R limonene

Isotactic polypropylene (iPP), Moplen HP456J grade, was purchased from BasellOrlen Polyolefins (Poland). The chemicals were purchased from the following sources: Tetraethoxysilane (TEOS), chlorodimethylsilane, chlorodimethylvinylsilane, isobutyltrimethoxysilane, tetramethylammonium hydroxide (TMAH) 25% methanol solution from ABCR, (R)-(+)-limonene, allyl-glycidyl ether, toluene, chloroform-d, Karstedt’s catalyst xylene solution from Aldrich, P₂O₅ from Avantor Performance Materials Poland S.A. (Gliwice, Poland). Toluene was degassed and dried by distilling it from P₂O₅ under argon atmosphere. Silsesquioxane and spherosilicate compounds were prepared according to literature reports provided in Table 1.

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.

Polylactide (PLA) Ingeo 2003D type was purchased from NatureWorks (Minnetonka, MN, USA). TiO₂ was obtained from Grupa Azoty Z.Ch. “Police” S.A. (Police, Poland), as a 50% w/w water slurry with no additives. The chemicals were purchased from the following sources: tetraethoxysilane (TEOS), vinyltrimethoxysilane (VTMOS) from Unisil (Tarnów, Poland), chlorodimethylsilane, tetramethylammonium hydroxide (TMAH) 25% methanol solution from ABCR, (R)-(+)-limonene, 1-octadecene, toluene, D-chloroform and Karstedt’s catalyst xylene solution from Merck Life Science Sp.z.o.o (Darmstadt, Germany), P₂O₅ from Avantor Performance Materials Poland S.A. (Gliwice, Poland) toluene was degassed and dried by distilling it from P₂O₅ under an argon atmosphere.