杂萘联苯结构聚醚腈酮漆包线的制备和性能

以新型杂萘联苯聚醚腈酮（PPENK）为基料，制备出耐热漆包线用绝缘漆．研究了漆液的浓度、温度及聚合物特性粘度对漆液流动粘度的影响．结果表明，随着溶液浓度和聚合物特性粘度的提高以及漆液温度的降低，漆液的涂—4粘度值增大，当特性粘度为0．45—0．55dL／g、溶液浓度为18％、漆液温度为35-40℃时，制备的漆包线绝缘漆的厚度可达到0．065mm，在长度30m内的针孔数为0个．当聚合物的特性粘度达到0．48dL／g时，漆包线具有良好的柔韧性和附着性．材料中扭曲非共平面的杂萘联苯结构和反应活性基团-CN的存在，提高了漆包线的电性能和热性能．     

漆包线脱漆剂的研制和应用

一、前言在电器工业、电机工业以及其它工业上经常会用到漆包线,在使用过程中必须将漆包线端头的绝缘漆彻底清除才能焊接。除去绝缘漆的方法很多。有人工刮漆、机械刮漆以及使用脱漆剂,漆包线的漆膜具有高的机械强度和耐溶剂性。人工刮漆速度慢,耗     

漆包线绝缘漆热老化反应动力学参数的研究

为确定漆包线绝缘漆的热老化动力学参数,对其进行了加速热老化实验.通过对绝缘漆热老化反应动力学方程进行变换处理,并利用最小二乘法编写的Mathcad程序对实验数据进行线性回归,计算出动力学参数,同时讨论了多试样试验求解表观非等温动力学参数的方法.研究结果表明:所采用的动力学参数求解方法试验量少,可显著降低外界因素引起的误差.所计算出的动力学参数值能够较准确地描述PET-102漆包线绝缘漆的热老化过程.对于多试样总体,所应用的表观动力学参数的计算方法比平均值法准确可靠.     

聚苯硫醚砜酮共聚物的常压合成与表征

采用4,4’-二氯二苯砜和4,4’-二氟二苯甲酮及精制工业硫化钠为反应单体,采用分批投料、逐步聚合的方式,在N-甲基吡咯烷酮中进行常压缩聚．合成了线型高分子量的聚苯硫醚砜酮共聚物（PPSS／K）,考察了不同反应条件对分子量的影响;并用红外、紫外光谱对聚合物结构进行了表征．用TG等手段对聚合物热性能进行了表征,发现该聚合物的玻璃化温度丁。随着酮含量的增加而降低、热稳定性随着酮含量的增加而增加;结果表明,合成的树脂为线型高分子量的PPSS／K树脂,具有优良的热性能。     

精密电阻合金涂漆工艺的探讨

普通漆包线用于电机、变压器及各类电子器件,精密电阻合金漆包线则应用于国防电子工业和各种仪器仪表中,因此对它在电气、机械性能上都有严格要求,特别要求电阻温度系数(α)小,电阻率(ρ)高,电阻稳定性(ε)好,对铜热电势(Ecu)低,而其中某些性能与涂漆工艺有关,这样在涂漆中就要采取特别的工艺措施,否则会影响漆包线的质量。     

含1,3,5-三嗪结构聚芳醚高性能聚合物的合成

1,3,5-三嗪基聚合物具有优异综合性能,但传统1,3,5-三嗪基聚合物难溶解、难熔融,通常在高温高压下才能制得高分子量聚合物,限制了其在分离膜、绝缘漆和粘合剂等领域的应用。文中基于分子设计理论,分别在聚合物分子链中引入柔性侧基、非对称性结构、扭曲或扭曲非共平面结构等,合成了系列既耐高温又可溶解的含1,3,5-三嗪结构新型聚芳醚高性能聚合物,探讨了分子结构等对聚合物溶解性、热性能和力学性能间影响规律。     

不饱和聚酯／聚氨酯互穿网络聚合物基玻璃纤维增强 …

研究了以不饱和聚酯／聚氨酯互穿网络聚合物为基的玻璃纤维复合材料的动态热机械性能及应用性能。结果表明,在不饱和聚酯树脂中加入５％－１０％的聚氨酯,使基质形成互秀利于提高由此得到的复合材料的性能。     

离子注入聚合物表面改性的研究

离子注入聚合物材料表面改性有着独特的优越性。综述了离子注入技术对聚合物表面的机械性能、电学性能、光学性能和磁学性能等方面改性的最新研究与应用进展。     

氧化石墨烯的改性及其聚合物复合材料的研究进展

石墨烯具有优良的热性能、机械性能和电性能,填充少量石墨烯即可提高复合材料的性能。从石墨烯的制备开始,介绍了石墨烯的化学改性方法,包括羧基、羟基、环氧基的改性以及非共价键功能化和聚合物功能化的研究进展;总结了聚合物/石墨烯复合材料的制备方法以及聚合物/石墨烯复合材料的应用并展望了石墨烯及其复合材料的发展方向。     

