EMA 6165 - Polymer Physics Crystallinity Lecture 26

1. University of Florida: EMA 6165 Polymer Physics - A. Brennan 1 EMA 6165 - Polymer PhysicsCrystallinityLecture 26 Professor Anthony Brennan Department of Materials Science & Engineering University of Florida

2. Crystalline State Definition: Crystalline state diffracts x-rays and exhibits first order thermodynamic transitions. This is too specific since DSC, FTIR, NMR can measure crystalline behavior not measureable with x-rays. University of Florida: EMA 6165 Polymer Physics - A. Brennan 2

3. University of Florida: EMA 6165 Polymer Physics - A. Brennan 3 Outline General Features Crystal Architecture Single Crystal Morphology Spherulites Growth Processes Properties

4. University of Florida: EMA 6165 Polymer Physics - A. Brennan 4 Crystalline State Key Characteristics

5. University of Florida: EMA 6165 Polymer Physics - A. Brennan 5 Crystalline State Three key factors that lead to crystallization

6. University of Florida: EMA 6165 Polymer Physics - A. Brennan 6 Crystalline State

7. University of Florida: EMA 6165 Polymer Physics - A. Brennan 7 Crystalline State Miller Indices

8. University of Florida: EMA 6165 Polymer Physics - A. Brennan 8 Crystalline State

9. University of Florida: EMA 6165 Polymer Physics - A. Brennan 9 Lattices Cubic Tetragonal Orthorhombic Trigonal a = b = c a = b ¹ c a ¹ b ¹ c a = b = c

10. University of Florida: EMA 6165 Polymer Physics - A. Brennan 10 Lattices

11. University of Florida: EMA 6165 Polymer Physics - A. Brennan 11 Lattices WAXS Braggs Law (X-Rays)

12. University of Florida: EMA 6165 Polymer Physics - A. Brennan 12 Lattices

13. University of Florida: EMA 6165 Polymer Physics - A. Brennan 13 Crystalline Morphology Of Polymers Fringed Micelle

14. University of Florida: EMA 6165 Polymer Physics - A. Brennan 14 Crystalline Morphology Of Polymers Folded Chain Model

15. University of Florida: EMA 6165 Polymer Physics - A. Brennan 15 PE - Single Crystal PE single crystal

16. University of Florida: EMA 6165 Polymer Physics - A. Brennan 16 Switchboard Morphology

17. University of Florida: EMA 6165 Polymer Physics - A. Brennan 17 Adjacent Reentry Morphology

18. University of Florida: EMA 6165 Polymer Physics - A. Brennan 18 Non-adjacent Reentry Morphology

19. University of Florida: EMA 6165 Polymer Physics - A. Brennan 19

20. University of Florida: EMA 6165 Polymer Physics - A. Brennan 20 PE Unit Cell

21. University of Florida: EMA 6165 Polymer Physics - A. Brennan 21 Unit Cell Structural Dimensions - PE PE Orthorhombic cell

22. University of Florida: EMA 6165 Polymer Physics - A. Brennan 22 Spherulite Morphology

23. University of Florida: EMA 6165 Polymer Physics - A. Brennan 23 AFM Image of Spherulite Growth

24. University of Florida: EMA 6165 Polymer Physics - A. Brennan 24 Rate of growth

25. University of Florida: EMA 6165 Polymer Physics - A. Brennan 25 Rate of growth

26. University of Florida: EMA 6165 Polymer Physics - A. Brennan 26 Rate of growth Rate of Growth

27. University of Florida: EMA 6165 Polymer Physics - A. Brennan 27 Summary Unit cells basic structure of crystals Numerous Motiffs defined by unit cell dimensions Single crystals are the result of chain folding Three basic morphologies, switchboard, adjacent reentry and non adjacent reentry