Engineering Science 1021A/B Lecture Notes - Lecture 30: Tensile Testing, Ductility
17 May 2018
School
Department
Professor
Thermosets: highly cross-linked polymers that form a 3-dimensinal network
Epoxies, phenolics
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Chains prevented from moving by the cross-links
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Chains cannot rotate or slide
Strength, stiffness and hardness are high
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Ductility and impact properties are low
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High glass-transition temperature
Stronger but more brittle
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In a tensile test, thermosetting polymers display the same behavior
as a brittle metal or ceramic
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They are often formed from one or more linear polymers
The application of heat/pressure or just mixing the components begins
the cross-linked reaction
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Cross-linking is not reversible
Once formed, thermosets cannot be reformed
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Functional Units/Applications for Selected Thermosets
Properties of Typical Thermosetting Polymers
Thermosetting Polymers
November 24, 2017
11:20 PM
