1—氧代—4—羟甲基—2,6,7—三氧基—1—磷杂双环[2,2,2]辛烷溴代衍生物的合成及

由季戊四醇和ＰＯＣＬ３的磷酰化反应合成１－氧代－４－羟甲基－２,６,７－三氧基－１－磷杂双环「２,２,２」辛烷（ＰＥＰＡ）,以ＰＥＰＡ和／或２,４,６－三溴苯酚与ＰＯＣｌ３反应合成了（２,４,６－三溴苯基）双（１－氧代－４－甲撑－２,６,７－三氧基－１－磷杂双环「２,２,２」辛烷基）双（２,４,６－三溴苯基）磷酸酯（ＰＤＴＰ）和三（２,４,６－三溴苯基）磷酸酯（ＴＴＢＰ）。应用研究表明,含有季戊四醇笼状磷酸酯基团的ＴＤＰＰ和ＰＤＴＰ具有比诸如ＴＴＢＰ的溴代磷酸酯更好的阻燃效果。     

聚丙烯网络合成

用固相两步法合成了聚丙烯（ＰＰ）网络。首先将ＰＰ用马来酸酐（ＭＡＨ）功能化，再加入交联剂己二胺（ＨＤＡ）或聚乙烯醇（ＰＶＡ）使ＰＰ网络化。研究了在该方法中反应条件与ＰＰ网络的凝胶含量关系。结果表明，当引发剂过氧化苯甲酰（ＢＰＯ）用量低于０．８３×１０－３ｍｏｌ时，凝胶含量随ＢＰＯ增加而迅速升高，ＢＰＯ用量高于１．６５×１０－３ｍｏｌ时，凝胶含量基本不再变化，控制反应的最佳时间为２５～３０ｍｉｎ。     

非完全共轭MeO-PPV的合成和光致发光光谱

采用Ｐ．Ｌ．Ｂｕｒｎ的路线,从二甲硫醚锍盐前聚体出发合成了α位甲氧基取代的ＰＰＶ（ＭｅＯ－ＰＰＶ）,ＩＲ显示ＭｅＯ－ＰＰＶ前聚体中有Ｃ－Ｓ键残留,在较高温度下热转化仍有Ｃ－Ｏ－Ｃ键残留。通过控制热转化温度,ＭｅＯ－ＰＰＶ的发光波长可在４５０￣５５０ｎｍ之间进行调节。     

1,4-双(氯甲基)-2-甲氧基-5-辛氧基苯及聚合物的合成

由对甲氧基苯酚（ＭＯＰｈ）合成出一种可溶性电致发光共轭聚合物聚（２－甲氧基－５－辛氧基）亚苯基亚乙烯（ＰＭＯＯＯＰＶ）大致过程为：由ＭＯＰｈ与１－溴辛烷合成１－甲氧基－４－辛氧基苯（ＭＯＯＯＢ）继而合成了１,４－双（氯甲基）－２－甲氧基－５－辛氧基苯（ＢＣＭＭＯＯＯＢ）碱性聚合得可溶性ＰＭＯＯＯＰＶ。并做了ＢＣＭＭＯＯＯＢ与其它单体的共聚,对中间体及聚合物用＾１ＨＮＭＲ进行了表征。     

液晶杂环高聚物的合成

首次较详细地论述了聚苯撑苯并二噻唑或二咪唑（ＰＢＴ或ＰＢＯ或ＰＢＩ）、聚苯并噻唑或恶唑（ＡＢＰＰＢＴ或ＡＢＰＢＯ）、聚苯并二咪唑苯并菲绕啉二酮（ＰＱ）及其衍生物的合成方法和相应的特性粘数。     

聚苯醚与含有机硅嵌段共聚物共混的研究

利用差热扫描量热计（ＤＳＣ）、动态粘弹谱仪（ＤＤＶ）和力学性能测试等手段研究了ＰＰＯ／ＰＨＳ－ＰＤＭＳ、ＰＰＯ／ＰＰＯ－ＰＨＳ－ＰＤＭＳ和ＰＰＯ／ＰＳ／ＰＰＯ－ＰＨＳ－ＰＤＭＳ３个共混体系的形态结构和性能。结果表明，ＰＰＯ／ＰＨＳ－ＰＤＭＳ为一相容体系。当ＰＰＯ分子量与ＰＰＯ－ＰＨＳ－ＰＤＭＳ中ＰＰＯ分子量相同时，ＰＰＯ／ＰＰＯ－ＰＨＳ－ＰＤＭＳ与ＰＰＯ／ＰＳ／ＰＰＯ－ＰＨＳ－ＰＤＭＳ是两个相容体     

