ImageVerifierCode 换一换
格式:PDF , 页数:5 ,大小:101.51KB ,
资源ID:514627      下载积分:10000 积分
快捷下载
登录下载
邮箱/手机:
温馨提示:
如需开发票,请勿充值!快捷下载时,用户名和密码都是您填写的邮箱或者手机号,方便查询和重复下载(系统自动生成)。
如填写123,账号就是123,密码也是123。
特别说明:
请自助下载,系统不会自动发送文件的哦; 如果您已付费,想二次下载,请登录后访问:我的下载记录
支付方式: 支付宝扫码支付 微信扫码支付   
注意:如需开发票,请勿充值!
验证码:   换一换

加入VIP,免费下载
 

温馨提示:由于个人手机设置不同,如果发现不能下载,请复制以下地址【http://www.mydoc123.com/d-514627.html】到电脑端继续下载(重复下载不扣费)。

已注册用户请登录:
账号:
密码:
验证码:   换一换
  忘记密码?
三方登录: 微信登录  

下载须知

1: 本站所有资源如无特殊说明,都需要本地电脑安装OFFICE2007和PDF阅读器。
2: 试题试卷类文档,如果标题没有明确说明有答案则都视为没有答案,请知晓。
3: 文件的所有权益归上传用户所有。
4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
5. 本站仅提供交流平台,并不能对任何下载内容负责。
6. 下载文件中如有侵权或不适当内容,请与我们联系,我们立即纠正。
7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。

版权提示 | 免责声明

本文(ASTM D3349-2012 Standard Test Method for Absorption Coefficient of Ethylene Polymer Material Pigmented with Carbon Black《用炭黑着色的乙烯聚合材料吸收系数的标准试验方法》.pdf)为本站会员(inwarn120)主动上传,麦多课文库仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对上载内容本身不做任何修改或编辑。 若此文所含内容侵犯了您的版权或隐私,请立即通知麦多课文库(发送邮件至master@mydoc123.com或直接QQ联系客服),我们立即给予删除!

ASTM D3349-2012 Standard Test Method for Absorption Coefficient of Ethylene Polymer Material Pigmented with Carbon Black《用炭黑着色的乙烯聚合材料吸收系数的标准试验方法》.pdf

1、Designation:D334906 Designation: D3349 12An American National StandardStandard Test Method forAbsorption Coefficient of Ethylene Polymer MaterialPigmented with Carbon Black1This standard is issued under the fixed designation D3349; 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. Scope*1.1 This test method measures the amount of light transmitte

3、d through a film of carbon black pigmented ethylene polymer.1.2 After calculation of the amount of light and film thickness, an absorption coefficient is calculated.1.3 Whenever two sets of values are presented, in different units, the values in the first set are the standard, while those inparenthe

4、ses are for information only.1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibilityof the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatorylimitations p

5、rior to use.2. Referenced Documents2.1 ASTM Standards:2E60 Practice for Analysis of Metals, Ores, and Related Materials by SpectrophotometryD1248 Specification for Polyethylene Plastics Extrusion Materials for Wire and Cable3. Summary of Test Method3.1 The transmission of light of a specified wavele

6、ngth through thin ethylene polymer film is measured. The result is used tocalculate an absorption coefficient that is a reciprocal function of transmission after correction for thickness.4. Significance and Use4.1 The absorption coefficient of polyolefin polymer pigmented with carbon black is useful

7、 to judge the degree and uniformityof dispersion of the pigment, and the adequacy of the quantitative level of pigment addition. These factors are used to predict theperformance of the polymer material in response to prolonged exposure to ultraviolet light as evidenced by minimal changes inspecific

8、properties.NOTE 1This test method was developed to evaluate ethylene polymer materials pigmented with small particle size carbon blacks suitable for UVprotection. It is not known how accurate and reproducible the test would be with larger (35 nm or greater) particle size blacks.5. Apparatus5.1 Spect

9、rophotometerAn instrument in accordance with Practice E60 is required.NOTE 2Consult the spectrophotometers operation manual or consult the manufacturer of the instrument for the calibration procedure.5.2 MoldA mold in accordance with Figs. 1 and 2. Make the mold of Ketos steel (or equivalent) harden

10、ed to Rockwell C45,with mold surfaces chromium plated to 0.005-mm (0.0002-in.) minimum thickness.5.3 Specimen HolderCut two concentric rings from phenolic-paper laminate or other suitable material to the dimensionsshown in Fig. 3. Slip fit the rings snugly one within the other.5.4 Reference Material

