Electroactive polymers containing 3-arylcarbazolyl units as hole transporting materials for OLEDs

Monomers and their polymers containing 3-arylcarbazolyl electrophores have been synthesized by the multi-step synthetic route. The materials were characterized by thermo-gravimetric analysis, differential scanning calorimetry and electron photoemission technique. The polymers represent materials of high thermal stability having initial thermal degradation temperatures in the range of 331–411 °C. The glass transition temperatures of the amorphous polymeric materials were in the rage of 148–175 °C. The electron photoemission spectra of thin layers of monomers showed ionization potentials in the range of 5.6–5.65 eV. Hole-transporting properties of the polymers were tested in the structures of organic light emitting diodes with Alq₃ as the green emitter. The device containing hole-transporting layers of polyether with 3-naphthylcarbazolyl groups exhibited the best overall performance with a maximum current efficiency of 3.3 cd/A and maximum brightness of about 1000 cd/m².     

H-bond and conformations of donors and acceptors in model polyether based polyurethanes

The molecular mechanics (MM) method with COMPASS force field was used to study the H-bonds in the polyether based polyurethane model molecules. Availability of the calculation was firstly verified in comparison of some H-bonded model molecules, which were studied by using ab initio calculation, and those calculated by MM. Based on a urethane model molecule 1,3-dimethylcarbamate, which can be donor or acceptor and behaves in various conformations, it is reasonable to have a large number of H-bond interactions between various conformational donors and acceptors. For examining all the possible interaction patterns, we studied 57H-bond complexes. This systematic modeling covers well-known four types of interaction patterns, such as NH?OC (Type I), NH?O-CO (Type II), NH?NH (Type III), NH?COC (Type IV) in the system. Obtained H-bond energies were used to analyze the probabilities of the complexes. For the interaction within the hard segments, or Type I, Type II and Type III, a predominant H-bond complex has been found in the present study, which belongs to Type I. For the interaction between the hard segment and the soft segment, two conformations of Type IV were calculated to be existed.     

防垢剂BZF－2的研制与应用

桩西油田产出原油综合含水已达６０％－７０％，原用防垢剂ＨＥＤＰ已失去有效抑制集输站结垢的性能。本工作针对结垢最严重的桩５２站的应用，研制了以有机膦化合物和聚氧乙烯醚为主成份的防垢剂ＢＺＦ－２，在室内考察了不同条件下的防垢率、腐蚀性、配伍性等性能，在桩５２站进行了为期４个月的现场试验，加量为１０．３ｍｌ／ｌ、防垢率≥９８．０％，加药设备管线的腐蚀率大大降低。     

Synthesis and applications of heterobifunctional poly(ethylene oxide) oligomers

Poly(ethylene oxide) (PEO) oligomers are employed extensively in pharmaceutical and biomedical arenas mainly due to their excellent physical and biological properties, including solubility in water and organic solvents, lack of toxicity, and absence of immunogenicity. PEO can be chemically modified and reacted with, or adsorbed onto, other molecules and surfaces. Sophisticated applications for PEO have increased the demand for PEO oligomers with tailored functionalities, and heterobifunctional PEOs are often needed. This review discusses the synthesis and applications of heterobifunctional PEO oligomers possessing amine, carboxylate, thiol, and maleimide functional groups.     

聚醚多元醇中间品钾（钠）离子的快速测定方法

本法采用乙醇水溶解试样，以经过处理的无钾，钠离子聚醚鸩元醇作为基体，配制标准样品，用火焰光度法检测聚醚多元醇中间品的钾（钠）离子的含量。由于样品处理简单，应用浓度直读取数据，可快速准确地测定试样，适用于聚醚多元醇生产过程中间品的检验。     

新型单组分聚氨酯防水涂料的研制

由异氰酸酯、聚醚多元醇和各种助剂制成不含焦油、不含溶剂的单组分湿固化聚氨酯(PU)防水涂料。讨论了聚醚配比、体系中水份及酸碱度等影响因素。该涂料具有性能优良、使用方便、对环境无污染等优点。经济效益和社会效益显著 ,具有广阔的发展前景     

易染性共聚醚酯热氧化稳定性研究

分析了高聚物的氧化裂解机理及抗氧化剂的作用原理。选择了对提高共聚醚酯的热稳定性较为有效的复合抗氧化剂，用测定该共聚醚酯的特性粘度和端羧基含量改变的方法来表征分子量的变化，证实了抗氧剂的作用机理和复合抗氧化剂之间的协同效应     

泡沫塑料吸附-MBIK萃取-原子吸收法测定矿石中低品位金

探讨了矿石中低品位金的测定。以王水溶解试样,用聚醚泡沫塑料吸附金,将泡沫塑料消解后,以ＭＩＢＫ萃取金,用火焰原子吸收光谱测定。方法已成功地应用于铜矿物中低品位金的测定,结果令人满意。     

真空成型压力参数对汽车用DF增强PES树脂材料力学性能的影响

在碳纤维 (DF) 内加入聚醚砜 (PES) 树脂法, 利用真空辅助成型 (VARI) 工艺制备得到改性复合材料, 研究真空成型压力参数对汽车用DF增强PES树脂材料力学性能和拉伸断面的影响。研究结果表明:相对于改性前的PES树脂材料拉伸强度, 经过0.1、0.25与0.5 MPa处理得到的改性复合材料在拉伸强度方面依次提升了17.36%、41.39%与29.54%;拉伸模量依次提升1.61%、19.35%与10.48%。相对于原始纤维, 经过改性形成了更加粗糙的表面结构, 使纤维与树脂可以发生更加紧密的结合, 经过改性的PES树脂材料形成的断口具有明显的韧性断裂特点。在0.25 MPa下得到的改性PES树脂材料形成了明显断口结构, 此时的试样获得了最优的拉伸强度与模量。     

Effects of Sodium Benzoate and Sodium Chloride on the Aggregation Behaviors of PEO-PPO-ph-PPO-PEO and PPO-PEO-ph-PEO-PPO at the Air/Water Interface

The effect of sodium benzoate and sodium chloride on the aggregation behavior of PEO-PPO-ph-PPO-PEO (BPE) and PPO-PEO-ph-PEO-PPO (BEP) polyethers at the air/water interface was investigated by measuring the equilibrium surface tension, surface dilational viscoelasticity, and surface tension relaxation. The measurements of surface tension showed that sodium benzoate has a better effect on decreasing the surface tension of BPE and BEP solutions than NaCl, especially when the polyether concentrations are low. According to dilational viscoelasticity measurements, the concentration of BPE required for the maximum dilational modulus is lower than that of BEP, indicating that BPE more easily forms a compact adsorbed layer. The dilational modulus values of BPE solutions in the presence of sodium benzoate and NaCl first increase and then decrease after passing through a maximum, and then they increase again with increasing electrolyte concentration. On the other hand, the dilational modulus values of BEP solutions in the presence of sodium benzoate and NaCl first increase to a maximum and then decrease with increasing electrolyte concentration. The surface tension relaxation results are consistent with those of dilational viscoelasticity. The different effects of sodium benzoate and NaCl on the polyether aggregation behaviors are caused by the strong hydrophobic and π-π interactions between polyethers and sodium benzoate. This work has a great importance for the application and development of polyethers.