导电聚苯乙烯型胶带的性能研究及工艺控制

系统介绍了导电型聚苯乙烯型胶带从粒料到最终产品的生产工艺，分析了各种工艺参数对导电型聚苯乙烯胶带的拉伸强度、柔韧性、表面电阻等性能及产品收率的影响。通过进一步的试验，优化了胶带片材挤出、片材分条及胶带成型的工艺参数。     

LM-1耐溶剂型美纹纸保护压敏胶带的研制和开发

天然橡胶在开炼过程中由于热氧作用,分子链上会产生羟基。在配好的胶粘剂溶液中,加入RC,通过多异氰酸酯和天然橡胶的羟基以及增粘树脂的羧基进行交联,使胶粘剂的内聚能提高,耐溶剂性增强。交联过程能在胶粘剂的烘干过程中完成,因此烘干工艺和普通美纹胶粘带相同。LM-1胶带能用于分色要求较高的场合,分型清晰,对被粘物无残胶,同时胶粘带的耐温性也有所提高。     

关于若干工艺参数对铺带质量影响的研究

为分析自动铺带成型过程中铺放压力、铺放温度及铺放速度各工艺参数对铺放质量的影响,进而预测铺带过程中预浸带的形变,对带变形和带间隙进行微调控制以保证产品质量,本文在南航自行研制的自动铺带机上进行了一系列实验,并以预浸带黏性流动公式分析探讨了各因素的影响。研究结果表明,随着铺放温度的升高、铺放压力的增加和铺放速度的减小,预浸带变形量增加,带间隙减小,符合以预浸带黏性流动公式为基础的理论分析。     

PTC复层矿脂包覆防腐技术在海上风电的应用

简述了海洋浪花飞溅区腐蚀规律、海上风电钢桩基础腐蚀状况以及复层矿脂包覆系统的防腐性能,介绍了PTC包覆技术在江苏龙源海上风电场潮间带的应用.解决了应用中大尺寸保护罩的紧固工艺、结构异形位置固定修补等材料和施工技术难题.并得出结论：PT℃复层矿脂包覆防腐具有施工方便、基材处理要求低、可带水作业等优点,在腐蚀严重的浪花飞溅区、海生物生长严重的潮差区防腐效果优异,是解决海上风电结构海洋浪花飞溅区、潮差区防腐的有效途径.     

Experiments on the combined use of a double-sided pressure-sensitive tape and an epoxy adhesive to reduce handling time

In many industrial assemblies with structural adhesives, the handling time, i.e. the time to safely move adhesively bonded parts, may slow down manufacturing process and result into additional costs. For that reason, in some cases, the traditional mechanical connections (rivets, bolts, welds) are still preferable when the structure must be completed in a short time. In this work a new type of hybrid joint, characterized by the combined use of an epoxy adhesive and a double-sided pressure-sensitive tape, is proposed and characterized by experimental tests on single-lap joints with a large overlap. The results showed that these hybrid joints allow for reducing the handling time of the joint, preserving approximately the same strength. The proposed solution exploits the non-uniform stress distribution in the bondline of a single-lap joint, resulting in a low stress area at the centre of the overlap. The presence of an adhesive tape in this region produced either a negligible or minor drop (~20%) in strength depending on the epoxy used, while provided the joint with sufficient strength for being handled before the full cure of the epoxy.     

基于两相流型的立式热虹吸式再沸器结果分析

立式热虹吸式再沸器是乙二醇再生与回收系统中的核心设备,针对再沸器气化率低、管程出口管线因气化流型发生振动等问题,采用软件Aspen EDR对管程出口管内径分别为200 mm和300 mm进行了设计对比,通过在换热管内插入扭带对再沸器进行了强化传热.研究了管程出口管内径大小、扭带扭率及扭带厚度变化对气化率和气化流型的影响...     

G3i仪器数据格式分析与应用探讨

G3i仪器作为新型的地震数据采集系统,具有数据格式多样化的特点。本文以G3i地震仪器数据格式分类为切入点,分别对G3i仪器使用的SEG-Y Rev.0硬盘格式、SEG-Y Rev.0磁带格式、SEG-Y Rev.0磁带镜像格式、SEG-D Rev.2磁带格式和SEG-D Rev.2磁带镜像格式的特点进行了分析,在此基础上介绍了数据读取和信息恢复转换的方法。     

熔化靶技术用于在线同位素分离器

将熔化铅靶技术应用于在线同位素分离器。６００ＭｅＶ中能＾１８Ｏ束轰击熔化铅靶的反应产物通过传输管扩散进入离子源,由带传输系统进行了汞同位素的收集和传输。实验观测到了汞的若干同位素的γ射线。     

CST MWS软件模拟三维螺旋线慢波结构

本文介绍了用CST MWS软件的周期边界条件计算行波管螺旋线慢波结构的色散和耦合阻抗等冷测特性的方法,用采取螺旋带模型的理论分析计算结果和实验测试值加以验证,取得了比较一致的结果;并应用这种MWS的模拟方法和螺旋带模型的计算方法分析了具有扇形和T形夹持杆慢波结构的冷测特性,结果表明,相速和耦合阻抗都随着扇形角度的增大而减小,随着T形窄端宽度的增加而减小,随着T形窄端高度的增加而增大.     

Optimization of non-aqueous tape casting of high solid loading slurry for aluminum nitride ceramic substrates

Aluminum nitride (AlN) ceramic substrates have been fabricated using non-aqueous tape casting and pressureless densification under flowing N₂ atmosphere. Considering the economic and environmental impact, a new strategy of solvent and dispersant system was adopted to prepare AlN slurries with high solid loading. According to the viscosity characteristics of AlN slurries, dispersant content was adjusted to be 0.5 wt% of AlN powder in order to optimize the rheological behavior of AlN slurries. The addition contents of binder and plasticizer were both optimized as 5 wt% of AlN powders by combining the viscosity of slurries and tensile strength of green tapes. Green AlN tapes were fabricated with an optimized tape casting process such as dry temperature. The exclusion process of organic additives was investigated by employing thermogravimetric analysis. Flat and dense AlN ceramic substrates with a relative bulk density over 99.75 % were achieved after being sintered under 1800°C for 6 hours, which had a maximum size of 110 × 110 mm. The thermal conductivity of the AlN substrate could reach 145 Wm⁻¹K⁻¹.