HPVC/PP共混改性研究Ⅳ共混物的流变特性

研究了ＨＰＶＣ／ＰＰ共混物的流变性能，结果表明，ＣＰＥ、ＡＢＳ对ＨＰＶＣ／ＰＰ有增粘作用。随着ＣＰＥ用量增加，共混物熔体粘度（ηａ）增加。ＣＰＥ或ＡＢＳ先与ＨＰＶＣ共混后再与ＰＰ共混的共混物的ηａ高于ＣＰＥ或ＡＢＳ先与ＰＰ共混后再与ＨＰＶＣ共混的共混物的ηａ。ＨＰＶＣ／ＰＰ、ＨＰＶＣ／ＰＰ／ＭＡＨ２．５、ＨＰＶＣ／ＰＰ／ＣＰＥ１０、ＨＰＶＣ／ＰＰ／ＡＢＳ１０共混物的ηａ～组成（Ｃ）的关系均属于正－负偏离共混物（Ｐ－ＮＤＢ）体系，即在特定共混比下发生相转变。     

大型电容薄膜卷绕真空镀膜机的研制

本文通过对大型电容薄膜卷绕真空镀膜机（ＣＲＣ－６５０／ＭＰ）的研制介绍，着重叙述该机结构特点，蒸发系统的设计，说明该设备可广泛运用于ＯＰＰ、ＰＥＴ、ＰＣ、ＢＯＰＰ等带材上蒸镀电容膜，是国内目前具有先进性能的电容器用多功能卷绕真空镀膜机。     

YH501S在PET／VMCPP复合膜上的应用

一、前言 镀铝复合膜是将镀铝薄膜（一般为ＶＭＰＥＴ、ＶＭＢＯＰＰ、ＶＭＣＰＰ或ＶＭＣＰＥ）与透明塑料薄膜复合而形成的一种带有“铝光泽”的,具有较好的阻隔性的软包装材料,已广泛应用于食品、保健品、医药、化妆品的外包装,尤其在干燥、膨化食品上,因其方便、美观、价廉和较好的阻隔性能而获得了更广泛的应用。但在我们在调查中发展,市场上的镀铝复合膜普遍存在剥离强度较低的问题,尤其是ＰＥＴ／ＶＭＣＰＰ结构的复合膜产品,有的厂家其剥离强度甚至仅有０．１～０．２Ｎ／１５ｍｍ。因为 ＰＥＴ／ ＶＭＣＰＰ复合膜的用量占…     

PET／VMCPP复合膜剥离强度影响因素的探论

一、前言镀铝复合膜是将镀铝薄膜（一般为ＶＭＰＥＴ、ＶＭＢＯＰＰ、ＶＭＣＰＰ或ＶＭＣＰＥ）与透明塑料薄膜复合在一起而形成的一种带有“铝光泽”的具有较好的阻隔性的软包装材料,已广泛应用于食品、保健品、医药、化妆品的外包装,尤其在干燥、膨化食品上,因其方便、美观、价廉和较好的阻隔性能而获得了更广泛的应用。但在我们的调查中发展,市场上的镀铝复合膜普遍存在剥离强度较低的问题,尤其是ＰＥＴ／ＶＭＣＰＰ结构的复合膜产品,有的厂家其剥离强度甚至仅有０．１－０．２Ｎ／１５ｍｍ。因为ＰＥＴ／ＶＭＣＰＰ复合膜的用量占…     

Insertion of triangulated surfaces into a meccano tetrahedral discretization by means of mesh refinement and optimization procedures

In this paper, we present a new method for inserting several triangulated surfaces into an existing tetrahedral mesh generated by the meccano method. The result is a conformal mesh where each inserted surface is approximated by a set of faces of the final tetrahedral mesh. First, the tetrahedral mesh is refined around the inserted surfaces to capture their geometric features. Second, each immersed surface is approximated by a set of faces from the tetrahedral mesh. Third, following a novel approach, the nodes of the approximated surfaces are mapped to the corresponding immersed surface. Fourth, we untangle and smooth the mesh by optimizing a regularized shape distortion measure for tetrahedral elements in which we move all the nodes of the mesh, restricting the movement of the edge and surface nodes along the corresponding entity they belong to. The refining process allows approximating the immersed surface for any initial meccano tetrahedral mesh. Moreover, the proposed projection method avoids computational expensive geometric projections. Finally, the applied simultaneous untangling and smoothing process delivers a high‐quality mesh and ensures that the immersed surfaces are interpolated. Several examples are presented to assess the properties of the proposed method.     

