Radiation protection of poly(vinyl chloride) by N,N-dialkyl dithiocarbamate substitution. [Gamma rays]
The effect of N,N-dialkyl dithiocarbamate substitution on the radiation stability of poly(vinyl chloride) (PVC) film was studied. PVC containing 6.5-15.7 mole-percent N,N-dimethyl dithiocarbamate (PDE) was irradiated with ..gamma..-rays from a /sup 60/Co source at room temperature under vacuum. The evolved gaseous products were measured and analyzed with a mass spectrometer. The apparent G values for gas evolution of PDM and PDE decreased remarkably. The external protection was studied using polymer-blended films of PVC and PDE or PDM. The stabilization coefficients for internal protection and external protection in polymer blends were calculated. Although the ESR spectrum of the irradiated PDM, PDE, and PVDE which is synthesized by polymerization of S-vinyl-N,N-diethyl dithiocarbamate (VDE) showed the same sulfur radicals, they were different from those of the irradiated cysteamine hydrochloride and PVC containing N-methyl dithiocarbamate (PMD). From these results, the protection of a polymer by a covalently bound dithiocarbamate was discussed.
- Research Organization:
- Industrial Products Research Inst., Tokyo
- OSTI ID:
- 7282975
- Journal Information:
- J. Appl. Polym. Sci.; (United States), Vol. 20:3
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
PVC
RADIOLYSIS
CARBAMATES
CHEMICAL REACTION KINETICS
ELECTRON SPIN RESONANCE
G VALUE
GAMMA RADIATION
INFRARED SPECTRA
MASS SPECTRA
ORGANIC NITROGEN COMPOUNDS
ORGANIC SULFUR COMPOUNDS
STABILIZATION
CARBONIC ACID DERIVATIVES
CARBOXYLIC ACID SALTS
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTIONS
CHEMISTRY
CHLORINATED ALIPHATIC HYDROCARBONS
DECOMPOSITION
ELECTROMAGNETIC RADIATION
HALOGENATED ALIPHATIC HYDROCARBONS
IONIZING RADIATIONS
KINETICS
MAGNETIC RESONANCE
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC POLYMERS
POLYMERS
POLYVINYLS
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
REACTION KINETICS
RESONANCE
SPECTRA
400600* - Radiation Chemistry