离子注入技术改性聚合物薄膜的研究进展

离子注入技术改性聚合物薄膜在电子及电器工程中有着巨大的潜在应用价值。综述了近年来聚合物薄膜经离子注入后在导电性能、光学性能、导磁性能及表面力学机械性能等方面的最新进展。分析了注入离子与聚合物相互作用的物理过程,并指出了该领域存在的问题及发展方向。     

蒸发对新型聚芳醚腈酮超滤膜性能的影响

以聚芳醚腈酮(PPENK)为膜材料,以氮甲基吡咯烷酮为溶剂及添加剂制成稳定的铸膜液,使用水为凝胶浴,相转化法制备PPENK超滤膜．研究了铸膜液在空气中的蒸发温度及时间对超滤膜孔隙率、孔结构、纯水通量及截留率等膜性能的影响．结果表明,在实验室所选择的蒸发时间和蒸发温度范围内这两种因素对超滤膜性能影响不大,通过控制合适的蒸发时间和蒸发温度,可以制得具有高通量和高截留率而且表面无缺陷结构高质量超滤膜．     

PPENK增韧改性BMI树脂体系的制备与性能

采用溶液法制备了杂萘联苯聚芳醚腈酮(PPENK)/双马来酰亚胺树脂(BMI)共混体系。通过差示扫描量热法(DSC)对共混体系固化反应动力学进行了研究,固化活化能为85.8 kJ/m2。采用冲击和拉伸实验考察了PPENK含量对共混体系力学性能的影响,共混体系的冲击强度为1.83 kJ/m2～2.95 kJ/m2,拉伸强度为68 MPa～84 MPa,拉伸模量为1.14 GPa～1.53 GPa。通过对固化物断面的扫描电镜(SEM)分析了增韧机理,改性后的BMI树脂在断裂时发生了塑性变形。通过热重分析法(TGA)研究了体系的耐热性,共混体系在氮气气氛中5%热失重温度为420℃～426℃。     

含二氮杂萘酮联苯结构高性能工程塑料研究进展

介绍了含二氮杂萘酮联苯结构聚芳醚砜酮、聚芳醚腈砜酮以及同时还含芳基均三嗪环结构聚芳醚三大系列新型高性能工程塑料的合成与性能及其在高性能树脂基复合材料、绝缘漆、漆包线、功能涂料以及耐高温功能膜等领域的研究进展。从分子结构设计出发,研制成功具有扭曲、非平面结构特点的含二氮杂萘酮联苯结构新型单体,进而与双卤单体经亲核取代逐步聚合反应合成了多系列含二氮杂萘酮联苯结构新型聚芳醚类高性能工程塑料,既耐高温又可溶解,解决了传统高性能工程塑料不能兼具耐高温可溶解的技术难题。其玻璃化转变温度达250～375℃,5%热失重起始温度均高于500℃;可溶解于N-甲基吡咯烷酮、N,N-二甲基乙酰胺以及氯仿等几种有机溶剂;综合性能优异,尤其是在高温下依然保持优异的综合性能;可多种方式加工,不仅可采用模压、挤出、注射等热成型加工,还可采用溶液方式加工应用;广泛应用于航空航天、核能、电子电气等高技术领域和国民经济众多行业部门。     

Flexible magnetic copolymer films with high decomposition temperature and stable dielectric properties

Two novel kinds of flexible magnetic copolymer films were prepared via copolymerization using magnetic ferrocenyl prepolymer (MFP) and poly(arylene ether nitrile)s with bisphthalonitrile functional group. Two types of poly(arylene ether nitrile)s with bisphthalonitrile functional group were used and two series of flexible magnetic copolymer film with different structure were obtained. The magnetic properties of copolymer films indicated that the films were soft magnetic. Moreover, it was also concluded that the magnetic properties of magnetic films prepared from phthalonitrile terminated poly(arylene ether nitrile)s were higher than that of magnetic films prepared from poly(arylene ether nitrile)s with pendant phthalonitriles at the same content of MFP. The results of thermogravimetry showed that the all of the copolymer films possessed high decomposition temperature. Like the magnetism, the dielectric constant and dielectric loss of films obtained from phthalonitrile terminated poly(arylene ether nitrile)s were also higher than that of films obtained from poly(arylene ether nitrile)s with pendant phthalonitriles.     

