Karteikarten
polymers
Karten in diesem Stapel (7)
- 1what is a polymera long chain molecule made up of small chain molecule called monomers which is linked together.
- 2describe about weak forcesthey have an individual tangled chain that that has a weak intermolecular force which means that they can slide
- 3talk about thermosettingthermosoftening is an example of a weak force. they have no cross link between the polymer chain. because the layers can slide over each other, they can be remoulded and change into shape once cooled after being heated.
- 4describe about strong forcesthey have cross link between the polymer chain meaning that they have a solid structure. they have a strong inter molecular force
- 5describe about thermosettingthey have a cross link between the polymer chain. they are hard ,rigid and strong therefore they cant be shaped when they are heated. they cant be remoulded again
- 6what will affect the property of a polymerthe starting material and the reacting condition
- 7what two types of polythene could be made using different condition1. low density(LD)- when it's it's heated at high temperature(200) without using a catalyst under high pressure.eg: bags and bottles.
2. high desity-(HD) when its heated at low temperature and pressure using a catalyst. examples are water tank and drain pipes
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- Karteikarten am polymers, erstellt von divya.devanand am 13/10/2015.
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