磁性涂镀层测厚仪技术现状与展望

简要叙述了涂镀层测厚技术的发展现状及时代特征，重点介绍了目前国内外磁性涂镀层测厚仪典型产品的功能特点，初步探讨了涂镀层测厚仪技术的未来发展趋势。     

涡流涂镀层测厚仪开发与应用现状

简要介绍了涡流涂镀层测厚技术的基本原理与涡流测厚方法标准概况，重点介绍了涡流涂镀层测厚仪国内外典型产品的功能特征和应用现状。     

涡流涂镀层测厚仪开发与应用现状

本文简要叙及涡流涂镀层测厚技术的基本原理与涡流测厚方法标准概况，重点介绍了涡流涂镀层测厚仪国内外典型产品的功能特征和应用现状。     

涡流涂镀层测厚仪开发与应用现状

在涂装施工和质量检验过程中，涂镀层厚度是一项重要的控制指标，涂镀层厚度的无损检测，迄今已采用了磁性法、涡流法、X射线光谱法、β射线反向散射法等多种检测方法但就上列各种方法应用的广度和深度来说，即磁性法和涡流法的应用更为普遍，其技术进展迅速。专家刘振作先生在本中阐述了涡流涂镀层测厚技术的基本原理与涡流测厚方法标准概况，重点介绍了涡流涂镀层测厚仪国内外典型产品的功能特征和应用现状。     

带微机磁感应法涂镀层数显测厚仪

由机械委沈阳仪器仪表工艺研究所研制的国家七·五期间重点科技项关课题——CH-1000型带微机磁感应法涂镀测厚仪,最近在沈阳通过国家鉴定。各地二十多位专家学者參加了会议。目前国内虽已生产了电磁感应式涂镀层测厚仪,     

德国EPK公司先进的库仑测厚仪

前几期介绍德国 EPK 公司的无损涂镀层测厚仪,对于电镀行业组合镀层及多层镀层,目前仍没有适合工业应用的无损测厚方法,因此,采用阳极溶解原理的库仑测厚仪,仍是电镀业的主要测试仪器。EPK 公司生产的 GALVANOTEST 分为1000、2000、8000型5个规格,采用微处理机技术,存有70多种镀层组合的直接测量程序,具有操作简便、精度高、应用范围广的特点。2000、3000型有统计功能和 RS-232接口,可     

新型涂镀层测厚仪通过鉴定

被列为国家七·五重点科技攻关项目的“电容式涂镀层测厚仪”11月6日在上海机械学院仪器仪表分院通过了专家鉴定。该测厚仪主要用于金属基体上的非导电膜的厚度测定。如油漆涂层、塑料膜及铝氧化膜等。该测厚仪测量范围     

2006年涂镀层测厚技术座谈会在广州召开

2006年11月7日,在广州万豪酒店召开了德国尼克斯涂镀层测厚仪产品技术座谈会。本次座谈会以“推介测厚新技术,促进优秀产品在各行业建设中的扩大使用”为主题,由德国科隆自动检测仪器有限公司中国总代理——北京联合盛朝技贸有限公司主办,广东科能电子仪器有限公司协办。作为2006年涂镀层测厚仪产品的第一次技术座谈会,邀请了部分涂料及涂装设备经销商、部分用户代表、《材料保护》和《现代涂料与涂装》杂志等媒体单位。座谈会由联合盛朝公司总经理程炯主持,首先由德国科隆公司营销总监H olger Seyler介绍新产品——无线测厚探讨,并进行了…     

德国EPK测厚仪的特性

上期我们已经把引进德国EPK公司测厚仪的目的,与推广使用的意义,向大家作了介绍。这期向大家介绍几种测厚仪的特性。一、笔杆式测厚仪 1.适用于钢铁基体上的各种漆、搪瓷、塑料、橡胶、阳极化处理及有色金属涂、镀层(镍层除外)。     

ZD-B智能电解测厚仪计算机测控系统

ZD-B智能电解测厚仪和计算机测控系统,检测三元合金镀层,有助于对电镀产品质量分析,提高产品质量。该系统与轮廓仪相比较其测量镀层厚度误差小、精度高,而且使用简便,稳定可靠,充分发挥了库仑测厚仪技术的优势,最大限度的获取镀层全面信息。为三元合金电镀层的厚度测量提供了新方法。     

乙苯,苯乙烯的生产及合成乙苯,苯乙烯催化剂的研究进展

苯乙烯是重要的石油化工原料。本文介绍了国内外苯乙烯生产的发展概况，合成乙苯，苯乙烯所用的催化剂种类，并就苯乙烯生产及催化剂的发展趋势提出了自己的观点。     

生物质气化及生物质与煤共气化技术的研发与应用

总结了生物质原料的特点及生物质单独气化的缺点;介绍了国内外生物质气化技术及生物质与煤共气化技术的研发与应用现状;分析了在此领域国内外的发展趋势与前景;概括了开展生物质与煤共气化技术研发的意义。     

责任和责任心的涵义与结构

责任是人应主动承担的角色义务和对其因过失所造成后果应承担的责罚.有两层涵义:一是义务;二是后果.责任心是个体自觉做好分内事务和履行道德义务的心理倾向,是个性心理品质成分中自我特征维度上的重要内容.责任心具有两个方面的涵义:一是角色分内职责;二是角色道德义务.责任心是一种通过责任认知、责任个性和责任适应的动态形式表现出来的静态品质,责任心是责任心过程结构与责任心关系结构相互制约、相互影响的统一体.     

