Premium
Thermodynamic analysis of the inequality of the cohesive energy density and internal pressure of polymers
Author(s) -
Rane Sagar S.,
Choi Phillip
Publication year - 2005
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.20339
Subject(s) - internal energy , cohesion (chemistry) , internal pressure , thermodynamics , materials science , polymer , energy density , statistical physics , theoretical physics , chemistry , physics , composite material , organic chemistry
With a simple thermodynamic analysis, we show that polymers do not satisfy the two major criteria that are required for establishing a unique relationship between cohesion energy density (CED) and internal pressure (IP). Since IP can take values independently of CED, we contend that the IP/CED ratio cannot be established a priori, as the ratio depends on the thermodynamic variables (temperature, pressure, etc.) and the system of interest. POLYM. ENG. SCI. 45:798–800, 2005. © 2005 Society of Plastics Engineers