PPA在LLDPE/LDPE薄膜加工中的应用

本工作以ＬＬＤＰＥ／ＬＤＰＥ共混树脂为基料，添加氟弹性体ＰＰＡ加工改性剂，采用挤出吹塑成型加工薄膜制品．ＬＬＤＰＥ／ＬＤＰＥ＝１／２为空白．添加５００ＰＰＭ的ＰＰＡ后，共混物中ＬＬＤＰＥ为１／３时，挤出机电流下降，薄膜的透光率增加，雾度降低；ＬＬＤＰＥ含量为６０％时，挤出机电流未变而产量提高，薄膜的透光率和雾度变化不大；继续增加ＬＬＤＰＥ比例时，挤出机电流和薄膜雾度增加．薄膜的拉伸性质随ＬＬＤＰＥ比例增大而显著提高，且纵横向的取向性变小．     

PP/HDPE/EPDM共混物的研究

研究了聚丙烯（ＰＰ）、高密度聚乙烯（ＨＤＰＥ）和ＥＰＤＭ共混制备非交联型ＰＰ／ＨＤＰＥ／ＥＰＤＭ三元共混物。结果表明，当共混比ＰＰ／ＨＤＰＥ／ＥＰＤＭ＝６５／２０／１５，活性碳酸钙为３０份，ＨＤＰＥ品种为ＧＦ７７５０，采用先把ＨＤＰＥ和ＥＰＤＭ预制成混料再与ＰＰ共混的方法，可得到性能良好的ＰＰ／ＨＤＰＥ／ＥＰＤＭ共混物。     

国产与进口EPDM在IR内胎中的应用对比

对吉林化学工业公司生产的ＥＰＤＭ和日本ＪＳＲ公司生产的ＥＰＤＭ在ＩＲ内胎中的应用情况进行对比研究，结果表明，国产ＥＰＤＭ与进口ＥＰＤＭ的门尼焦烧时间和硫化胶的物理性能基本相同。用ＩＲ／ＥＰＤＭ并用胶制造汽车内胎时，国产ＥＰＤＭ可完全替代进口ＥＰＤＭ，内胎的各项性能指标均达到国家标准。     

吉化EPDM在汽车散热胶管中的应用

汽车散热胶管主要采用ＥＰＤＭ制造。吉林化学工业公司生产的ＥＰＤＭ质量稳定 ,价格低廉。本工作考察了吉化产ＥＰＤＭ在散热胶管中的应用情况。1　拟考察的ＥＰＤＭ品种本工作拟考察的ＥＰＤＭ为Ｊ 30 80 ,Ｊ 30 62Ｅ和Ｊ 30 92Ｅ ,它们的具体技术指标如表 1所示。Ｊ 30 80和     

LLDPE泡管膜机头设计中应考虑的问题

ＰＥ泡管膜机头设计中，ＨＤＰＥ、ＭＤＰＥ、ＬＤＰＥ、ＬＬＤＰＥ及其按一定的比例混料挤出吹膜时，机头设计是有所区别的，特别是以ＬＬＤＰＥ及混料挤出泡管膜的机头设计，应给予特殊考虑。     

EPDM/聚烯烃共混型热塑性弹性体的研究

制备ＥＰＤＭ／聚烯烃简单共混型热塑性弹性体。研究了聚合物种类、橡塑比、二元和三元共混对共混物力学性能的影响。结果表明，部分结晶性ＥＰＤＭ共混物的力学性能比无定形ＥＰＤＭ共混物好，部分结晶性ＥＰＤＭ与ＬＤＰＥ（低密度聚乙烯）共混物的拉伸强度大于两者的加和值，而其它二元共混物的拉伸强度均低于两共混单元的加和值；用ＬＤＰＥ部分替代ＰＰ，或用氯磺化聚乙烯（ＣＳＭ）部分替代结晶性ＥＰＤＭ进行三元共混，能改善部分结晶性ＥＰＤＭ／ＰＰ共混物的某些性能。     

比邻理论标准化定积分定义的扩充

比邻理论标准化定积分定义的扩充ＯＮＥＸＴＥＮＤＥＤＤＥＦＩＮＴＩＯＮＯＦＳＴＡＮＤＡＲＤＩＺＥＤＤＥＦＩＮＩＴＥＩＮＴＥＧＲＡＬＩＮＮＥＩＧＨＢＯＢＲＨＯＯＤＴＨＥＯＲＹ孙宏林，田玫１引言测定生物大分子的晶体结构进而合成模拟化合物，以解决医学及生命科...     

LLDPE DFDA—7047L耐候专用料的加工性研究

论述ＬＬＤＰＥ ＤＦＤＡ－７０４７Ｌ耐候专用料性能。与ＬＤＰＥ和ＬＬＤＰＥ相比。用该料生产的地膜，具有优良的力学性能及减薄性能，有较宽的加工范围，是吹制地膜及棚膜的优秀原料。     

改进型中乙烯基聚丁二烯橡胶的研制 Ⅳ.丁二烯聚合动力学

对ｎ－ＢｕＬｉ／ＧＤＥＥ（醚类微观结构调节剂）／环己烷体系丁二烯聚合动力学进行了研究。发现ＧＤＥＥ的加入提高了聚合速率，随ＧＤＥＥ／Ｌｉ（摩尔比）增大和反应温度的升高，反应速率加快；单体浓度与聚合速率呈一次方关系；在５０℃，ＧＤＥＥ／Ｌｉ为１．４时，引发剂浓度与聚合速率呈一次方关系。当ＧＤＥＥ／Ｌｉ为１．４时，聚丁二烯基锂几乎完全解缔为单量体。     

