1. Dynamic Mechanical Analysis Duncan Price IPTME, Loughborough University © Copyright: D.M.Price@lboro.ac.uk (2006)

2. mechanical testing

3. dynamic mechanical analysis

4. relationships

5. test configurations

6. Rubbery plateau is related to M e between cross-links or entanglements T ll in some amorphous polymers T m = melting (1) For thermosets, no T m occurs Rubbery plateau (2) In semicrystalline polymers, a crystal-crystal slip, T  * occurs For purely crystalline materials, T g occurs T g is related to molecular mass up to a limiting value  transitions are often related to the toughness typical behaviour

7. polycaprolactone

8. impact resistance in nylon

9. material specification

10. thermoset cure

11. determination of T g

12. effect of plasticiser

13. stress relief

14. PET

15. effect of frequency

16. frequency domain

17. frequency master curve

18. effect of molecular weight

19. gellation of polymer solution

20. thermoset curing

21. Gillham-Enns or TTT diagram

22. recommended reading M. Reading and P.J. Haines; “Thermomechanical, dynamic mechanical and associated methods” in; P. J. Haines; “Thermal methods of analysis: Principles, Applications and Problems” Blackie, London (1995) pp.123-160. K.P. Menard; “Dynamic Mechanical Analysis: A Practical Introduction to Techniques and Applications”, CRC Press, Boca Raton (1999) D. M. Price, “Thermomechanical and Thermoelectrical Methods”, in P.J. Haines (ed.) Principles of Thermal Analysis & Calorimetry, ch. 4, Royal Society of Chemistry, Cambridge (2002) pp. 94-128.