Subject:
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Re: attn: chemists
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Newsgroups:
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lugnet.fun, lugnet.general
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Date:
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Thu, 6 Mar 2003 20:23:38 GMT
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Viewed:
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3290 times
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In lugnet.fun, Lars Gjerløw Jørgensen writes:
> search google for "lego material plastic carbon"
> lots of results.. but this one:
>
> http://www.designinsite.dk/htmsider/m0007.htm
Also on that site they have the ratio of the three components:
" ABS is an amorphous thermoplastic blend. The recipe is 15-35% acrylnitrile,
5-30% butadiene and 40-60% styrene. Depending on the blend different properties
can be achieved."
As to the original question, it's hard to talk about the molecular weight of a
polymer. A polymer is a chain made by taking a large number of small building
blocks and treating them with conditions (heat, light, intiators, catalysts,
depending on the system) that promote the formation of covalent bonds between
the individual links. So you get these molecules that are long chains, but
they are of varying lengths. Some chains might be 1000 links long, others
10,000. This is called "polydispersity". Often the ultimate goal would be to
make a "monodisperse" polymer (one in which all of the chains are the same
length), but this is hard. Anyway, if we don't know the chain lengths (or the
average chain length) we can't calculate a molecular weight.
Bruce
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Message is in Reply To:
 | | Re: attn: chemists
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| "Nick Oranzi" <cheez11111@yahoo.com> mumbled in news:HB9B36.C7q@lugnet.com: (...) well that's an interesting question.. let's see.. search google for "lego material plastic carbon" lots of results.. but this one: (URL) us that the material is in (...) (22 years ago, 5-Mar-03, to lugnet.fun, lugnet.general)
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