Context: 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 temperatureb.yes, it depends on the melting point of the polymerc.no, because every polymer becomes soft (lower E) at higher temperaturesd.no, it is a universal temperature 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
Context: 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 temperatureb.yes, it depends on the melting point of the polymerc.no, because every polymer becomes soft (lower E) at higher temperaturesd.no, it is a universal temperature
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 (option a). The glass transition temperature is the temperature at which the polymer transitions from a hard, glassy material to a soft, rubbery material. This transition affects the Young's modulus of the polymer, which is a measure of its stiffness. Therefore, the location of BC on the temperature scale can vary for different polymers, depending on their specific glass transition temperatures.
Option b is not necessarily correct because the melting point of the polymer does not directly affect the Young's modulus.
Options c and d are incorrect because the temperature at which a polymer becomes softer (lower E) can vary depending on the specific polymer, and it is not a universal temperature.
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