Abstract
Influence of solid surface on the addition polymerization of two amphiphilic compounds containing different functional groups (C=C or C≡C-C≡C) nearby polar head groups has been studied. In the addition polymerization, a solid surface seems to effect on both of initiation and propagation reactions, or on either one, and hence acceleration or suppression of the polymerization should be caused. In this study, mechanisms for suppression of polymerization of N-octadecyl acrylamide (ODAAm) and heptadeca-2, 4-diynoic acide (HD-2, 4-DA) by the surface effect of aluminium pan were examined comparing their γ-ray irradiation postpolymerization with the thermal polymerization in micro DSC measurements. In the polymerization of ODAAm, it was found that the initiation reaction was predominantly suppressed by the surface effect, because this monomer polymerized easily when free radicals had been generated previouly by γ-ray irradiation. The initiation reaction of HD-2, 4-DA also seems to be affected by anchoring of COOH groups on the aluminium surface.
