TY - JOUR
T1 - The melting behavior of trinitrotoluene nanoconfined in controlled poreglasses
AU - Di, Xiaojun
AU - Xu, Ben
AU - McKenna, Gregory
N1 - Funding Information:
Acknowledgments The authors are grateful to the Office of Naval Research under Project No. N00014-11-1-0424 and the John R. Bradford endowment at Texas Tech University, each for partial support of this work.
PY - 2013/8
Y1 - 2013/8
N2 - The depression of the melting temperature and heat of fusion of
trinitrotoluene (TNT) confined in the nanoscale pores of controlled pore
glasses (CPG) were studied by differential scanning calorimetry. 8, 12,
16, 35, and 70 nm pore size CPG were used in the experiment. Both the
melting temperature and the heat of fusion of confined nanocrystals
decreased with decreasing pore size, which is consistent with previous
studies on other materials. When plotting the melting temperature
depression as a function of reciprocal pore diameter, an excellent
linear fit could be applied to the experimental data points. From the
slope of this linear fit, the solid-liquid interface energy of TNT was
calculated according to the Gibbs-Thomson equation and found equal to
22.1 +/- A 0.4 mJ m(-2). This is in reasonable agreement with the values
calculated from the empirical Turnbull equation and the liquid layer
model.
AB - The depression of the melting temperature and heat of fusion of
trinitrotoluene (TNT) confined in the nanoscale pores of controlled pore
glasses (CPG) were studied by differential scanning calorimetry. 8, 12,
16, 35, and 70 nm pore size CPG were used in the experiment. Both the
melting temperature and the heat of fusion of confined nanocrystals
decreased with decreasing pore size, which is consistent with previous
studies on other materials. When plotting the melting temperature
depression as a function of reciprocal pore diameter, an excellent
linear fit could be applied to the experimental data points. From the
slope of this linear fit, the solid-liquid interface energy of TNT was
calculated according to the Gibbs-Thomson equation and found equal to
22.1 +/- A 0.4 mJ m(-2). This is in reasonable agreement with the values
calculated from the empirical Turnbull equation and the liquid layer
model.
KW - Energetic material
KW - Melting thermodynamics
KW - Nanocrystals
KW - TNT
UR - http://www.scopus.com/inward/record.url?scp=84880513006&partnerID=8YFLogxK
U2 - 10.1007/s10973-013-3196-y
DO - 10.1007/s10973-013-3196-y
M3 - Article
SN - 1388-6150
VL - 113
SP - 533
EP - 537
JO - Journal of Thermal Analysis and Calorimetry
JF - Journal of Thermal Analysis and Calorimetry
IS - 2
ER -