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Can you use Propylene Carbonate to test for internal stresses on the Polycarbonate plastic parts by dipping the part in Propylene Carbonate and look for cracks?
Wiki User
∙ 14y ago
Yes. It is a very rigorous test. Immerse part for 3 minutes; then wash thoroughly in water. If there are no visible cracks then the part has minimal stress. Poor mouldings will fail quickly eg less than 30 seconds. To remove all stresses in the Polycarbonate part, heat in an oven for 15mins at 130 degrees C. These parts, once cooled, will pass the test. Some Polycarbonate applications need 3minutes resistance; otheres may be acceptable at 1 minutes resistance. It depends on the part eg medical parts or parts that will be exposed to loads or chemicals need better resistance. Alternative tests for Polycarbonate; by volume; these are less rigorous: 15minutes immersion in 1:1 solution of n-proponal and ethyl acetate 3mins immersion in 1:3 solution of toluene and n-propyl alcohol matterbury@ait.ie
Wiki User
∙ 14y ago
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Why is annealing done?
Annealing can bring about ductility, soften material and it relieves internal stresses, This will improve the ability to work the metals when they are cold i.e. when bending steel in presses to make metal frames etc
Importance of studying strength of materials?
Strength of a material is usually given in terms of yield strength (the stress at which plastic deformation sets in) and ultimate strength (the maximum stress that the material can sustain) before it eventually breaks. On the other hand, it is not meaningful to talk about strength of a member made from that material. for a member of a certain geometry, one calculates stresses operating on it and compares the stresses to the strength. Stresses depend on load and the geometry both. If one wants to guard against failure of the member for yielding, then the stresses in the member should be less than or equal to the yield strength.
What happen when orange and baking soda are mixed?
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The energy possessed by a body by virtue of its position relative to others, stresses within itself, electric charge, and other factors. This stored energy of position is referred to as potential energy.
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Beta HCG is a molecule composed of two pieces: alpha and beta HCG. Free beta only stresses you're talking about a loose beta subunit instead of it assembled into the intact HCG molecule.
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Pre stressting, post stressing and loading.
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Why is annealing done?
Annealing can bring about ductility, soften material and it relieves internal stresses, This will improve the ability to work the metals when they are cold i.e. when bending steel in presses to make metal frames etc
Three causes of European expansion?
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Which insulate various internal organs from the stresses of body wall movement and allows organs to move and grow independently of the body wall?
a mantle
Why it is necessary to temper hardened steel immediately after quenching?
to avoid the high internal stresses caused by quenching and to get tempered Martensite that is less brittle
Post heating welded metal?
Vague question but I assume you mean annealing or stress-relieving, to remove internal stresses created by the welding heat.
What are the stresses on bridges?
There are a number of stresses inflicted upon bridges. Some of these stresses include compression, tension, as well as bending.
What has the author Raymond Jean Le Ber written?
Raymond Jean Le Ber has written: 'Stresses in pipe ells under internal pressure' -- subject(s): Mechanical engineering
What kind of stresses are produced in a beam during transverse vibration?
If you load it normal to the beam axis you get bending stresses ( tension and compression) and shear stresses. If you load it along the axis you get axial stress ( tension or compression)
