketone)

This study introduces the concept of ion selective actuation in polymer metal composite actuators, employing crown ether bearing aromatic polyether materials. For this purpose, sulfonated poly(arylene ether ketone) (SPAEK) and crown ether containing SPAEK with molar masses suitable for membrane preparation are synthesized. The synthesized polymers are characterized using Nuclear magnetic resonance (NMR) and fourier transform infrared spectroscopy (FTIR) spectroscopy, thermal gravimetric analysis (TGA), and differential scanning calorimetry (DSC). Ionic polymer metal composite (IPMC) actuators are fabricated by electroless chemical deposition of a platinum (Pt) layer on both sides of SPAEK and crown‐ether containing SPAEK membranes, resulting in electrode layers of around 120 nm thickness. Actuation experiments demonstrate cation specific responses and bending degrees of the IPMC actuators. Incorporation of crown ether units in the polymer backbone results in an improved and ion‐selective bending displacement compared with SPAEK actuators. S(25)C(50)PAEK actuators show an increased bending displacement of 28% for Na⁺ and 20% for K⁺ ions.

     

New Proton Exchange Membranes Based on Sulfonated Poly(Arylene Ether Sulfone) Copolymers: Effect of Chain Structure on Methanol Crossover

The main drawback of direct methanol fuel cells is methanol crossover. One strategy to overcome this problem is design of new polymeric membranes. Two structurally different diols named as 4,4′-(1,4-phenylene diisopropylidene) bisphenol and 4,4′-(1,3-phenylene diisopropylidene) bisphenol (para- and meta-substituted monomers) were used to prepare two groups of poly(arylene ether sulfone)s with different structures and related membranes therefrom by solution casting. It was found that para- or meta-substitution positions in monomers affected the methanol permeability of membranes. Other influenced properties of resulted membranes such as ion exchange capacity, water uptake, proton conductivity, glass transition temperature, and mechanical strength were studied and compared.     

Polymer Electrolyte Membrane Based on Sulfonated Poly(Ether Ketone Ether Sulfone) (S-PEKES) with Low Methanol Permeability for Direct Methanol Fuel Cell Application

Poly(ether ketone ether sulfone), (PEKES), was synthesized by the nucleophilic aromatic substitution polycondensation between bisphenol S and 4,4′-difluorobenzophenone (system A), and between bisphenol S and 4,4′-dichlorobenzophenone (system B). The oxidative stability was characterized by using a Fenton's reagent. S-PEKES membranes show a higher thermal stability than that of Nafion 117 and comparable to that of S-PEEK 150XF. The proton conductivity values of S-PEKES of the highest DS are comparable to those of Nafion 117 and S-PEEK. The methanol permeability of the synthesized and fabricated S-PEKES membrane is lower than that of Nafion 117 by at least an order of magnitude.     

关于聚醚砜膜的研究进展

介绍了聚醚砜 (PES)膜的制备以及 PES的浓度、不同添加剂和溶剂等对膜性能的影响 ,并对 PES超滤膜的表层结构的形成作了初步的探讨。     

磺化聚醚醚酮的合成及其性能表征

采用浓硫酸作为磺化剂,利用两种不同分子量的聚醚醚酮(PEEK)制备了具有不同磺化度的磺化聚醚醚酮(SPEEK)膜,用FTIR 和DSC对SPEEK进行了表征,通过质子交换容量(IEC)对磺化度进行了测定,并对SPEEK膜的质子导电性能进行了研究.结果表明,质子交换容量(IEC)与磺化度均随着反应时间的延长而增大,吸水率也随磺化度的增加而增大.     

含环己烯、甲基氮杂环结构的新型聚醚砜酮共聚物的合成

以新型聚合单体1-甲基-4,5-二（4-氯代苯甲酰基）环已烯与4-（3,5-甲基-4-羟基苯基）-2,3-二氮杂萘-1-酮、4,4’-二氯二苯砜单体经亲核取代反应,成功地合成了含环己烯结构的杂环联苯型聚醚砜酮聚合物。用FT-IR、1H-NMR、DSC、X-射线衍射等方法对聚合物进行了表征,并研究了聚合物的溶解性能。结果表明,聚合物是一种具有较高的玻璃化温度的可溶性无规共聚物。聚合物含有不饱和双键结构,是一种反应性高分子。     

Sulfophenylated Poly (Ether Ether Ketone Ketone) Nanofiber Composite Separator with Excellent Electrochemical Performance and Dimensional Thermal Stability for Lithium-Ion Battery via Electrospinning

In this investigation, the sulfophenylated poly (ether ether ketone ketone) (SPEEKK) separators for lithium-ion batteries (LIBs) are prepared via electrospinning. The electrospun sulfophenylated poly (ether ether ketone ketone) membranes (es-SP) are then modified with lithium bis(trifuoro-methanesulfonyl)imide (LiTFSI) by immersing in the LiTFSI/ethanol solution to obtain the modified es-SP composite separators (es-SP-Li). SPEEKK displays excellent dimensional thermal stability, and thus the thermal shrinkage of es-SP-Li-20 (20% of LiTFSI in ethanol) composite separators is only 2% after 0.5 h at 200 °C. The strong polarity of sulfonic acid groups on SPEEKK and LiTFSI enhances the electrolyte wettability and uptake, and thus afford more Li source, so as to promote the conductivity of lithium ions in the composite separators, which in turn exhibit positive impacts on the rate and cycling stability performance of LIBs. The Li//LiFePO₄ cells assembled with es-SP-Li-20 separator demonstrate excellent electrochemical stability over 170 cycles at 0.2 C with a reversible discharge capacity of 153 mAh g⁻¹, and a promising rate capacity at 2 C. In short, the as-prepared es-SP-Li composite separators with excellent comprehensive property emerge as a promising application in LIBs.