Synthesis and characterization of homopolymers and copolymers of various acrylates and acrylonitrile

Various homopolymers and copolymers of methyl acrylate, ethyl acrylate, butyl acrylate, and acrylonitrile in different feed ratios were synthesized. These were characterized by IR, ¹³C-NMR, DSC, DTA, and TGA. Spectroscopic characterization helped in differentiating copolymers of different mol ratios. Thermal analysis revealed different degradation patterns for homopolymers and copolymers. The temperature and energy changes associated with various phase transitions were dependent on the chemical composition of homo- and copolymers, as expected. © 1993 John Wiley & Sons, Inc.     

医药和农药纳米剂型研究和应用

系统介绍了医药和农药纳米剂型研究进展和应用前景。医药微乳剂和纳米悬浮剂可显著改善药物的悬浮性和分散性,提高生物利用度。载药纳米微粒具有缓释功能,延长药物在体内的半衰期,并可实现药物的靶向定位给药。农药微乳剂具有增溶和渗透作用,提高农药的传递效率和使用安全性。农药纳米悬浮剂和载药纳米粒均可显著提高药效。纳米技术为医药和农药剂型的研究提供了新机遇,具有广阔的应用前景。     

Wetting properties of homopolymers and copolymers of pentafluorostyrene and methylacrylate and homopolymer blends

Polypentafluorostyrene (PPFS), polymethylacrylate (PMA), and poly(pentafluorostyrene-co-methylacrylate), poly(PFS-co-MA) were prepared and the wetting characteristics of polymer blends of PPFS and PMA were compared with that of poly(PFS-co-MA) via contact angle measurements. The critical surface tension of polypentafluorostyrene was found to be 22.6 dyne/cm, which is comparable to the value reported for polytrifluoroethylene (22 dyne/cm). The critical surface tension of poly(PFS-co-MA) is not linearly related to its composition. The polymer blends of PPFS and PMA exhibit significant surface enrichment of the fluoropolymer. The harmonic-mean method¹ was employed to determine surface tensions of these polymers and many known polymers. It is found that the method produces useful surface tension data provided the contact angle values are derived from testing liquids of dissimilar polarity.     

Comparison of the Adhesion and Cohesion of Triblock and Random Copolymers of Styrene and Butadiene

A substantially greater detachment energy is required to strip a polyethylene tereph-thalate (Mylar) film from a styrene-butadiene-styrene (SBS) triblock copolymer compared to that for peeling from a random styrene-butadiene (SBR) copolymer. This is true even though the intrinsic interaction between the Mylar and each elastomer is expected to be similar because of their virtually identical chemical composition. It is proposed that this difference in peel strength (between the SBS and SBR) is a consequence of the much higher dissipative capacity of the former elastomer. Another manifestation of this is the higher cohesive tear strength of the SBS compared to the SBR. Extents of energy dissipation within each elastomer during detachment of the Mylar adherend are consistent with the hypothesis that the average maximum stress experience before detachment is some similar fraction of each elastomer's tensile strength.     

Electronic structures and reactivities of monometallic and bimetallic clusters of Au and Cu

The variation of the Au 4f binding energy of Au clusters with the cluster size has been established by measuring the binding energies of clusters whose size distributions were independently determined by HREM and STM. The binding energy increases significantly when the cluster size is less than 2 nm. Au-Cu bimetallic clusters of the composition Cu₃Au have been deposited for the first time on carbon substrates. The shifts in the core level binding energies of the bimetallic clusters show the effect of alloying in the case of large clusters, but show effects of both alloying and cluster size in the case of the small clusters. The interaction of CO with Cu₃Au clusters is stronger than with a bulk Cu metal. The interaction of CO with small Cu clusters also seems to be stronger than with bulk Cu or with large Cu clusters.     

塑料制品的安全和环保要求与抗氧剂的选择和应用

介绍了国内外关于塑料制品安全性和环保性的法律、法规等要求,对国内塑料抗氧剂生产、应用中存在的相关问题进行了分析和探讨。指出国内塑料制品的安全性和环保性不仅仅与生产技术和市场有关,还与公众的安全和环保意识有关。     

Modelling and simulation of batch and semi-batch emulsion copolymerization of styrene and butyl acrylate

This work deals with modelling of emulsion polymerization processes using batch and semi-batch reactors. Specific attention is paid to copolymerization of the system styrene/butyl acrylate.The main key parameters of the model are identified on the basis of batch experimental data in order to describe the complete sketch of emulsion polymerization. The model is then used to simulate, under several operating conditions, the polymerization rate, the global monomers conversion, the number and weight average molecular weights as well as the particle size distribution and the glass transition temperature. Then, the model is generalized to the use of semi-batch processes and validated for this application.