ImageVerifierCode 换一换
格式:PDF , 页数:4 ,大小:50.38KB ,
资源ID:747769      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-747769.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(FORD FLTM EU-AU 050-2-2000 DETERMINATION OF CHLORINE CONTENT OF HIGH FREQUENCY ADHESIVES.pdf)为本站会员(syndromehi216)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!

FORD FLTM EU-AU 050-2-2000 DETERMINATION OF CHLORINE CONTENT OF HIGH FREQUENCY ADHESIVES.pdf

1、 FORD LABORATORY TEST METHOD EU-AU 050-02 Date Action Revisions 2000 08 30 Revised Editorial no technical change A. Cockman 2000 05 18 Edi torial no technical change A. Cockman 1993 01 04 Printed copies are uncontrolled Page 1 of 4 Copyright 2000, Ford Global Technologies, Inc. DETERMINATION OF CHLO

2、RINE CONTENT OF HIGH FREQUENCY ADHESIVES Application This procedure is used to determine the percentage of chlorine in PVC copolymer high frequency adhesives based on solid content. The material under test is volatilized by heating in an oxygen stream and totally burnt in an oxyhydrogen flame. The c

3、ombustion products are absorbed in a receiver. Apparatus and Reagents Required Combustion Apparatus For solid substances. Dr. Wickbold system (see sketch) Type 3. Source: Heraeus - Schott Quarzschmelze GmbH 6450 Hanau Germany pH Meter With glass electrode suitable for pH measurement. For the potenti

4、ometric titration a combined comparison electrode (Ag - AgCl) is required. (Reference solution KNO 3 saturated.) Magnetic Agitator and Stirring Rods Measuring Flasks 100 mL Beakers 250 mL Burettes 25 mL Fish Tail Burner Vacuum Pump Analytical Balance Quartz Combustion Boats FORD LABORATORY TEST METH

5、OD EU-AU 050-02 Page 2 of 4 Copyr ight 2000, Ford Global Technologies, Inc. Sodium Hydroxide Solution (NaOH) 1 Normal - for absorption. Sulphuric Acid (H2SO4) 20 % by Volume Prepared from 95 - 97 % sulphuric acid. Silver Nitrate Solution (AgNO3) 0.02 Normal. Potassium Pyrosulphate (K2S2O7) Condition

6、ing and Test Conditions All test values indicated herein are based on material conditioned in a controlled atmosphere of 23 +/ - 2 C a nd 50 +/ - 5 % relative humidity for not less than 24 h prior to testing and tested under the same conditions unless otherwise specified. Procedure 1. Weigh a specim

7、en of adhesive in a quartz boat to the nearest .1 mgf. The weight of the specimen used i s based on the chlorine content of the adhesive and must be chosen as follows: Approximately 25 mgf at 30 - 60 % Cl by weight Approximately 50 mgf at 10 - 30 % Cl by weight Minimum 100 mgf at 1 - 10 % Cl by weig

8、ht 0.5 - 3 g at below 1 % Cl by weight If inorganic substances are present in the adhesive, potassium pyrosulphate must be added to the sample to act as a flux. 2. The quartz boat is inserted in the gasifying chamber (A), the chamber locked with the ground glass joi nt (E) and the cock (F) opened. 3

9、. A 100 mL measuring flask is connected to the combustion apparatus. Open the cock between the combustion apparatus and the measuring flask. 4. Set under a vacuum of 150 - 300 mm mercury. 5. After opening of the cooling water valve, the burner (B) is ignited. The oxygen flow rate should be 1000 1/h

10、and hydrogen flow rate should be 400 1/h. The length of the oxyhydrogen flame is to be adjusted to approximately 10 cm. 6. The burner (B) is inserted into the ground glass joint and the absorption solution (NaOH) valve opened. The drop sequence is adjusted to 3 4 drops/s for chlorine traces and to 7

11、 - 8 drops/s for a higher chlorine content. FORD LABORATORY TEST METHOD EU-AU 050-02 Page 3 of 4 Copyr ight 2000, Ford Global Technologies, Inc. 7. After the cock (F) is closed the flow rate of oxygen in the gasifying chamber is adjusted to 200 1/h for substances with low carbon content, and for sub

12、stances with high carbon content of 600 1/h. To volatilize the material under test the gasifying chamber is heated from outside using the fish tail burner. The normal time for vol atilizing is approximately 2 minutes. Note: If the oxyhydrogen flame of the burner does not burn free of soot or the fla

13、me does not fill the combustion chamber, the flow rate of oxygen must be adjusted. 8. After combustion is complete, the fish tail bur ner is turned off, the quartz boat is removed and the cock (F) of the ground glass joint opened with the ground - in stopper (E) inserted. 9. Any specimen particles r

14、etained in the gasifying chamber are to be flushed into the oxyhydrogen flame by spraying s everal times with distilled water. 10. The absorption solution intake valve (S) and cock between the measuring flask and the receiver are closed. The measuring flask is removed and a new flask is attached for

15、 the next test. 11. On completion of the test , the hydrogen, oxygen, vacuum pump and cooling water are turned off, in this order. 12. The contents of the measuring flask are poured quantitatively into the 250 mL beaker. The distillate is acidified with the 20 % sulphuric acid to pH2 and is titrated

16、 with the 0.02 Normal silver nitrate solution. 13. Carry out a blank combustion test and determine the resultant titration value with 0.02 Normal AgNO 3 solution (blank value). Evaluation The chlorine content in percent by weight is calculated as follows : Chlorine (% weight) = 0.709 x (A - B) x 100

17、 W Where: A = Original titration value of 0.02 Normal AgNO 3 in mL. B = Blank titration value of 0.02 Normal AgNO 3 in mL. W = Weight of specimen in mfg. Note: In case of unforeseen difficulties, e. g., fracture of the apparatus, the hydrogen valve must be instantly closed. Chemicals, materials, par

18、ts, and equipment referenced in this document must be used and handled properly. Each party is responsible for determining proper use and handling in it s facilities. FORD LABORATORY TEST METHOD EU-AU 050-02 Page 4 of 4 Copyr ight 2000, Ford Global Technologies, Inc. DETERMINATION OF COATING WEIGHT

19、OF HIGH FREQUENCY ADHESIVES A. Gasifying Chamber S. Absorption Solution Intake Valve B. Burner for combustion of the VM. Vacuum Gauge volatilized specimen E. Ground Class Joint VP. Vacuum Pump F. Stop Cock R. Check Valve C. Combustion Chamber St. Flowmeter W. Cooling Water WB. Wing Burner D. Absorption Vessel

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