Polymer stabilizers. A survey with reference to possible applications in the conservation field

A survey of the most common classes of polymer stabilizers is presented. Topics which are discussed include: chemical composition, inhibition mechanisms, areas of application, synergism, compatibility of additives and substrates, and evaluation of the performance of stabilizers. Hindered amine light stabilizers and benzotriazole and benzophenone type ultraviolet absorbers are particularly recommended for conservation materials. In order to prevent physical loss of additives by volatilization or exudation, high molecular weight stabilizers which are chemically compatible with the substrate should be used. Before using additives in conservation materials they should be scrutinized for negative side effects in properly designed accelerated aging tests.