Characteristics and Applications of Polymers - Stress-Strain Behavior

6 important questions on Characteristics and Applications of Polymers - Stress-Strain Behavior

Which parameters are used to determine the polymer properties and how do they differentiate from metals?

- Modulus of elasticity
- Yield strength
- Tensile strength
The difference is the high sensitivity to:
- rate of deformation
- temperature
- chemical nature of the environment

What typical stress-strain behavior is found for polymers?

A: brittle polymers
B: Plastic polymers
C: Elastomers

How are yield and tensile strengths determined for polymers?

Yield strength is the maximum of the curve and for tensile strength the point of fracture is taken.
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What is the range of the modulus of elasticity for polymer materials?

Between 7 MPa and 4 GPa.

What is the difference in tensile strength for polymers and metal alloys?

Maximum tensile strength for polymers is about 100 MPa.
For metal alloys it is about 4100 MPa.

What is the influence of temperature on the stress-strain behavior of polymers?

Around room temperature there is a great effect.

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