NAVISTAR CEMS DT-8-2004 Glass Content of Reinforced Plastics.pdf

1、INTERNATIONAL TRUCK AND ENGINE CORPORATION CEMS (CORPORATE ENGINEERING MATERIAL SPECIFICATION)NUMBER: CEMS DT-8 TITLE: Glass Content Of Reinforced Plastics CURRENT ISSUE DATE: December 2004 WRITTEN/REVIEWED BY: Materials Engineering APPROVED BY: Materials Engineering SUPERSEDES ISSUE OF: October 200

2、1 PRINTED COPIES OF THIS DOCUMENT MUST BE VERIFIED FOR CURRENT REVISION This specification may involve hazardous materials, equipment, and procedures. This specification does not purport to address all of the safety issues associated with its use. The user is responsible to consult appropriate safet

3、y and health practices and to determine the applicability of regulatory limits prior to use. Change Notice: Editorial Changes; Revised equation in Section 4.18 1.0 SCOPE This is a thermal (ASH) method for determining the glass content of glass reinforced plastic components. 2.0 APPARATUS 2.1 Three C

4、eramic Crucibles 2.2 Furnace (capable of 538C/1000F minimum) 2.3 Oven (capable of 110C/230F) 2.4 Bunsen Burner 2.5 Matches or Flint Igniter 2.6 Glass Rod 2.7 Three 250 ml Glass Beakers 2.8 Rubber Policeman 2.9 Distilled Water 3.0 MATERIAL 3.1 Hydrochloric Acid (10%) 3.2 Nitric Acid (10%) 3.3 Liquid

5、Paper 4.0 PROCEDURE 4.1 Wash and dry the crucibles and glass beakers. 4.2 Label each crucible with liquid paper. Place labeled crucibles in the oven to remove moisture from the crucibles and ink. 4.3 Remove crucibles from the oven and let cool to ambient in a desiccator. 4.4 Tare the balance. Place

6、one crucible on the balance and record weight. Place one sample in crucible on balance and record weight of the crucible plus the sample. 4.5 Repeat step 4.4 with the remaining two samples. 4.6 Support the three crucibles in a fume hood so that a bunsen burner can be passed under each crucible. Turn

7、 on the fume hood and ignite the bunsen burner. Set the burner under each crucible until the samples are charred and will no longer support a flame. This document is restricted and may not be sent outside International Truck and Engine Corporation or reproduced without permission from Corporate Tech

8、nical Standards. Suppliers are required to assume all patent liability. 2004 by International Truck and Engine Corporation. December 2004 Page 1 of 2 NUMBER: CEMS DT-8 TITLE: Glass Content Of Reinforced Plastics CURRENT ISSUE DATE: December 2004 4.7 Remove the flame and let the samples cool to ambie

9、nt. 4.8 Place the three crucibles in a furnace at 538C/1000F minimum for 4 to 8 hours or until the charred samples and crucibles have changed colors from carbon black to a white or gray ash. 4.9 Remove the crucibles from the furnace and cool to ambient. 4.10 After cooling, move the samples to the fu

10、me hood and slowly add HCl (10%) to the crucibles until the samples are immersed in the acid solution. (At this time, foaming will occur if the samples contain carbonate fillers). After foaming stops, decant the acid solution into a 250ml glass beaker (labeled identical to the crucible being decante

11、d). Add more acid solution to each sample to confirm that the carbonate fillers have been dissolved. 4.11 Decant and rinse the samples with distilled water. Decant again into the appropriate beaker. (If there are some solids remaining that are unreactive with HC1 solution, repeat step 4.10 using nit

12、ric acid). 4.12 Decant into the appropriate beaker and rinse with distilled water. (Any remaining solids or dirt must be considered unreactive filler and must be removed by mechanical agitation followed by decanting.) 4.13 Using a glass rod, mechanically agitate the glass and dirt so that a suspensi

13、on is created. Quickly decant into the appropriate beaker. Repeat this procedure with each sample until the glass fiber is sufficiently clean. 4.14 Slowly rinse and decant each beaker into the sink until the beaker is empty or some clean glass is apparent at the bottom of the beaker. If there is gla

14、ss, collect the glass with an appropriate tool such as a rubber policeman” and add this glass to the originating crucible. 4.15 Place the three crucibles in an oven at 110C/230F for one hour. Remove the samples from the oven and fluff with a glass rod. Again place the crucibles into the oven at 110C

15、/230F for another hour. 4.16 Remove the samples and let them cool to ambient in a desiccator. 4.17 Weigh and record the weight of the samples in their respective crucibles. 4.18 Calculate the percentage glass content using the formula below: Final sample weight - crucible weight X 100% Original samp

16、le weight crucible weight 5.0 REPORT Report the glass content by percentage. This document is restricted and may not be sent outside International Truck and Engine Corporation or reproduced without permission from Corporate Technical Standards. Suppliers are required to assume all patent liability. 2004 by International Truck and Engine Corporation. December 2004 Page 2 of 2