Question

A polymer shows a glass transition temperature (Tg) of 100°C. If modified with nanofillers, Tg increases by 15%. What is the new Tg?

• A. 110°C
• B. 115°C
• C. 120°C
• D. 130°C

Hint:

When dealing with percentage increases, multiply the original value by the percentage (in decimal form), then add it to the original value. In this case, 15% of 100°C was added to the original Tg.

Answer 1

The Correct Option is B

The glass transition temperature (Tg) of a polymer is the temperature at which the polymer transitions from a hard, glassy material to a soft, rubbery material. In this case, we are told that the initial Tg of the polymer is 100°C. When the polymer is modified with nanofillers, the Tg increases by 15%.
To calculate the new Tg, we use the following formula to find a 15% increase in Tg: \[ {New Tg} = {Original Tg} + 15% { of Original Tg} \] \[ {New Tg} = 100°C + 0.15 \times 100°C = 100°C + 15°C = 115°C \] Thus, the new Tg after modification with nanofillers is 115°C.
This is a simple percentage increase problem where we apply the given percentage change to the original value.