Materials- polymers
- Created by: Erin Barker
- Created on: 24-09-19 17:46
View mindmap
- Polymers
- Thermosetting polymers
- can't be repeatedly reheated and reshaped
- cant be recycled after initial use
- when heated undergoes a chemical change whereby molecules form rigid cross links
- Examples
- Urea Formaldehyde
- hard
- heat resistant
- electrical insulator
- brittle
- electrical fittings
- adhesives
- Melamine Formaldehyde
- hard
- opaque
- tough
- heat resistant
- food safe
- chemical resistant
- decorative laminates
- picnic ware
- buttons
- Polyester resin
- rigid
- heat resistant
- chemical resistant
- brittle
- castings for boat hulls, car parts and chair seats
- Epoxy Resin
- rigid
- clear
- hard
- tough
- chemical resistant
- adhesives
- surface coatings
- cardiac pacemakers
- Urea Formaldehyde
- Thermosetting polymer
- can be repeatedly reheated and reshaped
- recycled after initial use
- Examples
- LDPE
- very tough
- good chemical resistance
- weatherproof
- low level of rigidity
- squeeze detergent bottles
- toys
- carrier bags/bin liners
- food wrap/trays
- HDPE
- weatherproof
- tough
- good chemical resistance
- toys
- household/ kitcheward
- buckets
- bowls
- Polypropylene
- translucent available
- good chemical resistance
- weatherproof
- tough
- medical equipment
- rope
- folders
- food containers
- HIPS
- hard
- rigid
- tough
- yoghurt pots
- signle use cups
- toilet seats
- ABS
- extremely tough
- hard
- opaque (available)
- telephone handsets
- rigid luggage
- food mixers
- handles
- Nylon
- tough
- corrosion resistant
- good temp resistance
- low coefficient of friction
- Bearings, gears
- cable ties
- curtain rails
- LDPE
- long linear chain molecules held by van der Walls forces
- Elastomers
- material which at room temp can be deformed under pressure and return to original shape
- weak bonds- stretch easily
- examples
- Butadiene Rubber
- tough
- excellent wear resistance
- thermal resistance against friction
- electrical insulator
- vehicle tyres
- shoe soles
- toys
- conveyor belts
- Neoprene
- good thermal resistance
- toughness
- good oil and chemical resistance
- weather resistant
- abrasion resistant
- electrical insulator
- wetsuits
- laptop cases
- automotive industry
- Silicone
- good flexibility
- poor abrasion resistance
- thermal resistance
- weather resistance
- lubricating qualitites
- electrical insulator
- flexible ice cube trays
- bakeward/ cooking utensils
- sealants
- medical uses
- mould making
- natural rubber
- tough
- good hardness
- low elongation
- high tensile strength
- electrical insulator
- cold resistance
- automotive industry
- balloons
- toys
- footwear
- Butadiene Rubber
- Thermosetting polymers
- natural rubber
- tough
- good hardness
- low elongation
- high tensile strength
- electrical insulator
- cold resistance
- automotive industry
- balloons
- toys
- footwear
Comments
No comments have yet been made