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IR review for Lab report 1. Nylon example What actually happened in Lab 2. Triethylenetetramine. Triethylenetetramine. Diethylene triamine. Diethylene triamine. Poly(bisphenol-A-co-epichlorohydrin). Poly(bisphenol-A-co-epichlorohydrin). Review of Heat Transfer. Caroline Schauer

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ir review for lab report 1

IR review for Lab report 1

Nylon example

What actually happened in Lab 2

© Caroline Schauer 2007

triethylenetetramine
Triethylenetetramine

© Caroline Schauer 2007

triethylenetetramine3
Triethylenetetramine

© Caroline Schauer 2007

diethylene triamine
Diethylene triamine

© Caroline Schauer 2007

diethylene triamine5
Diethylene triamine

© Caroline Schauer 2007

poly bisphenol a co epichlorohydrin
Poly(bisphenol-A-co-epichlorohydrin)

© Caroline Schauer 2007

poly bisphenol a co epichlorohydrin7
Poly(bisphenol-A-co-epichlorohydrin)

© Caroline Schauer 2007

review of heat transfer

Review of Heat Transfer

Caroline Schauer

Department of Materials Engineering

Drexel University

© Caroline Schauer 2007

steady state heat transfer
Steady State Heat Transfer

Fourier law

  • Plane:
  • Cylinder:
  • Sphere:

© Caroline Schauer 2007

non steady state heat transfer
Non-Steady State Heat Transfer

Fourier law

Few analytical solutions.

Numerical solutions via finite elements are easily obtained for complex geometries

© Caroline Schauer 2007

non steady state heat transfer11
Non-Steady State Heat Transfer

Plate:

Assuming highly effective removal

Of heat from the surface

© Caroline Schauer 2007

non steady state heat transfer12
Non-Steady State Heat Transfer

© Caroline Schauer 2007

convection
Convection

Heat removal

from surface due to

moving fluid

© Caroline Schauer 2007

convection limited cooling of an infinite plate
Convection limited cooling of an infinite plate

Tw=temp of cooling medium

Convection

limited

Conduction

limited

© Caroline Schauer 2007

convection how to determine h
Convectionhow to determine h?

To compute the convection coefficient evaluate properties at average temperature

© Caroline Schauer 2007

thermal conductivity

Semicrystalline

Amorphous

Thermal conductivity

© Caroline Schauer 2007

slide18

Recall that

conductivity -> steady state

diffusivity -> transient

Note the dip in diffusivity

Around melting point

© Caroline Schauer 2007

slide19

Specific

Heat

© Caroline Schauer 2007

slide20

Specific

Heat –

Effect of fillers

(glass fibers here)

© Caroline Schauer 2007