=>Back To Characterization Lab
DMTA Analysis of Polymers
Objective: Measure the dynamic mechanical loss and storage modulus as a function of frequency using time-temperature superposition (TTS) of dynamic mechanical analyzer (DMA) data at various temperatures from a rubbery sample (PDMS or butadiene rubber), a glassy sample (polycarbonate, polystyrene, polyethylene terephthalate (PET) or polymethylmethacrylate) and a semi-crystalline sample (polypropylene or polyethylene). Investigate the effects of filler on the DMA data and TTS.
Materials:
Rectangular samples of solid polymer: polydimethylsiloxane
(silicone rubber) PDMS or polybutadiene rubber, polycarbonate,
polystyrene or polymethylmethacrylate and polytetrafluoro
ethylene (PTFE), polypropylene or polyethylene. We will
use the Mettler Toledo DMA 861 in the Characterization
Lab. Nylon thread (glide dental floss) in air and in water
at 20 and 40C (see Mettler examples).
Procedure:
Analysis:
Questions (some are repeated from last lab but please
reanswer with more emphasis on NMR):