ASTM D3314-2002(2012) Standard Test Method for RubberChemical Analysis for Polystyrene Blocks In SBR (Styrene-Butadiene Rubber) and Styrene-Reinforced Latices 《橡胶的标准试验方法 丁苯橡胶(SBR)及.pdf
《ASTM D3314-2002(2012) Standard Test Method for RubberChemical Analysis for Polystyrene Blocks In SBR (Styrene-Butadiene Rubber) and Styrene-Reinforced Latices 《橡胶的标准试验方法 丁苯橡胶(SBR)及.pdf》由会员分享,可在线阅读,更多相关《ASTM D3314-2002(2012) Standard Test Method for RubberChemical Analysis for Polystyrene Blocks In SBR (Styrene-Butadiene Rubber) and Styrene-Reinforced Latices 《橡胶的标准试验方法 丁苯橡胶(SBR)及.pdf(4页珍藏版)》请在麦多课文档分享上搜索。
1、Designation: D3314 02 (Reapproved 2012)Standard Test Method forRubberChemical Analysis for Polystyrene Blocks In SBR(Styrene-Butadiene Rubber) and Styrene-ReinforcedLatices1This standard is issued under the fixed designation D3314; the number immediately following the designation indicates the year
2、oforiginal adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers the determination of longpolystyr
3、ene blocks in SBR rubbers and styrene-reinforcedlatices.1.2 Percent block styrene content may be determined in therange from 1 to 100 %.1.3 This test method is intended for use on gel-free poly-mers, but it may be used on polymers containing gel, if it hasbeen proven that gel does not interfere.1.4
4、This standard does not purport to address all of thesafety concerns, if any, associated with its 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. For specific hazar
5、dstatements, see Section 7.2. Referenced Documents2.1 ASTM Standards:2D1076 Specification for RubberConcentrated, AmmoniaPreserved, Creamed, and Centrifuged Natural LatexD1416 Test Methods for Rubber from Synthetic SourcesChemical Analysis3D4483 Practice for Evaluating Precision for Test MethodStand
6、ards in the Rubber and Carbon Black ManufacturingIndustriesE145 Specification for Gravity-Convection and Forced-Ventilation Ovens3. Summary of Test Method3.1 The test method is based upon oxidative cleavage of theethylenic bonds in the block copolymer by treating a 1,2-dichlorobenzene solution of th
7、e polymer with tertiary butylhydroperoxide (2-methyl-2-hydroperoxypropane) with os-mium tetroxide catalyst. The saturated portions of the polymer,which contain no ethylenic bonds, remain unattacked. Thesmall fragments (low molecular weight aldehydes) and thelow-molecular weight polystyrene fragments
8、 from scissionswithin the random copolymer block are soluble in methylalcohol, whereas the detached high-molecular weight polysty-rene from the styrene homopolymer block is insoluble inalcohol. It is therefore possible to separate the high-molecularweight polystyrene, which constitutes the homopolym
9、er block,from the polymer solution.4. Significance and Use4.1 This test method is suitable for manufacturing control,development, and research studies.5. Apparatus5.1 Erlenmeyer Flask, or round-bottom flask for use withthe heating mantle, of 250-cm3capacity with ground-glassjoint. An iodine flask is
10、 also satisfactory.5.2 Air Condenser, for 5.1.5.3 Beaker, 600-cm3.5.4 Graduated Cylinder, 50-cm3.5.5 Pipet, 1-cm3.5.6 Buret, 100-cm3, for dispensing tertiary butyl hydroper-oxide.5.7 Thermometer, to 150C range.5.8 Crucible, Gooch-type, fritted-glass, medium-porosity,25 to 50-cm3size.5.9 Hot Plate, c
11、apable of operating to provide 120 to 130Cto boiling solution, or heating mantle for round-bottom flasksoperating in the same temperature range.5.10 Drying Oven, capable of controlling at 100C Type 1Boven in accordance with Specification E145.1This test method is under the jurisdiction of ASTM Commi
12、ttee D11 on Rubberand is the direct responsibility of Subcommittee D11.11 on Chemical Analysis.Current edition approved May 1, 2012. Published May 2012. Originallyapproved in 1974. Last previous edition approved in 2006 as D3314 02 (2006).DOI: 10.1520/D3314-02R12.2For referenced ASTM standards, visi
