Synthetic and natural polymers play an essential role in everyday life. Natural polymeric materials include shellac, amber, wool, silk and natural rubber, while the list of synthetic polymers includes synthetic rubber, phenol formaldehyde resin, neoprene, nylon, polyvinyl chloride, polystyrene, polyethylene, polypropylene, polyacrylonitrile, PVB, silicone, and many more. Polymers can be transparent to translucent, and are preferably measured using a transmittance instrument. However if you also measure opaque samples, you may prefer to select an instrument that measures in both transmittance and reflectance mode.
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