Yp. Khanna et al., RELIABLE MEASUREMENTS OF THE NYLON-6 GLASS-TRANSITION MADE POSSIBLE BY THE NEW DYNAMIC DSC, Macromolecules, 28(8), 1995, pp. 2644-2646
Although it has long been known that the glass transition temperature
(T-g) of nylons changes significantly with moisture content, literatur
e to date has lacked reliable measurements of this type, primarily due
to the changes in moisture during the T-g scanning experiments. Intro
duction of the new dynamic DSC technique has allowed us to quantify th
e dependence of T-g on % relative humidity for nylon 6 and nylon 66. B
y eliminating the possibility of moisture pickup, we have been able to
separate the effect of crystallinity as well as orientation on the T-
g of nylon 6. The methodology described here should be applicable to o
ther moisture sensitive polymers as well, e.g., poly(vinyl alcohol).