13、t the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3Withdrawn. The last approved version of this historical standard is referencedon www.astm.org.1C
14、opyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.6. Reagents6.1 Purity of ReagentsReagent grade chemicals shall beused in all tests. Unless otherwise indicated, it is intended thatall reagents shall conform to the specifications of the
15、Commit-tee on Analytical Reagents of the American Chemical Society,where such specifications are available.4Other grades may beused, provided it is first ascertained that the reagent is ofsufficiently high purity to permit its use without lessening theaccuracy of the determination.6.2 1,2-Dichlorobe
16、nzene.6.3 Methanol.6.4 Osmium Tetroxide (0.004 M Solution in Toluene 1 kg/m3(0.1 g/100 cm3)Protect the solution from light. Decompo-sition is indicated by formation of a black precipitate. Thevapors are highly toxic. Therefore, use due precaution inreagent preparation, use, and disposal. One cubic c
17、entimetre ofthis stock solution is needed for each analysis. In view of thetoxicity of the reagent, the amount of solution prepared shouldnot greatly exceed the number of determinations to be madeover a reasonable period of time, depending on the stability ofthe solution and the work load.6.5 Sulfur
18、ic Acid (density 1.84 Mg/m3)(H2SO4).6.6 Tertiary Butyl Hydroperoxide (2-Methyl-2-Hydroperoxypropane), approximately 70 % purity assay istypical.6.7 Toluene.7. Use of Osmium Tetroxide7.1 Precautions:7.1.1 Store osmium tetroxide ampules (maximum total of3 g) inside capped pipe or its equivalent.7.1.2
19、Persons working with osmium tetroxide or its solu-tions should wear rubber gloves, a rubber apron, and a faceshield or goggles.7.1.3 Keep solutions of osmium tetroxide (maximum of0.5 g) in unbreakable containers and store and use in the hood.The volume of air mechanically exhausted should be such th
20、atthe hood-face velocities are within acceptable limits (a recom-mended minimum of (0.5 m/s) 100 ft/min).7.1.4 Mark all containers of osmium tetroxide, whetherconcentrated or diluted with “DANGER” labels.7.1.5 Transfer all osmium tetroxide or its solutions to bedisposed of, to polyethylene bottles a
21、nd incinerate. Filtrates arecollected in a dump-can set aside for chlorinated solvents, andthe contents are also incinerated. Do not accumulate wastesolutions.7.2 Hazards:7.2.1 Osmium tetroxide is a yellow crystalline mass at roomtemperature. It can be hazardous in either its crystalline orvapor for
22、m. On contact with the skin or eyes, it producesirritation and if not removed immediately, may cause derma-titis and ulceration of the skin and intense conjunctivitis andcorneal ulceration to the eye. Inhalation of osmium tetroxidemay cause capillary bronchitis and dermatitis. Even smallamounts, if
23、inhaled over a considerable period, cause head-ache, insomnia, pharyngeal and laryngeal distress, and diges-tive disturbance. (WarningAnalysts must thoroughly famil-iarize themselves with a current Material safety data Sheet(MSDS) for osmium tetroxide.)7.2.2 The vapor has a pronounced acrid, chlorin
24、e-like odor,which should be taken as a warning of the toxic concentrationin the atmosphere, and personnel should immediately removeto an area of fresh air. The minimum perceptible concentrationis 0.02 g/m3of air. The threshold safety limit is 0.002 mg/m3of air. Therefore, it cannot be detected by od
- 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:
- ASTMD331420022012STANDARDTESTMETHODFORRUBBERCHEMICALANALYSISFORPOLYSTYRENEBLOCKSINSBRSTYRENEBUTADIENERUBBERANDSTYRENEREINFORCEDLATICES

链接地址:http://www.mydoc123.com/p-514549.html