ABSTRACT
Plastics are heterogeneous materials. They may contain impurities such as residual oligomers, monomers, reagents, and products of side reactions. They may also contain compounds included intentionally such as plasticizers, fillers, pigments, mold release agents, and starch added to enhance degradability. These must be borne in mind when selecting suitable organisms or sources of inocula to test their resistance or susceptibility to attack.
