影响橡胶增韧塑料的主要因素

综述了影响橡胶增韧塑料的主要因素,着重探讨了粒子间距对橡胶增韧塑料的影响,最后总结了橡胶增韧塑料的研究重点。     

塑料热水管及其性能评价

本文介绍了几种常用的塑料热水管及其性能评价方法，并对进一步发展塑料热水管提出了建议。     

聚丙烯基木塑复合材料的研究进展

概述了近年来国内外聚丙烯（PP）基木塑复合材料的研究概况，PP和木质材料的界面增容方法以及PP基木塑复合材料的基本性能；并展望了目前国内PP基木塑复合材料的研究方向。     

Numerical Simulation and Experimental Tests on Explosively‐Induced Water Jet Phenomena

This study addresses some aspects regarding water jet propulsion during high explosives detonation. A number of theoretical and experimental studies have shown that using Gurney equation and the relationships derived, one can provide fair results regarding initial velocity of metallic fragments for explosively‐driven metal casings. However, an investigation on Gurney equations utilization for the prediction of water velocity has not been performed yet. By carrying out simple experimental tests and numerical simulations, water has been investigated in terms of total mass average velocity and tip velocity. Based on the available data, the findings indicate that Gurney equations overestimate the water mass average velocity. For water tip velocity evaluation, further studies should be made.     

塑料水龙头壳体模具设计

分析塑料水龙头的成型特点,采用了圆弧抽芯.在设计中,通过分析塑件的结构,采用了一模一腔的模具布局形式.在模具设计过程中,对分型面的设计,浇注系统、冷却系统、脱模机构进行了介绍.经生产验证,模具结构合理,具有一定的推广价值.     

军用塑料包装箱注塑过程内应力研究

近年来,随着工程塑料在军工产品包装领域的广泛应用,如何保证工程塑料包装箱的产品质量已经成为一项重要课题.塑料包装箱的成型方法很多,其中注射成型是主要的成型方法之一.据统计70%-80%的工程塑料、30%以上的塑料制品是用注射成型加工的.但注塑成型过程中产生的内应力严重影响塑料产品的质量,因此有必要对内应力的产生原因、影响因素及改善方法加以分析研究.文章针对内应力对注塑制品形成的危害,研究了减轻和消除内应力的方法.     

水质对AA-MA-AMPS阻垢缓蚀性能影响分析

以水为溶剂,用过硫酸铵一次磷酸盐引发体系合成的AA-MA-AMPS水质稳定剂在p H值较宽的范围都有较好的阻垢缓蚀效果;对钙硬度、碱度、CI-、SO42-有较好的宽容度,在一般水质条件下,这些离子对阻垢缓蚀性能没有太大影响,而总Fe、Cu2+对该稳定剂的缓蚀性能有较为显著的影响,总Fe高于3mg/L、Cu2+高于0.05mg/L时,稳定剂的缓蚀性能显著降低。     

塑料给水管材的开发现状

本文介绍了七种给水塑料管材即铝塑复合管、硬质聚氯乙烯(UPVC)管、交联聚乙烯(XLPE)管、聚丙烯共聚物(PP C)管、聚丁烯(PB)管、ABS管及高密度聚乙烯(HDPE)管的内在特性、适用范围、规格尺寸、连接方法及发展动向。     

Role of Water Activity of Liquid in Controlling Evaporation Rate of Low-Viscosity Liquids

Viscosity of liquid is normally the most critical factor when operating an evaporator in an industrial process. This study shows that the dewatering capacity during evaporation for a low-viscosity peptone solution was reduced 40% for water activity (a _w ) = 0.8 and 80% for a _w  = 0.45. Designers of evaporators should be aware of this phenomenon if the aim is to get a high degree of dry matter concentration in the liquid.     

A Comprehensive Investigation On The Application Of Ozone In Cooling Water Systems –– Correlation of Bench–Top,Pilot Scale and Field Application Data

The first comprehensive study – bench–top laboratory investigations, pilot scale testing, and critical monitoring and evaluation of field applications – addressing the effects of ozone as a stand–alone cooling water treatment program is presented. The study also represents the first critical comparison of ozone–treated systems with non–treated systems. Excellent corrosion control can be attained in ozone–treated cooling water systems. However, the corrosion rates are completely dominated by the water chemistry of the system and have no dependence on the presence of ozone at typical use levels. Good control of fouling can also be attained. However, as was the case with corrosion control, deposition on the heatexchange surfaces is not determined by the presence of ozone, but by several factors that traditionally influence fouling in a system. The strong biocidal properties of ozone resulted in excellent microbiological control in all Pilot Cooling Tower (PCT) investigations and in both case studies. Excellent agreement was observed among all stages of testing.     

