1. abcit Characterization of Polyammides

2. abcit 3 methods p Infrared Spectroscopy p Differential Scanning Calorimetry p Dynamic Mechanic Analysis

3. abcit Infrared Spectroscopy p We send an infrared beam on the sample p The radiation will be attenuated only at specific wavelenghts p The graph is called Spectrum and is a “fingerprint” of every molecule

4. abcit PA 6

5. abcit PA 6,6

6. abcit Overlay of PA 6 and 6,6

7. abcit Differential Scanning Calorimetry

8. abcit DSC of PA 6

9. abcit StepScan DSC of Nylon p Nylon 6 polymers yield simultaneous moisture evolution peak and plasticized Tg p Standard DSC has difficulty detecting plasticized Tg because of moisture peak p StepScan DSC can separate out the moisture evolution peak (‘slow’ process) from the Tg (‘fast’)

10. abcit StepScan DSC of Ambient Humidity Nylon 6 Fibers

11. abcit StepScan DSC of Saturated Nylon 6 Fibers

12. abcit StepScan DSC of Dry Nylon 6 Fibers

13. abcit Dynamic Mechanic Analysis

14. abcit A typical DMA curve...

15. abcit PA 6 PA 12 Moisture effect on DMA of PA 6 and 12

16. abcit Frequency effect on Modulus   ＰＭＭＡ （ 0.01 ～ 100Hz ）

17. ABCDT