11、A reference material is required having an absorbance value of 1.0 to 1.2 at 375 nm as measured bythe instrument used for testing.1This test method is under the jurisdiction of ASTM Committee D09 on Electrical and Electronic Insulating Materials and is the direct responsibility of SubcommitteeD09.18

12、 on Solid Insulations, Non-Metallic Shieldings, and Coverings for Electrical and Telecommunications Wires and Cables.Current edition approved AprilJan. 1, 2006.2012. Published April 2006.February 2012. Originally approved in 1974. Last previous edition approved in 19992006 asD334999.D3349 06. DOI: 1

13、0.1520/D3349-06.10.1520/D3349-12.2For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at serviceastm.org. For Annual Book of ASTM Standardsvolume information, refer to the standards Document Summary page on the ASTM website.1This document is not an A

14、STM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Becauseit may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In

15、all cases only the current versionof the standard as published by ASTM is to be considered the official document.*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.5.4.1 N

16、eutral Density Filter,3M-type carbon 0.85 density, laminated between cellulose acetate sheets has been foundsatisfactory. Since this material is furnished as a rigid sheet, it cannot be mounted as described in Section 7. Instead, a specialmount must be prepared by cutting Ring 1 of Fig. 3 in half ar

17、ound its circumference to give two rings about 2 mm (0.08 in.) thick.Cut a 22-mm (0.87-in.) circle from the laminated filter, sandwich this between the two 2-mm rings, and slide the outer ring (Ring2 of Fig. 3) over this composite.5.4.2 An alternative reference material can be prepared by any user o

18、f this test method. Prepare an alternative reference materialconsisting of a highly uniform sample of ASTM Type I polyethylene (see Specification D1248) containing about 1 % of a 20-nmcarbon black (either channel or furnace type). Press out a uniform film of this material and mount as in Section 8 t

19、o meet the aboverequirements. Reference materials so prepared shall show no more than 6 4 % variation from the average absorbance value whenmeasured at any point at 375 nm in the instrument used for testing.6. Calibration and Standardization6.1 Allow the spectrophotometer to stabilize. Using the spe

20、ctrophotomer manufacturers instructions, set the zero and infinityvalues on the absorbance scale.6.2 Insert the mounted reference material in the spectrophotomer and place it into the light beam. Read and record theabsorbance value using the conditions that bring the value nearest to zero on the abs

21、orbance scale. With the reference material stillin the beam, readjust the slit width to bring the reading back to zero. Recheck the infinity value.7. Conditioning7.1 No special conditioning is required.8. Specimen Preparation8.1 Prepare three test specimens from each lot of material by hot-pressing

22、the ethylene polymer at a suitable temperature3The sole source of supply of the apparatus known to the committee at this time is The Kodak neutral density filter, No. 5, available from the Eastman Kodak Co Ifyou are aware of alternative suppliers, please provide this information to ASTM Internationa

23、l Headquarters. Your comments will receive careful consideration at a meetingof the responsible technical committee, which you may attend.FIG. 1 Mold, Top PlatenD3349 122between highly polished plates, such as those shown in Figs. 1 and 2, using a charge sufficient to yield a specimen 40 to 50 mmin

24、diameter and approximately 0.01 mm in thickness. Double pressing expedites the preparation of satisfactory specimens, that is,pressing to approximately 0.05 mm thickness and then pressing a section of that sheet to the required 0.01 mm thickness. Use ofa silicone mold release agent is also recommend

25、ed. For each specimen in turn, carefully transfer the specimen to the inner ringof the specimen holder (Ring 1, Fig. 3). With the specimen positioned concentrically over the inner ring, carefully press the outerring (Ring 2, Fig. 3) down over it to complete the mounting operation. Mount the specimen

26、 firmly, taut, and wrinkle-free. Visuallyexamine the mounted test specimen against a suitable light source. It must be uniform in color and free of clear spots or holes.Mark and identify three points approximately 120 apart on the outer ring of each specimen.9. Procedure9.1 Bring the first mounted s

27、pecimen into measuring position using the remaining outer position of the specimen holder, keepingthe specimen as close to the receiver as possible. Position the specimen with one of the 120 marks at the top. Open the shutter,read and record the absorbance value v1. The absorbance value recorded is

28、equal to that indicated on the meter plus the measuredvalue for the reference material.9.2 Close the shutter and recheck the reference material. Rotate the specimen to bring the next 120 mark to the top and obtainthe absorbance value v2. Repeat the procedure with the third 120 mark at the top to obt

