Seydel-860拉断机生产正规腈纶毛条的探讨

研究了工艺、设备及公用工程对Ｓｅｙｄｅｌ－８６０拉断机生产正规腈纶毛条缩率的影响,试验表明：热拉伸倍数１．２２～１．２５,车速１５０～１６０ｍ／ｍｉｎ,蒸汽温度１３０～１６０℃,传送带速度调整到适当值时,Ｓｅｙｄｅｌ－８６０拉断机生产的正规腈纶毛条缩率低。     

聚乙烯醇改性膨胀石墨对甲基橙模拟废水的脱色性能

以天然鳞片石墨为原料,聚乙烯醇缩丁醛（PVB）、聚乙二醇（PEG）及聚乙烯醇（PVA）为改性剂,采用浸渍法制备改性膨胀石墨（EG）。研究改性EG对甲基橙（MO）模拟废水的吸附脱色性能,并对其等温吸附类型及吸附动力学进行研究。结果表明：经PVA改性后,EG的比表面积、孔隙容积均高于未改性EG。PVB、PEG和PVA改性EG对MO模拟废水的脱色率分别为76%、77%和98%,而未改性EG的脱色率仅为67%。吸附规律遵循了Langmuir吸附等温式和准2级动力学方程。     

设备状态监测系统的DL/T860建模及智能化设计

状态监测是获取设备运行状态的技术手段,是检修与运维的重要信息来源。根据面向智能电网的设备状态监测系统智能化的建设及改造需求,给出了基于DL/T860标准通信规约的从变电子站到主站的全面设计方案,解决了IED的标准化、互操作性和互换性问题,实现了信息共享,为生产管理、状态检修、智能电网决策分析提供所需要的数据,为实用化的状态监测技术应用、选型积累经验。     

可膨胀石墨在膨胀阻燃体系中协同阻燃作用的研究

采用氧指数(LOI)、扫描电镜(SEM)、热重分析(TG)等技术手段对可膨胀石墨(EG)与膨胀型阻燃剂(IFR)协同阻燃线性低密度聚乙烯(LLDPE)体系进行了研究.结果表明,EG与IFR复配,体系氧指数明显提高,其热稳定性增强,热降解速率降低,残炭率提高,燃烧炭层连续致密,EG与IFR具有很好的协同阻燃作用.热分析及扫描电镜结果证明,EG与IFR的协同阻燃作用机理的关键在于凝聚相成炭.     

聚酯产业链的生产和需求动向

介绍了世界乙二醇、精对苯二甲酸、聚对苯二甲酸乙二酯及其纤维,瓶用树脂等聚酯产业链的生产新动向和需求预测。     

Research progress on polymer-inorganic thermoelectric nanocomposite materials

A thermoelectric (TE) material is a material where a potential difference is generated as a result of a temperature difference or the corollary of this where a temperature difference is generated when a voltage is applied. These phenomena can be used to generate electricity and/or control temperature. Traditionally, thermoelectric materials are inorganic semiconductors which have been limited in their application by low efficiency and high cost. Since the 1990s, both theoretical and experimental studies have shown that low-dimensional TE materials, such as superlattices and nanowires, can enhance the value of the TE figure of merit (ZT) which is an indicator of TE thermodynamic efficiency. To date it has not been feasible to apply these materials in large-scale energy-conversion processes because of limitations in both their heat transfer efficiency and cost. When compared to inorganic materials, organic conducting polymers possess some unique features, such as low density, low cost, low thermal conductivity, easy synthesis and versatile processability and their use in preparing polymer-inorganic TE nanocomposites appears to have great potential for producing relatively low cost and high-performance TE materials. Recently, an increasing number of studies have reported on polymeric and polymer-inorganic TE nanocomposite materials. The purpose of this paper is to review the research progress on the conducting polymers and their corresponding TE nanocomposites. Its main focus is the TE nanocomposites based on conducting polymers such as polyaniline (PANI), polythiophene (PTH), poly (3, 4-ethylenedioxythiophene): poly (styrenesulfonate) (PEDOT:PSS), as well as other polymers such as polyacetylene (PA), polypyrrole (PPY), polycarbazoles (PC) and polyphenylenevinylene (PPV). Typically, polymer-inorganic TE nanocomposites are produced by physical mixing, solution mixing and in situ polymerization. The key factors that limit the use of these polymers and their polymer-inorganic TE nanocomposites as TE materials are their low ZT values. More recent developments designed to overcome the limitation including, for example, the use of carbon nanotubes and graphenes and the use of computational modelling to accelerate the selection of suitable pairs of conductive polymer and inorganic TE materials to achieve best possible nanocomposites are reviewed.     

高抗冲聚苯乙烯/微胶囊红磷/膨胀石墨阻燃材料的制备及性能研究

用熔融混合法制备了高抗冲聚苯乙烯(HIPS)/微胶囊红磷(MRP)/膨胀石墨(EG)无卤阻燃材料.用氧指数法、垂直燃烧及热重分析等方法研究了EG/MRP复配阻燃剂对高抗冲聚苯乙烯的阻燃作用,并对阻燃前后的HIPS复合阻燃材料进行了红外分析。结果表明,MRP和EG复配,可以使HIPS的氧指数提高到27%,垂直燃烧级别达到FV-0(1.5 mm);但是MRP与EG之间不存在协同阻燃效应;复配阻燃剂的作用机理为凝聚相阻燃机理,抗滴落剂的加入可以有效阻止材料燃烧时的滴落,提高材料的阻燃级别。     

微波辅助废旧PET聚酯解聚反应研究

采用微波辅助加热的方式研究了回收PET聚酯的乙二醇解聚反应,并对比了相同催化作用下常规加热条件下的解聚反应,对解聚反应产物BHET进行了熔点测定和IFTIR分析.结果显示,两种方法下控制解聚反应至PET聚酯完全转化时单体BHET的收率相差不大,微波辅助条件下单体的收率略高,但是反应时间大大缩短.反应物PET与EG在1:...     

基于MPC860的嵌入式VPN的开发

本文以MPC860为硬件平台详细说明了嵌入式VPN系统开发步骤,实现了基于IPSec协议的嵌入式安全网关. 最后对已经实现的原型系统做了系统测试和分析.测试表明,设计的系统正常工作.     

基于MPC860的数据采集接口的设计与实现

MPC860是一款功能强大的嵌入式通信处理器,但由于缺乏集成数据采集外设,限制了其在控制领域的应用,因此,提出了一种基于AD7862结合CPLD控制的数据采集接口实现方法;利用AD7862的双采样保持功能完成双通道同时采样,用多路开关扩展采样通道数,CPLD完成对采样通道选择、采样频率的设定、采样结果读取/存储以及数字I/O扩展功能;CPLD与MPC860之间通过数据地址总线连接,并由MPC860的GPCM控制器对CPLD进行总线时序控制;给出了详细的软硬件设计,经实际应用测试满足了系统的信息采集需求,实现了接口扩展目的.