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The gamma‐ray‐induced crosslinking of polyacrylamide
Author(s) -
Burillo S. Guillermina,
Ogawa Takeshi
Publication year - 1986
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1986.070320233
Subject(s) - polyacrylamide , monomer , polymer , self healing hydrogels , materials science , polymer chemistry , irradiation , chemical engineering , gamma ray , polymer science , composite material , physics , nuclear physics , engineering , astrophysics
The gamma‐ray‐induced crosslinking of polyacrylamide was carried out under various conditions. The molecular weight of the polymer before inrradiation was found to be the most important factor for crosslinking. When polymers have low molecular weights such as 80,000, the intensity of radiation, the external pressure applied, and the water content of the polymer powder became important for crosslinking. Although the polycrylamide hydrogel can be obtained directly by irradiating the monomer, it was obtained more conveniently by the irradiation of monomer—polymer mixtures. The hydrogels obtained by the radiation with a dose of over 50 kgray, absorb water by 1000–1500 wt %.