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Topic: Elastomer, Thermoplastic or Thermosetting Plastic?  (Read 7284 times)

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Offline tone999

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Elastomer, Thermoplastic or Thermosetting Plastic?
« on: August 06, 2009, 10:10:13 AM »
At room temperature, classify the following materials as elastomers, T/P, or T/S polymers.

(i) A lightly cross-linked copolymer with Tg  = -45c
(ii) A branched polypropylene of Tg = -8c
(iii) Epoxy resin matrix in advanced composites.

Im lost here. Any help would be great to help me understand this
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Offline typhoon2028

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Re: Elastomer, Thermoplastic or Thermosetting Plastic?
« Reply #1 on: August 06, 2009, 10:40:21 AM »
You should tell the forum some information about each material.  You have to make an attempt before getting the answer.
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Offline tone999

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Re: Elastomer, Thermoplastic or Thermosetting Plastic?
« Reply #2 on: August 09, 2009, 02:43:13 PM »
(i) will be rubbery, being above Tg, TS
(ii) will also be rubbery, but TP
(iii) TS


Any thoughts?
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Offline marquis

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Re: Elastomer, Thermoplastic or Thermosetting Plastic?
« Reply #3 on: August 09, 2009, 04:56:47 PM »
I would retry i.  It appears to have the characteristics of an elastomer.  And while you could call elastomers thermoset (vulcanized is usually the word), I don't think that is what your professor is after.
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