ESR studies of the radiation-induced multiple graft polymerization. [Electrons]

Journal Article · Mon Aug 01 04:00:00 EDT 1977 · J. Polym. Sci., Polym. Chem. Ed.; (United States)

DOI:https://doi.org/10.1002/pol.1977.170150805· OSTI ID:5376894

Omichi, H; Araki, K

The radiation-induced multiple-graft polymerization was studied by an ESR method. When methyl methacrylate vapor was introduced onto preirradiated polyethylene already grafted with styrene, the second step of grafting of methyl methacrylate occurred mainly in the polyethylene portion. The kinetic treatment proved that the termination rate constant k/sub t/ of methyl methacrylate decreased with the amount of styrene grafted in advance. On the other hand, when styrene vapor was introduced onto polyethylene grafted with methyl methacrylate, only radicals of poly(methyl methacrylate) decreased. In this case, the second step of grafting of styrene occurred in the poly(methyl methacrylate) portion which covered the whole surface of the polyethylene powder. When monomer vapors were alternately introduced onto preirradiated polyethylene powder, the second step of grafting occurred at the growing chain end of the first monomer.

• Research Organization: Japan Atomic Energy Research Inst., Takasaki
• OSTI ID: 5376894
• Journal Information: J. Polym. Sci., Polym. Chem. Ed.; (United States), Journal Name: J. Polym. Sci., Polym. Chem. Ed.; (United States) Vol. 15:8; ISSN JPLCA
• Country of Publication: United States
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
400600* -- Radiation Chemistry
AROMATICS
BEAMS
CARBOXYLIC ACID ESTERS
CHEMICAL RADIATION EFFECTS
CHEMISTRY
ELECTRON BEAMS
ELECTRON SPIN RESONANCE
ESTERS
GRAFT POLYMERS
HYDROCARBONS
LEPTON BEAMS
MAGNETIC RESONANCE
METHACRYLIC ACID ESTERS
METHYL METHACRYLATE
ORGANIC COMPOUNDS
ORGANIC POLYMERS
PARTICLE BEAMS
POLYETHYLENES
POLYMERS
POLYOLEFINS
RADIATION CHEMISTRY
RADIATION EFFECTS
RESONANCE
STYRENE