100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
Summary ALEVEL CHEMISTRY - Introduction Monomers and Polymerisation Notes $4.39
Add to cart

Summary

Summary ALEVEL CHEMISTRY - Introduction Monomers and Polymerisation Notes

 5 views  0 purchase
  • Course
  • Institution

Introduction Monomers and Polymerisation Notes

Preview 1 out of 2  pages

  • July 31, 2023
  • 2
  • 2022/2023
  • Summary
avatar-seller
Introduction: Monomers and Polymerisation
Polymers are long chained molecules - long repeating units - made when many small molecules
called monomers join together.
Addition Polymers
Double bonds in alkenes can open up and join together to make long chains called polymers.




n stands for the number of repeating units in a polymer
Alkene monomers are unsaturated and once they form polymers they become saturated. There
are only single bonds in the C-C chain so the main carbon chain is non polar. This results in
polymers being very inert and un-reactive - not biodegradable.
The monomers have strong covalent bonds but the intermolecular forces are much weaker.
Longer chains with fewer branches have stronger intermolecular forces making these polymers
stronger and more rigid.
Having many branches makes it difficult for the chains to pack close together so they only form
weaker Van Der Waals forces. These materials are more flexible.
Conditions for addition polymerisation - H+ as catalyst - concentrated sulphuric acid.
Poly(chloroethene)
PVC is formed from chloroethene monomers.
The covalent bonds between the Cl and C are polar with chlorine being more
electronegative. This means there are permanent dipole-dipole forces. This makes PVC
hard and brittle used to make drain pipes and window frames.
Plasticisers
Plasticisers modify polymers properties. Adding them makes polymers bendier as the
plasticiser gets in between the polymer chains pushing them apart. This reduces the strength
of the intermolecular forces between the chains so they can slide around and are more flexible.
Plasticised PVC is more flexible than rigid PVC so it is used for electrical cable insulation,
clothing and floor tiles.

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

Guaranteed quality through customer reviews

Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.

Quick and easy check-out

Quick and easy check-out

You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.

Focus on what matters

Focus on what matters

Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!

Frequently asked questions

What do I get when I buy this document?

You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.

Satisfaction guarantee: how does it work?

Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.

Who am I buying these notes from?

Stuvia is a marketplace, so you are not buying this document from us, but from seller ramiriam. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for $4.39. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

52510 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 14 years now

Start selling
$4.39
  • (0)
Add to cart
Added