ASTM D2024-1965(2003) Standard Test Method for Cloud Point of Nonionic Surfactants《非离子表面活性剂始凝点的标准试验方法》.pdf
《ASTM D2024-1965(2003) Standard Test Method for Cloud Point of Nonionic Surfactants《非离子表面活性剂始凝点的标准试验方法》.pdf》由会员分享,可在线阅读,更多相关《ASTM D2024-1965(2003) Standard Test Method for Cloud Point of Nonionic Surfactants《非离子表面活性剂始凝点的标准试验方法》.pdf(2页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D 2024 65 (Reapproved 2003)Standard Test Method forCloud Point of Nonionic Surfactants1This standard is issued under the fixed designation D 2024; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revisi
2、on. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers the determination of the solu-bility inversion temperature or “cloud point” of nonionicsurfactants or de
3、tergent systems which are characteristicallyless soluble in water at higher temperatures than at lowertemperatures. It is limited to those surfactants and detergentsystems for which the visible solubility change occurs over arange of 1C or less at concentrations of 0.5 to 1.0 % in waterbetween 30 an
4、d 95C.1.2 Chemical LimitationsNonionic surfactants that ex-hibit a characteristic cloud point in general terms consist of awater-in-soluble moiety condensed with 50 to 75 % by weightof ethylene oxide.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its
5、 use. It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2. Referenced Documents2.1 ASTM Standards:2E 1 Specification for ASTM Thermometers3. Significance and Use3.1 The cl
6、oud point temperature is a reproducible charac-teristic of certain pure nonionic surfactants. It is also charac-teristic of certain nonionic surfactant formulated systems. Thistest method is appropriate for both systems.NOTE 1If the transition from a distinctly cloudy to a clear solution isnot sharp
7、, that is, if it does not take place within a range of 1C, this testmethod is not appropriate.4. Interferences4.1 Ionic surfactants or detergents in concentrations down to1 % or less of the nonionic surfactant drastically raise thecharacteristic cloud point of the latter. The presence of salts andba
8、ses (that is, non-surface active materials) will lower thecharacteristic cloud point. Acids tend to raise the cloud point.5. Apparatus5.1 ThermometerAn ASTM Partial Immersion Thermom-eter having a range from 20 to +150C or 0 to 302F andconforming to the requirements for Thermometer 1C or 1F inaccord
9、ance with Specification E 1.6. Procedure6.1 Prepare a 1.0 % test solution by weighing a 1 6 0.1-gsample into a 150-mL beaker and add 100 mL of distilled ordemineralized water which is at a temperature of less than30C. Agitate until the sample is dissolved. Pour 50 6 5mLoftest solution into a 25 by 2
- 1.请仔细阅读文档,确保文档完整性,对于不预览、不比对内容而直接下载带来的问题本站不予受理。
- 2.下载的文档,不会出现我们的网址水印。
- 3、该文档所得收入(下载+内容+预览)归上传者、原创作者;如果您是本文档原作者,请点此认领!既往收益都归您。
下载文档到电脑,查找使用更方便
10000 积分 0人已下载
下载 | 加入VIP,交流精品资源 |
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- ASTMD202419652003STANDARDTESTMETHODFORCLOUDPOINTOFNONIONICSURFACTANTS 离子 表面活性剂 始凝点 标准 试验 方法 PDF

链接地址:http://www.mydoc123.com/p-510857.html