Abcit Characterization of Polyammides. abcit 3 methods p Infrared Spectroscopy p Differential Scanning Calorimetry p Dynamic Mechanic Analysis.

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Presentation transcript:

abcit Characterization of Polyammides

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

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

abcit PA 6

abcit PA 6,6

abcit Overlay of PA 6 and 6,6

abcit Differential Scanning Calorimetry

abcit DSC of PA 6

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’)

abcit StepScan DSC of Ambient Humidity Nylon 6 Fibers

abcit StepScan DSC of Saturated Nylon 6 Fibers

abcit StepScan DSC of Dry Nylon 6 Fibers

abcit Dynamic Mechanic Analysis

abcit A typical DMA curve...

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

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

ABCDT

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