THERMODYNAMIC PROPERTIES OF POLY(VINYLIDE NE CHLORIDE) IN THE TEMPERATURE-RANGE 0-470 K

Citation
Bv. Lebedev et al., THERMODYNAMIC PROPERTIES OF POLY(VINYLIDE NE CHLORIDE) IN THE TEMPERATURE-RANGE 0-470 K, Vysokomolekularnye soedinenia. Seria A, 37(11), 1995, pp. 1896-1903
Citations number
28
Categorie Soggetti
Polymer Sciences
ISSN journal
05075475
Volume
37
Issue
11
Year of publication
1995
Pages
1896 - 1903
Database
ISI
SICI code
0507-5475(1995)37:11<1896:TPOPNC>2.0.ZU;2-B
Abstract
The temperature dependence of the heat capacity C-p(0), and the temper atures and enthalpies of physical transitions were studied by adiabati c-vacuum and dynamic calorimetry in poly(vinylidene chloride) obtained by polymerization of vinylidene chloride initiated by a radical initi ator, a mixture of this initiator with triisobutylboron, and a coordin ation-radical initiator in the temperature range from 5 to 470 K. Usin g the experimental data, the thermodynamic functions of the polymer, i ncluding C-p(0), H-0(T)-H-0(0), and S-0(T), G(0)(T)-H-0(0), were calcu lated in the 0 - 450 K interval, the configuration entropy S-c(0) was estimated, and the value of the glass transition temperature T-g(0) wa s refined. In addition, the thermodynamic parameters of polymerization (Delta H-p(0) Delta S-p(0), Delta G(p)(0)) were calculated, the upper limiting temperatures T-lim(0) of the process were evaluated, and the possible thermodynamically equilibrium concentrations of monomer in t he polymer were established.