poly(propylene carbonate)
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Polypropylene carbonate (PPC), a
copolymer In polymer chemistry, a copolymer is a polymer derived from more than one species of monomer. The polymerization of monomers into copolymers is called copolymerization. Copolymers obtained by copolymerization of two monomer species are sometimes c ...
of
carbon dioxide Carbon dioxide (chemical formula A chemical formula is a way of presenting information about the chemical proportions of atom An atom is the smallest unit of ordinary matter In classical physics and general chemistry, matter is ...

carbon dioxide
and
propylene oxide Propylene oxide is an organic compound with the molecular formula CH3CHCH2O. This colourless volatility (chemistry), volatile liquid with an odour resembling ether, is produced on a large scale industrially. Its major application is its use for the ...

propylene oxide
, is a
thermoplastic A thermoplastic, or thermosoft plastic, is a plastic polymer A polymer (; Greek ''wikt:poly-, poly-'', "many" + ''wikt:-mer, -mer'', "part") is a Chemical substance, substance or material consisting of very large molecules, or macromolecules, ...
material.
Catalyst that utilizes a low-temperature oxidation catalyst to convert carbon monoxide to less toxic carbon dioxide at room temperature. It can also remove formaldehyde from the air. Catalysis () is the process of increasing the reaction rate, rate of a ...

Catalyst
s like zinc glutarate are used in polymerization.


Properties

Polypropylene carbonate is soluble in chemical polarity, polar solvents like lower ketones, ethyl acetate, dichloromethane and chlorinated hydrocarbons and insoluble in solvents like Alcohol (chemistry), alcohols, water, and aliphatic hydrocarbons. It also forms stable emulsions in water. PPC allows the diffusion of gases like oxygen through it. Having a glass temperature (Tg) between 25 and 45 °C, PPC binders are amorphous. The glass temperature of PPC is slightly greater than polyethylene carbonate (PEC). Its refractive index is 1.46 while its dielectric constant is 3.


Applications

Polypropylene carbonate is used to increase the toughness of some epoxy resins. It is used as a sacrificial binder in the ceramic industry, which decomposes and evaporates during sintering. It has a low sodium content which makes it suitable for the preparation of electroceramics like dielectric materials and piezoelectric ceramics. Composites of polypropylene carbonate with starch (PPC/starch) are used as biodegradable plastics. One of the largest manufacturers of polypropylene carbonate is Empower Materials, located in New Castle, DE, USA.


References


Further reading

*{{cite book, author=Ahluwalia V.K. & Anuradha Mishra, title=Polymer Science : A Textbook, url=https://books.google.com/books?id=F-GwABKbglYC&pg=PA161, accessdate=9 July 2012, date=1 January 2007, publisher=Ane Books India, isbn=978-81-8052-151-5, pages=161–


External links


Material properties of Polypropylene carbonate
Plastics Polycarbonates Biodegradable plastics