Effect of replacing hydrogen by deuterium and the associated difference in chain links on the thermodynamic properties of polystyrene over the range 0-350/sup 0/K
Results are presented for studies of deuterium isotope effects on the thermodynamic properties and enthalpy during the polymerization of styrene. Measurements were conducted in an adiabatic vacuum calorimeter. Replacement of hydrogen by deuterium causes an increase in heat capacity of ca 20% when the hydrogen atoms are completely replaced by deuterium. The nature and special features of the temperature dependence of the heat capacity for all the polymers studied are the same. The increase in the heat capacity of the deuteriopolystyrenes compared with normal polystyrene is proportional to the number of deuterium atoms in the isotopic polymers and to temperature. The heat capacity data were used to calculate the entropy and enthalpy.
- Research Organization:
- Gorky State Univ., USSR
- OSTI ID:
- 6942573
- Journal Information:
- Dokl. Phys. Chem. (Engl. Transl.); (United States), Journal Name: Dokl. Phys. Chem. (Engl. Transl.); (United States) Vol. 270:1-3; ISSN DKPCA
- Country of Publication:
- United States
- Language:
- English
Similar Records
Effect of deuterium on polystyrene degradation
Deuterium isotope effect on the compatibility between polystyrene and polybutadiene. Technical report
Related Subjects
400301 -- Organic Chemistry-- Chemical & Physicochemical Properties-- (-1987)
400302* -- Organic Chemistry-- Isotope Effects-- (-1987)
AROMATICS
CALORIMETRY
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
COMPARATIVE EVALUATIONS
DATA
DEUTERIUM
DEUTERIUM COMPOUNDS
ENTHALPY
ENTROPY
EXPERIMENTAL DATA
HYDROCARBONS
HYDROGEN COMPOUNDS
HYDROGEN ISOTOPES
INFORMATION
ISOTOPE EFFECTS
ISOTOPES
LIGHT NUCLEI
LOW TEMPERATURE
MATERIALS
MEDIUM TEMPERATURE
NUCLEI
NUMERICAL DATA
ODD-ODD NUCLEI
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PETROCHEMICALS
PETROLEUM PRODUCTS
PHYSICAL PROPERTIES
PLASTICS
POLYMERIZATION
POLYMERS
POLYOLEFINS
POLYSTYRENE
POLYVINYLS
SPECIFIC HEAT
STABLE ISOTOPES
STYRENE
SYNTHETIC MATERIALS
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
ULTRALOW TEMPERATURE
VERY LOW TEMPERATURE
YIELDS