Testing abrasion resistance

AABB polyimides, synthesis of, 300-302 AA-BB-type polymers, 135 AA-BB-type sulfonylation, 330 AA monomers, 11-12 A-B-A triblock copolymers, 7 A-B copolymers, 7 AxBy monomers, 8 AB polyamides, 173-180 AB polyimides, 304-307 syntheses of, 306 Abrasion resistance test, 243-244 ABS. See Acrylonitrile-... 

Four standard rubbers are specified, two of which are the same as those given in ISO 4649. The other two are a high abrasion resistant SBR compound and a low abrasion resistant material which may be preferred for comparison with high and low abrasion resistant test materials respectively. For all three methods, the calculation of abrasion resistance index is specified. 

In the light of the above, contact abrasion methods can be classified into ordinary, used for measurements at room temperature, and high temperature. Classed among abrasion resistance test methods at room temperature are the following Bohme s, Mindt s, Harvey s, McGee s, Blondel s, dry friction with balls, dry friction without balls, and Siever s method. 

Hardness measurement through abrasion resistance tests has recently been a problem for basic research in the area of materials used for metallurgical, ceramic and other linings featuring heightened wear at high tempera-... 

PTFE compounds may contain other additives in the form of fiber or bead, which are less expensive than engineering pol5uners. Some useful fillers include glass, and metals oxidesl " which also induce abrasion resistance. Abrasion resistance testing in a push-pull cable indicated that inclusion of 10 parts per hundred (phr) of pol q)henylene sulfide (relative to PTFE) and 25 phr of glass beads increased the life... 

Abrasion Resistance Testing. In the chemical process industry, fluoropolymers are typically subjected to abrasive slurries. However, there is no standardized test for slurry abrasion. The Tabor abrader test (ASTM D3884), which measures the weight loss for a certain time using a grinding wheel, is done for comparison purpose only. 

Wear cycles In abrasion resistance tests using the Taber Abraser, the number of cycles of abrasion required to wear a film of specified thickness through to the test plate under a specified set of test conditions (Federal Standard 141a, Method 6192). 

There are many types of abrasion resistance tests for specific forms of abrasive materials and for specific applications and materials. The abrasives used in these tests include loose particle abrasives (ASTM D673 and D1242), abrasives bonded on cloth or paper (ASTM D1242), and standard abrasive wheels (ASTM D1044). ASTM D1044 evaluates the resistance of transparent plastics to surface abrasion by... 

Taber abrasion Taber abrasion is an abrasion resistance test that is widely used on plastic materials. It uses a Taber abrasion wheel with a specified abrasive, pressure, and rotational speed. Measurements are made to determine the weight loss of a sample during the test. ASTM D1044 specifies the use of the equipment. 

Abrasion resistance tests are generally undertaken using a rotating wheel lapping a surface. Some comparative data for resins are given in Figure 9.16. 

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