29、ain the value v3. Average the values v1,v2, and v3to obtain the average absorbance v. If any value of v differs from v by more than 10 %, discard the specimen and replaceit.9.3 Remove the film from the specimen mounting rings by cutting it carefully along the boundary between the two rings andFIG. 2

30、 Mold, Bottom PlatenD3349 123weigh it to the nearest 0.0001 g. The No. 11 Bard-Parker scalpel blade4in a suitable handle has been found very effective for thecutting operation. Measure the diameter and calculate the area of the specimen. Calculate average specimen thickness as follows:t 5 102 2W!/DA

31、! (1)where:t = thickness, m,W = weight, g,D = density, g/cm3, andA = area, cm2.NOTE 3The nominal density value for black low density ethylene polymer is 0.932 g/cm3.9.4 Repeat 9.1-9.3 for the second and third specimens.10. Calculation10.1 Calculate the absorption coefficient of each specimen, in tur

32、n, as follows:a 5 102 32.303v!/t! (2)4The sole source of supply of the apparatus known to the committee at this time is the No. 11 Bard-Parker scalpel blade, available from most laboratory supply houses.If you are aware of alternative suppliers, please provide this information to ASTM International

33、Headquarters. Your comments will receive careful consideration at a meetingof the responsible technical committee, which you may attend.NOTE 1AIf required, adjustm enitsher to the inside diameter of Ring 2 or outside diameter of Ring 1 may be necessary to obtain a snug fit of pressedfilm.FIG. 3 Spec

34、imen Mounting RingsD3349 124where:a = absorption coefficient, 1000 (absorbance/metre), at 375 nm,v = average absorbance as found in 9.2, andt = thickness, m, as found in 9.3.10.2 Average the three values, a, for the three specimens to obtain the value for the sample.11. Report11.1 Report the followi

35、ng:11.1.1 Complete identification of the material tested,11.1.2 Nominal density of the material tested,11.1.3 Calculated absorption coefficient of each specimen tested,11.1.4 Average absorption coefficient of three specimens tested, which is the value for the sample, and11.1.5 Type and model of spec

36、trophotometer used.11.1.6 Date of test11.1.7 Name of operator12. Precision and Bias12.1 Precision:12.1.1 In the early 1970s, a round-robin study was conducted by five laboratories using one sample of carbon black-pigmentedethylene polymer and the same make and model of spectrophotometer. Each labora

37、tory molded from two to five test specimensfrom the sample and determined the absorption coefficient of each. The following statistics, each expressed in the units of 1000(absorbance/metre), were derived from the data submitted for this one sample.Mean = 443Sr=24SR=4312.1.2 Interpretation of the dat

38、a for the intervals Srand SRgiven above are as follows.12.1.2.1 RepeatabilityIn comparing two averages (of three specimens each) for the sample obtained in one laboratory by oneoperator on the same day, the averages are judged as not equivalent if they differ by more than Sr.12.1.2.2 Reproducibility

39、In comparing two averages (of three specimens each) for the sample obtained in different laboratoriesby different operators on different days, the averages are judged as not equivalent if they differ by more than SR.12.1.2.3 The judgments in 12.1.2.1 and 12.1.2.2 will be correct in approximately 95

40、% of such comparisons.12.2 Bias:12.2.1 In the round-robin study, it was found that different makes and models of spectrophotometer can produce systematicallydifferent results for the average absorbance of a specimen, with the maximum consistent difference being 6 % relative for the fourtypes of inst

41、rument used in the study.12.2.2 In critical applications, such as conformance of a material to a specification, it is necessary for the buyer and seller toagree upon the instrument that is to be used or to establish a correlation between the two types of instruments in use.13. Keywords13.1 absorptio

42、n coefficient; carbon black; ethylene polymerSUMMARY OF CHANGESCommittee D09 has identified the location of selected changes to this test method since the last issue,D3349 06, that maycan impact the use of this test method. (Approved AprilJanuary 1, 2006)2012)(1) Revised Section 1, Section 5, Sectio

43、n 8, Section 11, and Section 12) Corrected non-mandatory language and clarified Note 1.(2) Changed note in Fig. 3.ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly adv

44、ised that determination of the validity of any such patent rights, and the riskof infringement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either

45、 reapproved or withdrawn. Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. I

46、f you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Indivi

47、dual reprints (single or multiple copies) of this standard may be obtained by contacting ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).D3349 125

copyright@ 2008-2019 麦多课文库(www.mydoc123.com)网站版权所有
备案/许可证编号:苏ICP备17064731号-1