Certification Institutions Expected to Update and Transfer Information on Present Standards

Standards are the basis for production enterprises to organize production, ex-factory inspection, trade (delivery) and technical exchanges, product certification, quality arbitration and supervision.……     

Flow calorimeter for enthalpy increment measurements on condensed gases

A flow calorimeter for enthalpy increment measurements on condensed gases is presented. A better knowledge of the properties of the liquefied natural gas is needed, and therefore a liquid loop has been designed for our flow calorimeter. The fluid loop in the calorimeter is designed in order to avoid the two-phase region, since two phases would give compositional disturbances in the measurements. The avoidance of the two-phase region is made possible by increasing the pressure of the test fluid after the measurement section, then heating the fluid at super-critical pressure past the critical point. Finally, the fluid is throttled to the low-pressure gas state at the inlet condition of the compressor that circulates the fluid. To perform the pressure increase, a new cryogenic pump has been designed. To evaluate the new equipment, measurements were taken on liquid ethane over the temperature range 146–256 K at pressure between 0.9 and 5.1 MPa.     

Refrigerators Enter a New Era of Health Preservation Frestech initiates the establishment of China's first standard for household sterilization refrigerators

On November 30, 2007, the China Association for Standardization (CAS) held a press conference at Beijing Diaoyutai State Guest House. Leaders from the China Household Electric Appliance Research Institute, the China Household Electric Appliance Association, and the China Consumers' Association attended and made speeches.……     

Optimum-Simulation von Ernteprozessen

Zusammenfassung Bei der Gestaltung von Ernteprozessen — beispielsweise des Prozesses Mähdrusch, Körnertransport und -abnahme — als transportverbundene Fließarbeitsverfahren mit mindestens zwei verschiedenen Arbeitsmitteln gibt es einen großen Optimierungsspielraum. Solche Prozesse sind mehrstufige Bedienungsprozesse mit gemischter Anordnung der Bedienungseinrichtungen. Außerdem besitzen sie stark ausgeprägte räumliche Aspekte. Es wird vor allem gezeigt, welche Merkmale solcher Prozesse in Simulationsmodellen abgebildet sein müssen, welche Zielgrößen in Abhängigkeit von welchen Einflußgrößen unter Berücksichtigung welcher Prozeßbedingungen ermittelt werden sollten und wie der Bewertungsprozeß zur Ermittlung der gewünschten Informationen gestaltet werden muß.     

A study of centrifugal cast high boron high speed steel

In the present study a high‐boron high speed steel (HSS) roll material was designed. Many expensive alloy elements have been substituted by cheap boron alloy, and high‐boron high speed steel roll has been manufactured by centrifugal casting method. The microstructures, mechanical properties and wear resistance of centrifugal casting high‐boron high speed steel roll have been investigated by optical microscopy (OM), scanning electron microscopy (SEM), and X‐ray diffraction (XRD) analysis, hardness test, impact test and wear test. The results indicated that the solidification microstructures of high‐boron high speed steel roll consisted of M₂(B,C), (W,Mo)₂(B,C), M₃(B,C), M₂₃(B,C)₆ type borocarbides and martensite, a small amount of retained austenite. Borocarbides were continuously distributed over the grain boundary. After quenching from 1050 °C, local broken network appeared in partial borocarbides, and fine secondary borocarbide precipitated from the matrix. After tempering from 525 °C, the amount of precipitated borocarbide increased significantly. After heat treatment, the hardness of high‐boron high speed steel roll excelled 60 HRC, and its impact toughness excelled 8.0 J/cm². The single groove steel rolling amount of high‐boron high speed steel rolls increases by 500% than that of bainite cast iron roll, when the rolls are used in K₁ mill housing of bar mill.     

Thixotropy of Systems with Shear Thinning and Plastic Flow Behavior

The definition of the thixotropy is a decrease in viscosity with time in shear and a subsequent recovery of viscosity after the shear deformation is removed.We ...     

Brainstorming for ISO Strategy 2016-2020

正Responding to ISO’s appeal for survey for the to-be-developed ISO Strategy Plan for 2016-2020,SAC hosted a special workshop over the needs and comments of various fi elds on June 8 in Beijing.The workshop was attended by ISO President-elect and Ansteel General Manager Zhang Xiaogang,SAC Vice-Administrator Yu Xinli,and 30 experts from     

CNAS Passes APLAC's PTP Review

正The review group of Asia Pacific Laboratory Accreditation Cooperation(APLAC)carried out a 4-day peer review of the proficiency testing provider(PTP)for China National Accreditation Service for Conformity Assessment(CNAS)from July 28 to 31,2014.CNAS passed the PTP review with excellent performance.Two senior peer reviewers of APLAC made a comprehensive,rigorous and detailed review of CNAS’s PTP accreditation activities,and made the on-spot inspection of the review groups in Shanghai and Shenzhen respectively.