Question

Polymer Processing : Principles and Design (Baird).

4A.7 Poly(ethylene terephthalate) (PET) Pellet Drying. PET is a relatively hydrophobic polymer, which still needs drying before processing.

Calculate the temperature of the drying oven, so that the drying of spherical pellets, 3 mm in diameter, does not take more than 11 hours. Assume that the pellets were initially in equilibrium with air having 70% relative humidity.

Thank you for any help with this!

Answer 1

Polymer Processing and Designs: The operations carried out in polymeric materials or systems to increase their utility

By Chemical operation and Physical operation the polymers are processing

By Machine and Equipment Design P

lant Design and Operations Product Development: (the physical and chemical evaluation of materials)

Classification of processing:

Shaping(Froming) Extrusion, Coextrusion, Calendering, Blown film, Fiber Spinning, Injection Molding, Compression Molding, Blow molding, Thermoforming, Resin transfer molding, Pultrusion, Casting,

Bonding Heat sealing, Laminating, Coating

Modification Mixing and Compounding, Surface activation, Polymer modification(crystallization and orientation)

Designing:

Through many techniques, polymers are designed.

Melting

Pressurization and Pumping

Mixing

Devolatilization

Single Rotor Machines

Twin Screw and Twin Rotor Processing Equipment

Reactive Polymer Processing and Compounding

Die Forming,

Molding

Stretch Shaping

Calendering

Post Shaping Structuring, Decorating, Fastening, Sealing, Welding, Dyeing, Electroplating, Vaccum metallizing, Printing, Painting, etc.