质子交换膜材料磺化聚芳醚腈酮酮的合成及性能表征

用4-(4-羟苯基)二氮杂萘酮(DHPZ)、3,3′-二磺酸钠-4,4′-(4-氟苯甲酰基)苯(SDFKK)、2,6-二氯苯腈(DCBN)以及4,4′-(4-氟苯甲酰基)苯(DFKK),通过缩合共聚反应成功合成了一系列不同磺化度、高分子量的磺化聚芳醚腈酮酮(SPPENKKs).利用红外光谱(FT-IR)与核磁共振谱图(1H-NMR)证明了聚合物分子结构,利用热重分析仪(TGA)研究了氢型聚合物膜的耐热性能.以N-甲基吡咯烷酮为溶剂,用溶液涂敷法成功制备了具有良好韧性的SPPENKKs均质膜.利用乌氏粘度计测定聚合物的粘度,并研究了不同磺化度的聚合物膜的溶解性能、保水能力、热稳定性能、质子传导率等性能.     

季铵化聚醚砜酮的制备及其膜性能

以浓硫酸为溶剂,氯甲基丁醚、三甲胺为改性试剂,通过氯甲基化／季铵化两步反应制备了季铵化聚醚砜酮(QAPPESK)。详细讨论了两步反应的影响因素。对氯甲基化聚醚砜酮(CMPPESK)进行了^1H—NMR核磁表征,测试了CMPPESK、QAPPESK的溶解性和5％热失重温度。将此材料制备成纳滤膜用于染料脱盐,并考察了其耐酸性和抗污染性,发现QAPPESK是较为优异的膜材料。     

新型磺化聚醚砜酮复合纳滤膜

以含二氮杂萘酮结构新型聚醚砜酮超滤膜为底膜,以磺化聚醚砜酮为复合膜层材料制备复合纳滤膜,研究了浸涂稀溶液组成（磺化聚醚砜酮含量、磺化度、添加剂等）、热处理温度及时间等对复合膜性能的影响,考察了复合膜的耐热性能。     

Preparation and thermal properties of soluble poly(phthalazinone ether sulfone ketone) composites reinforced with multi-walled carbon nanotube buckypaper

A nanocomposite with soluble high-performance poly(phthalazinone ether sulfone ketone) (PPESK) as matrix and multi-walled carbon nanotube buckypaper (MWCNT-BP) as reinforcement was fabricated by hot-press processing. The morphologies, dynamic and static mechanical behavior, thermal stability of the MWCNT-BP/PPESK composites were studied using scanning electron microscope (SEM), dynamic mechanical analyzer (DMA) and thermogravimetric analyzer (TGA). SEM microphotographs revealed a high impregnation degree of the MWCNT-BP/PPESK composites. Dynamic and static mechanical analysis revealed that the nanocomposites possessed high storage modulus, and good retention rate of mechanical strength even at 250 °C, which is mainly attributed to satisfied impregnation and strong interactions between MWCNT-BP and PPESK. Thermogravimetric analysis exhibited that the nanocomposites had excellent thermal stability. These investigations confirm that MWCNT-BP can be effectively used to manufacture high-loading CNT/PPESK composites with improved properties.     

Phase Behavior,Thermal Stability and Rheological Properties of PPEK／PC Blends

Phase behavior,thermal stability and rheological properties of the blends of poly(phthalazinone ether ketone)(PPEK) with bisphenol-A polycarbonate(PC) prepared by solution coprecipitation were studied using differential scanning calormetry(DSC),Frourier-Transfrom IR spectroscopy(FT-IR),thermogravimetric analysis(TGA) and capillary theometer. The DSC results indicated that PPEK/PC blends are almost immiscible in full compositions.FT-IR investigation showed that were no apparent specific interactions between the constituent polymers.The blends keep excellent thermal stability and the addition of PC degrades the thermal stability of blends to some degree.The thermal degradation processes of the blends are much similar to that of PC.The studies on rheological properties of blends show that blending PPEK with PC is beneficial to reducing the melt viscosity and improving the appearance of PPEK.     

Effect of multiwalled carbon nanotubes on the crystallization and dielectric properties of BP-PEN nanocomposites

In this work, polymer-based nanocomposite films formed from biphenol poly(arylene ether nitrile) (BP-PEN) and multiwalled carbon nanotubes (MWCNTs) were successfully prepared by the solution casting method combined with continuous ultrasonic dispersion technology. The micromorphology, thermal, mechanical and dielectric properties of the nanocomposite films were investigated in detail. Non-isothermal crystallization behavior studies indicate that the presence of MWCNTs enhances the crystallization of BP-PEN in the nanocomposites, which is consistent with the XRD analysis. Most importantly, it could be observed that the film containing 0.8 wt% MWCNTs reached the maximum crystallinity. Although, incorporation of MWCNTs did not obviously increase the mechanical of the films, all the nanocomposite films still exhibited excellent mechanical strength. The SEM micrographs of the nanocomposite films showed that the MWCNTs were uniformly coated by BP-PEN crystals, and indicating significantly improved nucleation ability of MWCNTs for polymer crystallization.