Abstract
Abstract Diffusion and migration of small molecules in polymers affect the long-term properties of the materials and also the surrounding environments. The interaction of such small molecules (i.e., low molecular weight compounds) with the environment are one of the main factors governing in-vitro and in-vivo behavior of degradable polymers. The type and amount of formed degradation products are the crucial points deciding the applicability of degradable polymers. The number of low molecular weight compounds obtained during long-term use of degradable polymers depends on the polymeric chain. Hydrolyzable polymers like the polyesters give few degradation products (mainly the monomer) where it is possible to relate the amount of products formed with the weight loss and the molecular weight changes. On the other hand, nonhydrolyzable polymers like polyethylene form hundreds of products in different amounts, thus complicating this comparison. Degradation products of hydrolyzable polyesters (PHB, PLLA, PDLLA/P...
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