Comparison of Foliar Spray Efficacy of Electrolytically Ozonated Water and Acidic Electrolyzed Oxidizing Water for Controlling Powdery Mildew Infection on Cucumber Leaves

We investigated and compared the effects of foliar sprays of electrolytically ozonated water (OW) and acidic electrolyzed oxidizing water (AEOW) on severity of powdery mildew infection (PMI) and occurrence of visible physiological disorder on cucumber leaves. Foliar spray of OW contained severity of PMI to almost the same level as the initial value, without any visible physiological disorder. Although severity of PMI on AEOW-sprayed leaves was significantly lower than on OW-sprayed leaves, the leaves showed a visible physiological disorder after the first spray. These results indicate that OW is a viable option for controlling PMI on cucumber leaves at low initial severity levels, or for prevention of PMI, and that AEOW can be used for controlling PMI with special efforts taken against a visible physiological disorder.     

不同杀菌剂防治小麦赤霉病的田间筛选试验

为筛选防治小麦赤霉病的高效药剂,对25%氰烯菌酯SC、42%咪鲜·甲硫灵WP、50%咪鲜胺WP、400 g/L戊唑·咪鲜胺EW和25%多·酮WP进行筛选试验。试验证明:25%氰烯菌酯SC、42%咪鲜·甲硫灵WP和25%多·酮WP对小麦赤霉病的防治效果较好,其用药适期为小麦齐穗扬花期,最佳用药量为25%氰烯菌酯SC 1500 mL/hm2、42%咪鲜·甲硫灵WP 1200 g/hm2和25%多·酮WP 1800 g/hm2,最终防治效果均在85%以上。     

超临界二氧化碳萃取中试装置的工艺改进

分析了目前国内使用的超临界流体萃取装置的不足,并对其进行了改进,设计出适合以二氧化碳为萃取介质的中试装置。超过34000h的试用结果表明：该装置使用简单、操作安全、密封可靠,能满足多种原料的萃取要求,总体性能与进口设备相当,但造价低于进口设备,具有较高的应用价值。     

Study of Water Absorption Behavior in Wood Plastic Composites by Using Neutron Radiography Techniques

Abstract

Neutron radiography (NR) technique has been adopted to study the water absorption behavior of different kinds of wood plastic composites (WPC). The cold neutron radiography facility (CNRF) of Japan Research Reactor (JRR‐3M) was used in this work. Profiles of the absorbed water thickness of the samples are easily observed and measured from the radiography images. A small difference between NR image data and the measured data has been observed. That water absorption in these composites increases with time is clearly observed from the NR images.     

玻璃厂消防水系统与生产水系统的结合应用

消防水系统与生产水系统合用时,确保消防水量不作他用的技术措施。     

Investigation of the Effect of Molding Variables on Sink Marks of Plastic Injection Molded Parts Using Taguchi DOE Technique

The quality of an injection molded part is affected by material properties, mold geometry, process conditions etc. Obtaining optimum process conditions and mold design is the key problem to improve the part quality. Sink mark is one of several important flaws of injection molded parts. In this article, numerical simulation is combined with Taguchi design-of-experiment (DOE) technique to investigate the influence of process conditions and cavity geometry on sink mark of the injection molded part and optimize process conditions and cavity geometry. An L18(3⁷) orthogonal array based on the Taguchi method was conducted to minimize the sink marks of injection molded parts, and the significance of each factors on sink mark was investigated. For the factors selected in the main experiments, part thickness, holding pressure, melt temperature and mold temperature were found to be the principal factors affecting the sink marks of the injection molded parts.     

新型塑料管材的性能及在给排水工程中的应用

介绍新型塑料管材的种类、物理以及化学性能，结合其在给水排水管道工程中的应用情况，分析评述新型塑料管材在使用中存在的问题，指出了今后在生产和使用方面的发展趋势。     

输油管道瞬变水击研究

针对输油管道瞬变水击产生的原因,从所产生的增压波和减压波分别对上下游流动的影响两方面分析了水击对输油管路带来的危害,并结合调节阀保护、压力保护系统与增强自动控制系统保护能力等简述了减小水击压力对管道危害的几种措施,得出采取有效的管路压力保护系统对输油管道安全运行具有重要意义。     

高层建筑中给排水节水技术研究

当前,建筑给排水与人们的生活息息相关,优质的安装施工质量和科学的管理是保障管网系统高效安全运行的必要条件.本文在分析探讨了生活给水系统,排水系统和节水系统后,提出在完善使用功能、外型美观的前提下,还必须重视节水问题.     

Reviewing the 20 Years of Operation of Ozonation Facilities in Hanshin Water Supply Authority with Respect to Water Quality Improvements

More than 20 years have passed since the introduction of advanced water treatment with ozonation and granular activated carbon in the Hanshin Water Supply Authority. Significant improvements have been achieved in eliminating taste and odor compounds in water and in suppressing the formation of disinfection by-products. Regarding the bromate ion, we have managed to suppress its formation by keeping the residual ozone concentration and pH low.