Polymers and Nanoscience
- Created by: rob.place01
- Created on: 12-06-17 19:35
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- Polymers and nanoscience
- Thermosoftenng
- Such as polyethene
- Consist of individual, tangled polymer chains
- Can be softened and melt when heated.
- Due to weak intermolecular forces which allow the chains to slide over each other easily
- Thermosetting polymers
- Consists of polymer chains with cross-links between them.
- They do not soften of melt when heated
- LDPE + HDPE
- Properties depend on the monomer that was used
- Ethene used to make poly(ethene) and propane used for poly(propene)
- LDPE - low-density polyethene is made at a different temperature and a different pressure that HDPE
- Different catalysts are also used
- Nanoscience
- Structures between 1nm and 100nm
- Nanoparticles may contain only a few hundred atoms. Their small size means they have:
- High surface area
- Uses of nanoparticles: Computers, Catalysts, Coatings, highly selective sensors, lighter and stronger construction materials, cosmetics
- Nanotube
- Nanotubes are made of carbon and have a structure similar to a graphite layer rolled into a tube
- They are: very strong and able to conduct electricity.
- Thermosoftenng
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