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Rubber vs Polyethylene watch

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    I've printed off the spec from the WJEC and seem to have nothing in my notes from school on this, and i can't seem to find an answer to it in the textboox we have =/


    SPEC - " Compare the behaviour of rubber and polyethylene in terms of molecular structure and behaviour under stress with reference to also to the effeect of temperature. Understand the importance of hysteresis in rubber. "


    Now i understand the weird rubber stress/strain graph and the hysteresis loop. But in terms of temperature all i know is that thermosetting polymers turn brittle under heat and thermoplastics can be remoulded (porbably nothing to do with this...)

    But in terms of molecular structure i haveno idea, i don't take chemsitry and was uselss at GCSE so any lamenst terms would be appreciated!

    Sorry to be a pain, but it's worryin me quite a bit lol :L
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    (Original post by boodeny)
    I've printed off the spec from the WJEC and seem to have nothing in my notes from school on this, and i can't seem to find an answer to it in the textboox we have =/


    SPEC - " Compare the behaviour of rubber and polyethylene in terms of molecular structure and behaviour under stress with reference to also to the effeect of temperature. Understand the importance of hysteresis in rubber. "


    Now i understand the weird rubber stress/strain graph and the hysteresis loop. But in terms of temperature all i know is that thermosetting polymers turn brittle under heat and thermoplastics can be remoulded (porbably nothing to do with this...)

    But in terms of molecular structure i haveno idea, i don't take chemsitry and was uselss at GCSE so any lamenst terms would be appreciated!

    Sorry to be a pain, but it's worryin me quite a bit lol :L
    As far as I know you can access these:

    http://www.doitpoms.ac.uk/tlplib/index.php

    Rubbers are a form of polymer (not a plastic), so perhaps all they want you to appreciate the similar long chain structure? It is quite strange though because, as you you may know, rubber acts differently under stress and temperature to polymers. Sorry can't really help much more- wikipedia does have a rather good article on it though.
 
 
 
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