Stabilization of gamma-irradiated poly(vinyl chloride) by epoxy compounds. I. Radiation yield of hydrogen chloride and changes of epoxy group concentration in gamma-irradiated PVC-stabilizer mixtures

Journal Article · Sat Jan 01 04:00:00 EST 1983 · J. Appl. Polym. Sci.; (United States)

DOI:https://doi.org/10.1002/app.1983.070280206· OSTI ID:6107441

Lerke, G; Lerke, I; Szymanski, W

The G/sub HCl/ values of ..gamma..-irradiated PVC mixtures and the changes of the epoxy group concentration were studied after addition of various amounts of five epoxy stabilizers: diglycidyl ether of 2,2-bis(4-hydroxy-3-methyl phenyl) propane (I), diglycidyl ether of 2,2-bis(4-hydroxy-3-nitrophenyl)-propane (II), styrene oxide (1,2-epoxy ethyl benzene) (IV), epoxidized ricinus oil (VI), and epoxidized soybean oil (Drapex 6.8) (VII). It is stated that only about 50% of epoxy groups, declining in the system, take part in binding of HCl; the rest of these groups disappear as a consequence of other reactions. In connection with the data of the previous paper, the results presented indicate that the process of stabilization goes in two stages. In the first stage the process consists of the HC1 capture by the epoxy groups; in the second stage, due to the remaining part of the stabilizer molecule, a protective effect occurs. This effect consists, for the stabilizers I, II, IV, of gaining the energy by the benzene ring and, for the stabilizers VI, VII, of a mechanical drawing of polymer chains, wich makes the energy transfer more difficult. Having the greatest content of epoxy oxygen (about 10%), the styrene oxide (IV) stabilizes best.

• Research Organization: Nicholas Copernicus Univ., Torun, Poland
• OSTI ID: 6107441
• Journal Information: J. Appl. Polym. Sci.; (United States), Journal Name: J. Appl. Polym. Sci.; (United States) Vol. 28:2; ISSN JAPNA
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400600* -- Radiation Chemistry
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTION YIELD
CHEMISTRY
CHLORINATED ALIPHATIC HYDROCARBONS
ELECTROMAGNETIC RADIATION
EPOXIDES
GAMMA RADIATION
HALOGENATED ALIPHATIC HYDROCARBONS
HYDROCHLORIC ACID
HYDROGEN COMPOUNDS
INORGANIC ACIDS
IONIZING RADIATIONS
KINETICS
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC OXYGEN COMPOUNDS
ORGANIC POLYMERS
POLYMERS
POLYVINYLS
PVC
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
REACTION KINETICS
STABILIZATION
YIELDS