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.     

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。     

烷基酚聚氧乙烯醚在油砂上的吸附损失

本文研究了烷基酚聚氧乙烯醚(OP)在高岭土、蒙脱土和井楼油田油砂上的吸附等温线。结果表明,非离子型表面活性剂OP在高岭土上的吸附遵循Langmuir规律。静态和动态吸附试验说明,OP在油砂上的吸附与水溶液含电解质有关,随着金属阳离子的电荷数增加,OP在油砂上的吸附量增加。     

聚氨酯和聚醚改性环氧树脂分子结构和性能的探讨

分子复合结构设计是将一种树脂的特性赋予其他种类树脂，来达到改性和提高固化物性能的目的。本文对聚氨酯和聚醚改性环氧树脂的分子结构及性能作了简要的论述。     

In vitro calcification of UHMWPE/PU composite membrane

Polyurethane composite made from biaxially drawn ultrahigh molecular weight polyethylene (BDUHMWPE) is likely an alternative for polyurethane currently being plagued for medical applications. In this study, an in vitro calcification protocol was used to determine the relative resistance to calcification of the composite membranes. The results demonstrated that the composite membranes were susceptible to extrinsic calcification that was closely related to the matrix polyurethane material used. The calcification of the composite was different from that of the solution cast polyurethane membranes. The incorporation of hydrophobic reinforcement BDUHMWPE effectively postponed the calcification. The differences of calcification between composite and polyurethane were greatly due to the differences in surface structures and properties of the as-cast polyurethane.     

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。     

纸浆消泡剂的合成及性能试验

研制了一种高效无毒纸浆消泡剂,其基本结构是聚醚的高级脂肪酸酯。并对酯化方法(包括催化剂的选择)和聚醚的分子量等进行了研究。     

Solid polymer electrolytes V: microstructure and ionic conductivity of epoxide-crosslinked polyether networks doped with LiClO4

A crosslinked polyether network was prepared from poly(ethylene glycol) diglycidyl ether (PEGDE) cured with poly(propylene oxide) polyamine. Significant interactions between ions and polymer host have been observed for the crosslinked polyether network in the presence of LiClO₄ by means of FT-IR, DSC, TGA, and ⁷Li MAS solid-state NMR. Thermal stability and ionic conductivity of these complexes were also investigated by TGA and AC impedance measurements. The results of FT-IR, DSC, TGA and ⁷Li MAS solid-state NMR measurements indicate the formation of different types of complexes through the interaction of ions with different coordination sites of polymer electrolyte networks. The dependence of ionic conductivity was investigated as a function of temperature, LiClO₄ concentration and the molecular weight of polyether curing agents. It is observed that the behavior of ion transport follows the empirical Vogel-Tamman-Fulcher (VTF) type relationship for all the samples, implying the diffusion of charge carrier is assisted by the segmental motions of polymer chains. Moreover, the conductivity is also correlated with the interactions between ions and polymer host, and the maximum ionic conductivity occurs at the LiClO₄ concentration of [O]/[Li⁺]=15.