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How can one distinguish between polyethylene-terephthalate and polystyrene during the process of recycling? a. The IR-spectra...

How can one distinguish between polyethylene-terephthalate and polystyrene during the process of recycling?

a. The IR-spectra are different
b. different glass temperatures
c. different crystallinity
d. different polymer density

Choose one answer & give a brief explanation.

A. a and b
B. b and c
C. c and d
D. a and d
Science   Chemistry   
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Answer #1

During the process of recycling the different polymeric substances are segregated by the use of "Resin identification code" In case of this code we group the different polymers according to their physical properties.

Now in order to differentiate between the two different polymers  polyethylene-terephthalate and polystyrene , we have to compare their physical properties.From the given options we can make out is that crystallinity and polymer density are the two physical properties. Hence these can be used to distnguish between the given polymers.

Hence option d is the correct answer

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