“…6 Factors affecting biodegradation (Kijchavengkul and Auras 2008) polymers, such as polycaprolactone (Toncheva et al 1996;Jun et al 1994), are also depolymerized by microbial enzymes, after which the monomers are absorbed into microbial cells and biodegraded (Goldberg 1995). Abiotic hydrolysis is the most important reaction for initiating the environmental degradation of synthetic polymers (Gopferich 1998) like polycarboxylates (Winursito and Matsumura, 1996), poly(ethylene terephthalate) (Heidary and Gordon 1994), polylactic acid and their copolymers (Hiltunen et al 1997;Nakayama et al 1996), poly (α-glutamic acids) (Fan et al 1996), and polydimethylsiloxanes, or silicones (Xu et al 1998).…”