The following temperature behaviour of the Young modulus (E) is shown for an amorphous polymer: Does the location of BC (on temperature scale) depends on the polymer? Question 5Select one or more: a. yes, it depends on the glass transition temperature b. yes, it depends on the melting point of the polymer c. no, because every polymer becomes soft (lower E) at higher temperatures d. no, it is a universal temperature
Question
The following temperature behaviour of the Young modulus (E) is shown for an amorphous polymer:
Does the location of BC (on temperature scale) depends on the polymer?
Question 5Select one or more:
a. yes, it depends on the glass transition temperature
b. yes, it depends on the melting point of the polymer
c. no, because every polymer becomes soft (lower E) at higher temperatures
d. no, it is a universal temperature
Solution
The location of BC on the temperature scale does indeed depend on the polymer. More specifically, it depends on the glass transition temperature of the polymer. This is the temperature at which the polymer transitions from a hard, glassy material to a soft, rubbery material. Therefore, the correct answer is:
a. yes, it depends on the glass transition temperature
The melting point of the polymer (option b) is not relevant to the location of BC. While it's true that every polymer becomes softer at higher temperatures (option c), this does not mean that the specific location of BC is the same for all polymers. Finally, there is no universal temperature for BC (option d), as it depends on the specific properties of each polymer.
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