Send the link below via email or IMCopy
Present to your audienceStart remote presentation
- Invited audience members will follow you as you navigate and present
- People invited to a presentation do not need a Prezi account
- This link expires 10 minutes after you close the presentation
- A maximum of 30 users can follow your presentation
- Learn more about this feature in our knowledge base article
Do you really want to delete this prezi?
Neither you, nor the coeditors you shared it with will be able to recover it again.
Make your likes visible on Facebook?
You can change this under Settings & Account at any time.
Natural Rubber or Cyanoacrylate?
Transcript of Natural Rubber or Cyanoacrylate?
The Adhesive Showdown:
* Are synthetic adhesives more sustainable than natural adhesives?
* Are synthetic adhesives more desirable in terms of their properties, strength, cost, environmental impact and safety?
What Makes a successful Adhesive?
Must be able to:
- develop strength
- remain stable
2 Methyl Cyanoacrylate
Step 1: cyanoacrylate monomer
.....A sticky situation
A natural polymer adhesive
Step 2: Double bond is broken
Step 1: isoprene monomer
Step 3: additional isoprene monomers are joined from the broken double bond
This is addition polymerisation
The shape is linear and uniform
This means it is non polar
Strongest bonds are double bonds
Cis configured hydrogen bonds prevents close interaction
A synthetic adhesive
In the presence of OH- ions the double bonds are broken
OH- ions donate an
electron pair to
Addition of monomer
This is anionic polymerisation
Rigid and crystalline structure
Strong triple bond
* set structure
* crystalline and rigid
* cannot be melted or reshaped
The polymers at a glance...
Which polymer comes out on top?
And the winner is.....
2 methyl cyanoacrylate
the stronger, more durable adhesive
To ensure it remains a viable household glue for years to come this polymer's properties should be refined