PREPARATION OF A NEW THERMO-SENSITIVE MATERIAL BY PREIRRADIATION GRAFTING

摘要

In this paper, a new thermo-sensitive material that NIPAAm was grafted onto EVA by preirradiation grafting was obtained, and the effects of reaction condition on grafting reaction were discussed. The experimental results showed that the swelling of the grafted EVA was reversible and the lower critical solution temperature (LCST) of the surface was 32℃. Compared with the poly-NIPAAm gel, the grafted EVA with high mechanical strength behaves with similar thermo-sensitivity and the more swift response to the change of temperature. When acrylic or acrylamide was added to NIPAAm, the LCST of the grafted surface shifts higher with the increase of the grafted component hydrophilicity.