A new polymer has been synthsized in your laboratory, and you are proudly discus

Question

A new polymer has been synthsized in your laboratory, and you are proudly discussing the first property sutudies when your boss walks in. "We need a polymer with a cubic coefficient of thermal expansion of less than 4x10-4 deg-1 at 50oC. Can we consider your new stuff?"

Your technician hands you the sheet of paper with available data:

Tg = 100oC

aR= 5.5x10-4 deg-1 at 150oC

Your boss adds, "By the way, hte Board meets in 30 minutes. Any answer by then would surely be valuable." You begin to tear your hair out by its roots, wondering how you can solve this one so fast without going back into the lab, since there really isn't much time.

Explanation / Answer

Answer:

Thermal coefficient is a factor which represents the effective change in polymer by changing temperature, the thermal expansion are high at high melting point and vice versa. Therefore, it is convenient and beneficial to consider the polymer which have high thermal expansion at high melting point. So it is depend upon the purpose of use.

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