1990—1991年国外聚苯硫醚工业进展

介绍国外聚苯硫醚工业进展。内容包括生产能力、应用及消费分配。对聚苯硫醚合成工艺进展、新品种研制开发及PPS合金作了叙述。     

聚苯硫醚的成型加工技术

叙述聚苯硫醚（PPS）作为一种性能优异的特种工程塑料，同时又是一种结晶性能热塑性树脂的性能特点及应用；论述了PPS的工艺特性，模具温度与结晶度的关系；介绍了PPS制品和模具的设计中应考虑 ;乡下离PPS制品的注塑工艺，后处理工艺以及超声波焊接工艺。     

聚苯硫醚复合材料耐磨性研究进展

对聚苯硫醚(PPS)复合材料耐磨性的研究进展进行了综述,并展望了PPS耐磨材料的发展前景。     

PPS/PET裂片纤维的研制

以聚苯硫醚(PPS)和聚对苯二甲酸乙二醇酯(PET)为原料,采用复合纺丝技术,制成单丝线密度2～3dtex的PPS/PET裂片纤维。介绍PPS/PET裂片纤维的最佳复合纺丝工艺,讨论各工艺参数对纤维物理性能指标的影响。试验制得的裂片纤维截面清晰,经碱处理后得到的超细PPS纤维的直径为5μm左右。     

The effect of modified starches on the adsorption of cigarette mainstream smoke composition

In this work modified starches such as porous starch (PS) and cross‐linked phosphorylated porous starch (PPS) were used as tobacco filter to investigate their adsorption efficiency on the tar, ammonia (NH₃), hydrocyanic acid (HCN), crotonaldehyde, and total particulate matter (TPM) in mainstream cigarette smoke. The pore properties and structural stability of the modified starches have been evaluated and the adsorption relationship between the modified starches and the main toxicants in tobacco smoke has also been established. Analytes of mainstream smoke from experimental cigarettes show reductions in yields of some measured constituents in mainstream cigarette smoke, such as tar, HCN, NH₃, crotonaldehyde, and TPM. The largest reductions are for NH₃ levels, up to 35.93% in one case, observed from the tobacco filter containing PPS. The largest reductions in mainstream yields of HCN (13.04%) and crotonaldehyde (31.06%) smoke toxicants were also observed. These results indicate that reducing exposure to some smoke toxicants is possible using the modified starches such as PS and PPS as tobacco filter.     

基于电网安全稳定控制平台的备自投

针对备自投应用于高压电网出现的新问题,提出了利用功能强大的电网安稳平台的解决方案。利用安稳的软、硬件平台,可以实现更多的采集输入、控制输出和控制逻辑,为解决高压电网备自投创造了极好的条件。对高压电网备自投中的环网接线、多级备自投、小电源、母线故障、旁路代路、安稳切负荷、运行方式的自适应问题进行了总结和分析。经过实验室和工程中应用的验证,证明方法可行有效。     

基于Kalman滤波的目标信号TOA测量校正

多点定位系统中,目标信号TOA测量精度直接决定了系统对目标的定位精度,而目标信号TOA测量精度取决于提供系统时钟的晶振的准确度和稳定度。针对多点定位系统中目标信号TOA测量准确度的具体问题,分析晶振频率偏移和GPS秒脉冲抖动对TOA测量准确度的影响,导出基于Kalman滤波的目标信号TOA测量校正方法。数值仿真证明此方法可以有效地改善目标信号TOA的测量准确度,对提高多点定位系统定位性能具有较强的现实意义与实用价值。     

原位反应法制备CuO/PPS复合涂层及其表征

利用CuSO4与NaOH在PPS涂料中原位反应的方法掺杂CuO、通过浸涂制备了CuO/PPS复合涂层,利用XRD分析了原位反应的产物,热重分析仪测试了涂层的热性能,销盘式磨损实验机测试了涂层的摩擦学性能,采用SEM观察分析了磨损表面,并在此基础上探讨了磨损机理。结果表明:CuO/PPS复合涂层的表面平整光洁。原位反应的产物为CuO,复合涂层的热稳定性较纯PPS树脂有所提高,热分解温度提高到536℃;CuO的加入使PPS复合涂层摩擦学性能得到明显改善,添加1.5%CuO时,摩擦因数从0.44减小到0.26,相应的磨耗降低为原来的1/3。同时发现在相同实验条件下涂层的磨损机理随CuO添加量的增加,从粘附磨损依次向磨粒磨损和疲劳磨损过渡。     

Ceramic and polymeric solid electrolytes for lithium-ion batteries

Lithium-ion batteries are important for energy storage in a wide variety of applications including consumer electronics, transportation and large-scale energy production. The performance of lithium-ion batteries depends on the materials used. One critical component is the electrolyte, which is the focus of this paper. In particular, inorganic ceramic and organic polymer solid-electrolyte materials are reviewed. Solid electrolytes provide advantages in terms of simplicity of design and operational safety, but typically have conductivities that are lower than those of organic liquid electrolytes. This paper provides a comparison of the conductivities of solid-electrolyte materials being used or developed for use in lithium-ion batteries.