Abstract
The grafting of acrylic acid in aqueous solution to polyvinyl chloride fibers has been studied in the presence of ferrous, ferric, and cupric salts. The mutual irradiation technique was adopted using a Co-60 source or a Van de Graaff accelerator. The grafting and homopolymerization were suppressed by the cations. Particularly the grafting was suppressed by the cations in the following order of effectiveness : Cu 2+>Fe 2+>Fe 3+. The rate of grafting (in %/hr) was proportional to the 0.76th power of the dose rate over the range from 8.5 × 10 3 rad/hr to 1.4 × 10 5 rad/hr. The apparent activation energy for the grafting was determined to be 6.1 Kcalmole between 25° and 75°C for the mixture of AAH 2O(CH 2Cl) 2, containing Mohr's salt, 4 × 10 −3 mole/l. The grafted polyvinyl chloride fibers showed considerable improvement in moisture regain, heat shrinkage, and melting properties.
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