改性胶粉/SBR共混胶料的结构性能研究

研究了硫黄、促进剂、改性胶粉用量对胶粉／ＳＢＲ共混胶料性能的影响。结果表明；改性胶粉用量在１０－３５份的范围内．对共混胶料的静态力学性能影响不大：在１０－２２份的范围内对动态压缩疲劳生热影响不大．适当调整基质胶中硫黄、促进剂的用量．有利于降低胶料的动态压缩疲劳生热。扫描电子能谱微区分析的研究表明：由于硫黄的迁移形成了具有特殊结构的界面过渡层．该过渡层是降低动态压缩疲劳生热的关键。     

轻型高效精馏塔的计算机辅助设计

论述了在Win9x操作环境下，用Visual Baisc 6.0可视化语言设计界面，用Microsoft Access建立数据库，用Auto CAD VBA编辑绘图程序，以Auto CAD作为平台，开发设计轻型高效精馏塔辅助设计软件。通过对实际设计结果的检验与试用，该软件具有良好的用户界面、人机对活功能和图形功能，使用简单方便，输入初始条件即可设计并绘制出塔结构图。     

机械力化学湿法一步制备表面修饰磷酸锌微粉

以氧化锌和磷酸为原料,以硅烷偶联剂为改性剂,采用机械力化学湿法制备微细磷酸锌并进行表面改性.用XRD、润湿角、活化指数、沉降时间等手段对产物进行表征,用FT-IR对改性粉末的结构进行分析,初步探讨了偶联剂与磷酸锌的作用机理.结果表明产物为二水和四水磷酸锌混合物;在红外区域2 800～3 000 cm-1和1 400 cm-1有偶联剂的特征吸收峰,说明偶联剂与磷酸锌之间发生了化学反应;当硅烷偶联剂添加质量分数由0增加到2%,改性产品的活化指数由0增加到98.71%,对水的润湿角由0°增加到93.21°,沉降时间由0.5 h增加到176 h,在涂料中的分散性和贮存稳定性得到改进.     

混杂增强聚氨酯复合硬质泡沫塑料的研制

系统介绍混杂增强聚氨酯复合硬质泡沫塑料的制备情况，详细分析聚氨酯硬质泡沫塑料制备过程中的工艺问题，表征与分析其结构与性能，着重分析偶联剂对填充物增强性能的影响以及填充物含量对聚氨酯硬质泡沫塑料吸水性能的影响，介绍聚氨酯硬质泡沫塑料的应用，最后指出其发展前景。     

中国煤中硫的分布特征研究

以“中国煤种资源数据库”为基础,结合新采集煤样,对中国不同煤田2237个煤层煤样的硫含量数据进行了统计分析,分不同时代、不同地域和不同煤种讨论了中国煤中硫的分布特征,并总结了煤中硫的分布规律.认为中国煤中硫的含量分布与成煤时代、聚煤地区密切相关.引入“储量权重”概念,按聚煤区储量加权计算,中国煤中平均硫含量为1.02%,该数值比算术平均值(1.40%)更能准确地反映中国煤中硫的含量分布.     

离子色谱法测定配煤、焦炭和焦油中的氯含量

研究了用带电导检测器的离子色谱对配煤、焦炭和焦油中的Cl- 进行测定的方法。在YSA型8126A-4# 阴离子分离柱上用3.5mmol/LNa2CO3、5.3mmol/LNaHCO3做淋洗液对Cl-进行测定,方法简便快速。Cl-的检出限为2×10-6。该法也适用于F-、NO2-、NO3-、SO42-等的测定。     

Microstructures and mechanical properties of polypropylene/polyamide 6/polyethelene-octene elastomer blends

A series of polymer blends were designed and manufactured. They are composed of three phases: polypropylene (PP), polyamide-6 (PA6) and polyethylene-octene elastomer (POE) grafted with maleic anhydride. The weight fraction of PA6 was adjusted from 0 to 40% by increments of 10%, and the weight fraction of POE was systematically half that of PA6. The morphology, essentially made of PA6 particles dispersed in the PP matrix, was characterised by scanning electron microscopy (SEM) and transmission electron microscopy (TEM). In the extruded plates prepared with the blends, the shape of the dispersed PA6 particles showed an elongated ellipsoidal shape, whose aspect ratio increased somehow with alloying content. The POE modifier was observed both as a thin interlayer (less than 100 nm thickness) at the PP/PA6 interface, and as a few isolated particles. The elastic modulus and yield stress in tension are nearly constant for PP and blends. By contrast, the notched Izod impact strength increases very much with alloying content. This remarkable effect is interpreted in terms of POE interphase cavitation, enhanced plastic shear deformation and resistance of PA6 particles to crack propagation.