Address
phone
directions
We blog only about timely and relevant topics.  The software does not allow rearranging posts, so they are chronological.  You can browse by topic or keywords by scrolling down on the right side.

Brentwood Plastics Blog

Homopolymers, Copolymers and Terpolymers - easy as 1, 2, 3

Posted by Joel Longstreth on Thu, Mar 31, 2016 @ 06:16 PM

The terms homopolymer, copolymer and terpolymer may sound like Latin or Greek to you.  In any case, they're not complicated.

Let's start with the common thread "polymer" first.  " Poly " comes from the Greek word for many.  As it pertains to plastic, it means many of the building blocks of monomers such as ethylene, propylene, styrene, etc. strung together in long chains to add up to polymers.

For more in-depth, visit our post on "where does plastic come from ? "

If the polymer is made simply from only one monomer, it is called a HOMOpolymer, or made from only one monomer.  POLYethylene, POLYpropylene, POLYstyrene, etc.  Far as I can tell, 1,2 Syndioatctic Polybutadiene is a homopolymer even thought the word is long.  Butadiene is the only monomer.

You guessed it - if there is another conjoined monomer ( not a mechanical blend ), you got a COpolymer.  Examples:  "ethylene vinyl acetate" or EVA for short - vinyl acetate monomer married to ethylene monomer, "styrene butadiene styrene" or SBS - styrene and butadiene building blocks,

And a TERpolymer is three monomers.  An oldie-but-goodie example is old fashioned phones which were made from "acrylonitrile butadiene styrene" or ABS.  Jump cut to present day - ABS is the default choice for 3 D printing.  Ethyl Methyl Acrylate, or EMA is all around us in upholstery commonly referred to as the "quiet film"

oldphone.jpgphoto courtesy of The Cathedral of Junk in Austin, TX

Read More

Topics: polymers, copolymer, homopolymer, plastic

Plastics in-depth and insights

 

Plastic Blogs

Subscribe by Email

Most Popular Posts

Browse by Tag