|
|
|
|
|
|
|
|
n |
Free volume:
“internal space” available
|
|
in the polymer
for the chains to move.
|
|
|
n |
This volume
increases sharply at the
|
|
|
glass transition
temperature, Tg.
|
|
|
n |
Plasticizer is
meant to decrease the
|
|
|
glass transition
temperature, imparting
|
|
|
increased
flexibility to polymer at room
|
|
|
temperature.
|
|