Bend Test Determinations of Various Polymer Coatings
TEACHER NOTES
Objectives:
Students will:
Applicable Science Concepts:
Supplies:
Diameter in(mm) | Object |
1(25) | 30mL syringe |
3/4(19) | white board marker |
1/2(12.7) | sharpie marker with added tape |
3/8(9.5) | pen |
1/4(6.4) | pencil |
1/8(3.2) | #3 allen wrench |
Safety:
Manufacturers provide instructions for the use of their products, and these instructions should be followed completely. Protective gloves and lab coats should be used when preparing and handling the glass slides with coatings, and safety glasses should be used at ALL times.
Activity:
Taken from the ASTM Standard Test Method for Mandrel Bend Test of Attached Organic Coatings: ASTM D 522 - 88 http://www.astm.org/cgi-bin/SoftCart.exe/BOOKSTORE/COMPS/CONTENTS/71.html?L+mystore+mhth9641
Preparation:
Investigation Procedures:
Report:
Conclusions:
Have groups of students share their data with other groups by putting their data either on the board or on an overhead. Students should discuss why bendability is important. Where would you use stiff or flexible coatings? Why? They can then compare the results of the bendability test to other physical characteristics they have already observed.
OUR TEST RESULTS (Diameter in.(mm)):
A: Armorall Car Wax – 1 (25) | E: Epoxy – 1 (25) |
B: 100% Acrylic Latex – none | F: Krylon Spray Enamel – none |
C: Oil Based High Gloss Enamel – none | G: Kilz Spray – 3/4(19) |
D: Krylon Fusion – 1/4(6.4) | H: Kilz in a Can – none |
Polymer Science Learning Center | Department of Polymer Science | University of Southern Mississippi
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