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General
- Polyoxymethylene (POM),
in the USA also commonly known under DuPont's brand name Delrin, is an
engineering plastic, a polymer with the chemical formula -(-O-CH2-)n-. It
is often marketed and used as a metal substitute.
- Delrin is a
lightweight, low-friction, and wear-resistant thermoplastic with good
physical and processing properties and capable of operating in
temperatures in excess of 90 degrees celsius. According to the material
safety data sheet from DuPont, the material has a slight odor of
formaldehyde.
Process
- MEAUS process where
isotactic poly(4-methyl-1-pentene)(PMP) was utilized, the melt-flow
behavior and its orientation prior to crystallization play critical roles
in the formation of the morphological features and orientation of the
crystallized film.
- MEAUS utilized to make
microporous membranes.
- Preparation of POM or
nanohydroxyapatite composites is done by melt processing.
Technology
- POM is manu-factured by
polymerization of formaldehyde or by copolymerization of tri-oxane and
ethylene oxide, which furnishes a more thermally stable form.
- Microscopic techniques
such as TEM and HREM are most commonly used to describe the nanoscale
dispersion of the clay in the polymer and are considered to be a tool that
provides more adequate information on the nanostructures in comparison to
X-ray diffraction methods.
Market
- Asahi will focus on its
polyphenylene ether powder and modified PPE projects in Jurong
Island,Singapore, with JV partner Mitsubishi Gas Chemical of Japan.
- Polyacetal, an
engineering plastic, is often used in electronics, automotive and other
industrial applications.
- The demand for polymers
grows with the arrival of new polyacetal grades which unveil novice
applications in many areas, including medicine, sanitary , automotive
industry, and others. The demand for polyacetals has been growing
primarily in China.
Report
- The growth potential of
the Chinese market was cited as the primary reason that China was chosen
as the location for the new manufacturing plant. The current market for
polyacetal in China is estimated to be in excess of 100,000 tons per year.
- PP fibers are known as
effective material for the reduction in spalling. Newly developed
polyacetal fibers (referred to as “PA”), which are more effective to
resistance to spalling, are being used instead of PP fibers.
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