GRAFT POLYMERIZATION ON NYLON 6 (in Japanese)
Radiation grafting of nylon 6 with vinyl monomers such as vinyl acetate, styrene, methyl acrylate, methyl methacrylate, and acrylamide using the preirradation method is reported. Some results on polymerization behavior, propenties of the graft copolymer, and estimation of the length of grafted branches, were obtained. Preirradiation was performed in air at room temperature using gamma rays emitted from a 315C Co/sup 60/ source of 1.04 x 10/sup 4/ rep/ hr. The graft polymerization was carried out in a vacuum at 100 deg C without any solvents. Crystallinity of the graft copolymers was examined. In the case of vinyl acetate grafting it was found that nylon 6 is decrystallized with an increasing degree of grafting. The phenomena may be related to the melting point, Tg, and miscibility of both polymers. The transparency of various grafted films was also examined. Poly(vinyl acetate) was the most transparent, and polystyrene the least. By acid hydrolysis of the grait copolymer with HCl, the trunk of nylon 6 degraded thoroughly into low molecular compounds. The branches remained alone in the case of polystyrene, and measurement of its solution viscosity in toluene gave the molecular weight of grafted branches. As the irradiation dose increases, the length of branches decreases. As the percent grafting increases, the length and the number of branches also increase. By adding some chain transfer agents into the polymerizing system and elevating the temperature, the molecular weight of branches could be lowered over a wide range. (P.C.H.)
- Research Organization:
- Nippon Rayon Co., Ltd.
- NSA Number:
- NSA-17-030200
- OSTI ID:
- 4680652
- Journal Information:
- Proc. Japan Conf. Radioisotopes, Journal Name: Proc. Japan Conf. Radioisotopes Vol. Vol: 5th, No. 4
- Country of Publication:
- Country unknown/Code not available
- Language:
- Japanese
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Related Subjects
ACRYLIC ACID
AIR
AMIDES
CHEMICALS
COBALT 60
CRYSTALS
GAMMA RADIATION
GENERAL AND MISCELLANEOUS
HEATING
HYDROCHLORIC ACID
HYDROLYSIS
IRRADIATION
MEASURED VALUES
MELTING
METHYL RADICALS
MOLECULES
NYLON
POLYMERIZATION
POLYMERS
POLYSTYRENE
RADIATION DOSES
SOLUTIONS
STYRENE
TOLUENE
VACUUM
VINYL RADICALS
VISCOSITY
WEIGHT