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Product Name：polypropylene
Molecular format:[C3H6]n
CAS No.:9003-07-0
Product molecular
structure:
Chemical Properties:
Polypropylene is a low-density resin that offers a
good balance of thermal, chemical, and electrical properties, along with
moderate strength. Strength can be significantly increased by using reinforcing
agents such as glass fiber. Polypropylene has limited heat resistance, but it
can be used in applications that must withstand boiling water or steam
sterilization.
Polypropylenes can resist chemical attack and are unaffected by aqueous
solutions of inorganic salts or mineral acids and bases, even at high
temperatures. They are not attacked by most organic chemicals, and there is no
solvent for these resins at room temperature. The resins are attacked, however,
by halogens, fuming nitric acid, other active oxidizing agents, and by aromatic
and chlorinated hydrocarbons at high temperatures .
Polypropylene is translucent and autoclavable. Properties can be improved by
compounding with fillers, by blending with synthetic elastomers, and by
copolymerizing with small amounts of other monomers.
Application:
Polypropylene (PP) is a thermoplastic material used in a wide variety of applications including packaging, labeling, textiles, etc. Due to high processability and low cost, PP is one of the most extensively produced polymers, especially, for auto industry. Pristine PP is resistant to photo-oxidation and thermal oxidation at moderate temperatures. However, PP is sensitive to various external aging environments (such as heat, light, and radiation), and, hence, has a relatively low service temperature.When PP is exposed to high temperatures or to an irradiation environment, the tertiary hydrogen atoms present in PP chains are susceptible to be attacked by oxygen. It is well known that PP oxidation depends on both light and temperature in outdoor aging conditions. PP can also be photo-degraded because several molecular chains are affected in the wavelength range from 310 to 350 nm.