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Thermal properties of poly(vinyl cyclohexane)
Author(s) -
Grebowicz J. S.
Publication year - 1992
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.760321708
Subject(s) - crystallinity , cyclohexane , materials science , amorphous solid , tacticity , enthalpy of fusion , glass transition , melting point , polymer , fusion , phase (matter) , polymer chemistry , crystallography , composite material , organic chemistry , chemistry , polymerization , linguistics , philosophy
Isotactic poly(vinyl cyclohexane) (PVCH) was studied by thermal analysis. The deduced equilibrium melting point, T m ° , is 405°C (678 K). The heat of fusion, Δ H ƒ °was found to be 50.82 J/g (5.60 kJ/mol) and Δ C p at T g , is 0.273 J/(gK) [30.1 J/(molK)]. The glass transition temperature, T g , of the amorphous PVCH is 80°C (353 K). In semicrystalline samples, T g increases up to 165°C (438 K) for crystallinities > 40%. Beside crystalline and flexible amorphous, a rigid amorphous phase is postulated in the semicrystalline polymer.