*3.1. Materials*

Polylactide (PLA) type Ingeo 2003D was purchased from NatureWorks (Minnetonka, MN, USA). The chemicals were purchased from the following sources: Tetraethoxysilane (TEOS) from Unisil (Poland), chlorodimethylsilane, tetramethylammonium hydroxide (TMAH) 25% methanol solution from ABCR, (R)-(+)-limonene, toluene, chloroform-d, Karstedt's catalyst xylene solution from Aldrich, P2O5 from Avantor Performance Materials Poland S.A. Toluene was degassed and dried by distilling it from P2O5 under argon atmosphere.
