Process for the preparation of graft copolymers using repetitive irradiation and contacting steps
Abstract
Abstract A PROCESS FOR PREPARING A GRAFT COPOLYMER BETWEEN A MONOMER POLYMERIZABLE BY FREE RADICAL INITIATION AND A POLYMER SUBSTRATE WHEREIN THE SOLUBILITY OF THE MONOMER IN THE SUBSTRATE IS LESS THAN ABOUT 10%. THE PROCESS INCLUDES THE STEPS: (1) IRRADIATING THE SUBSTRATE WHILE FREE FROM EXCESS SURFACE MONOMER TO A SPECIFIED FREE-RADICAL CONCENTRATION RANGE AND PRIOR TO THE DECAY BELOW A SPECIFIED LIMIT, (2) CONTACTING THE MONOMER WITH THE IRRADIATED SUBSTRATE AND (3) REMOVING THE EXCESS MONOMER FROM THE SUBSTRATE SURFACE AND, PREFERABLY, A REPETITION THEREOF. THE PROCESS, BY PROVIDING FOR CONCURRENT AND POST-IRRADIATION GRAFTING, RESULTS IN AN INCREASED AMOUNT AND GREATER UNIFORMITY OF GRAFTING.
Inventors
- 👤 Joseph Zimmerman
Bibliographic Details
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