THE ACCELERATING EFFECT OF ADDITIVES ON RADIATION-INDUCED GRAFT POLYMERIZATION. Annual Report

Technical Report · Tue Jan 31 23:00:00 EST 1961

OSTI ID:4820540

Odian, G; Sobel, M; Klein, R; Acker, T

Two broad areas of radiation-induced graft polymerization were investigated during the past year. A study was made of the effects of various solvents on the process of radiation-induced graft polymerization. It was found that the use of the proper solvent has a pronounced accelerative effect on the grafting rate. Methanol accelerates the radiation-induced grafting of styrene to low density polyethylene, hnngh density polyethylene, polypropylene, polyvinyl chloride and nylon. Miethanol also accelerates the radiation-nnnduced grafting of methyl acrylate to nylon, polypropylene, and high density polyethylene. Hexane accelerates the radiation-induced grafting of t-butylaminoethyl methacrylate to low density polyethylene. Mechanisms which appear to be responsible for acceleratnnve effects include the Trommsdorff effect of the solvents, and the swelling effect of certain solvents on various polymers. The former mechanism is responsible for the effects observed in the cases of polyethylene, polypropylene, polyvinyl chloride and Teflon in the graft polymcrization of styrene, methyl acrylate, and t-butylaminoethyl methacrylate. The latter mechanism is responsible for the effects observed in the grafting of styrene and methyl acrylate to nylon. Radiation-induced grafting via the technique of irradiation of resin-monomer mixtures was also investigated. Monomer and polymer were mixed above the melt point of the latter and some of the properties of the irradiated blends examined. It was found that irradiated polyethylene-vinyl stearate mnnxtures showed increased plasticization, and irradiated blends of polyethylene with diallyl phosphite and triallyl phosphate show improved temperature stabnnlity. (auth)

• Research Organization: Radiation Applications Inc., Long Island City, N.Y.
• NSA Number: NSA-16-006437
• OSTI ID: 4820540
• Report Number(s): NYO-2530
• Country of Publication: United States
• Language: English

Related Subjects

ACRYLIC ACID
AMIDES
CHEMICAL REACTIONS
CHEMISTRY
CHLORIDES
COMPOUNDS
EXPANSION
IRRADIATION
MELTING POINTS
METHYL RADICALS
MIXING
NYLON
ORGANIC ACIDS
ORGANIC FLUORINE COMPOUNDS
PHOSPHATES
POLYETHYLENES
POLYMERIZATION
POLYMERS
POLYVINYLS
PROPYL RADICALS
PROPYLENE
REACTION KINETICS
RESINS
SOLVENTS
STABILITY
STEARIC ACID
STYRENE
SWELLING
TEFLON
TEMPERATURE
TROMMSDORFF EFFECT
VELOCITY
VINYL RADICALS