改进型中乙烯基聚丁二烯橡胶的研制：IV.丁二烯聚合动力学

对ｎ－ＢｕＬｉ／ＧＤＥＥ（醚基微观结构调节剂）／环己烷体系丁二烯聚合动力学进行了研究。发现ＧＤＥＥ的加入提高了聚合速率，随ＧＤＥＥ／Ｌｉ（摩尔比）增大和反应测试的升高，反应速率加快；单体浓度与聚合速率呈一次方关系；在５０℃，ＧＤＥＥ／Ｌｉ为１．４时，引发剂浓度与聚合速率呈一次方关系，当ＧＤＥＥ／Ｌｉ１．４时，聚丁二烯基锂几乎完全解缔为单量体。     

如何编写符合欧盟规定的安全技术说明书

安全技术说明书(SDS)是一份关于化学品燃爆、毒性和环境危害以及安全使用、泄露应急处置、主要理化参数、法律法规等方面信息的综合性文件。介绍了如何编写符合欧盟规定的SDS,包括编写SDS所依据的法规及指令和SDS的内容、格式及编写要求。     

CHROME REFRACTORIES1

A compilation from the available literature is presented, giving the more important data on chromite and chrome refractories. A bibliography is included.     

焦炭热失重自动测定仪的开发

介绍了焦炭连续热失重自动测定装置的开发及软件的编写过程,重点介绍了质量及温度两大信号的采集方法,并借助于VBA知识和EXCEL2000数据处理功能对采集的数据进行了后续处理。     

Thermodynamic Data on Oxides at Elevated Temperatures

An extensive compilation of data on the free energy of formation of oxides is presented in graphic form. From these curves it is possible to obtain the free energy of most ceramic oxides in the temperature range 0° to 2400° C.     

电导率仪与PC-1500联机测定液相停留时间分布

利用PC-1500袖珍计算机,构成一套在线数据采集与处理系统。该系统用于测定模拟反应器的液相停留时间分布,有测量精度高、安装调试容易、成本低和便于推广应用等优点。     

基于UG注塑模具标准件三维参数化图形库的开发

分析了开发注塑模具标准件三维参数化图形库的必要性,提出了基于UG平台采用VC编译建立新国标注塑模具标准件图形库的思路:通过调用数据库中的参数数据或直接由用户界面输入,应用参数化设计技术在UG中生成标准件实体模型。     

CHROME REFRACTORIES FOR THE OPEN HEARTH2

This is not a technical paper but a compilation of notes on chrome ore, and the various forms in which it is used in open hearth furnaces, with a discussion of recent improvements in chrome brick that have permitted their broader use. Also some performance data secured through the courtesy of many companies and individuals operating open hearth furnaces.     

SPECTRORADIOMETRY AND COLORIMETRY IN THE LIGHTING INDUSTRY

Spectroradiometry is fundamental in the measurement and evaluation of color. It is used in the evaluation of new light sources, in the analysis of problem areas, and for the compilation of data for inclusion in the technical brochures describing lighting products. The basic elements of a spectroradiometer are described and the application of spectral-power distribution measurements to photometry and colorimetry is illustrated.     

Brazilian Food Composition Table TBCA-USP (Versions 3 and 4) in the international context

The Brazilian Food Composition Table (TBCA-USP) aims to divulge information about Brazilian food composition. Therefore, it adopts international patterns that define rules and criteria for the food composition area, through guides and manuals with protocols to be used for data generation and compilation, which amplifies the communication and exchange between laboratories. From 2001 to 2004, 863 new data were introduced in the TBCA-USP, in a total of 1838 data, 1200 of which refers to proximal composition. During this period, the versions 3.0, 4.0 and 4.1 of the TBCA-USP were developed and put on the Internet. These versions had several structural modifications in relation to the ones before. The version 3.0 of the TBCA-USP used to be separated by groups of foods, due to its large number of information. Once this number kept growing, the versions 4.0/4.1 turned to have their food data showed individually, accessed through the name of the food (in Portuguese, English or scientific name). All data is presented as 100 g/food and domestic measurement. There is a form available for compilation of food composition data, in order to stimulate researchers to send and publish data that may be evaluated correctly. The TBCA-USP is being structured similarly to the other international tables that follow patterns of INFOODS (International Network of Food Data Systems); and it is making an effort to create specific databases of nutrients or foods that have functional properties.     

浅谈国内外温室气体清单编制方法学与现状

随着人类对温室气体与气候变暖之间关系认识的不断深化,温室气体排放清单编制已经成为温室气体研究以及各国建立相应减排机制的一项重要基础工作。本文介绍了温室气体清单编制的国际背景及由来,概述了国内外温室气体清单编制的方法学和我国温室气体清单编制的进展情况,总结了当前我国清单编制中存在的问题与不足。最后阐明了温室气体清单编制的意义,提出建立温室气体清单的建议,以期扩大温室气体的研究范围,丰富温室气体清单研究方法的选择,促进我国温室气体清单方法学体系的完善,进而为未来碳排放情景预测提供依据,推动碳减排潜力分析研究的开展。