Polymer Processing 11/23/10

Polymer Processing 11/23/10 - Processing of both composite...

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Processing of both composite materials and polymer materials at the same time. Polymer Processing Thermoplastics Typically use heat to reduce strength, increase ductility, and the form t shape may also melt When you melt thermoplastics it's still viscous not like water that you can pour Thermosets Must form and cure at the same time Can use heat and pressure or a chemical reaction for curing o Extrusion Used primarily for thermoplastics Usually the extrusion used with thermoplastics is a screw like extrusion Hollow tubes, rods, constant cross section items o Injection Molding Heat-inject-cool-remove o Reaction Injection Molding Similar- but uses two liquids that react from a thermosetting material Don't have to heat but mist wait for the part to cure o Blow Molding Used for thermoplastics Technique is used to form bottles Similar to what we did with glasses: Start with a pre-form that is somewhat hollow Called a parson See bottle drawing b/c I can't draw like him and I refuse to continue trying Transfer to final mold
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This note was uploaded on 06/28/2011 for the course MSE 280 taught by Professor Dr.barryandrews during the Fall '10 term at University of Alabama at Birmingham.

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Polymer Processing 11/23/10 - Processing of both composite...

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