Abstract: Bingyao Deng and co-workers prepared biodegradable organic-inorganic polymer hybrids based on poly(ε-caprolactone) and polyhedral oligomeric silsesquioxane via open-ring polymerization. Both segments crystallized into two well-separated phases. Hybrids with high polyhedral oligomeric silsesquioxane content formed snowflake-shaped crystals, while those with low polyhedral oligomeric silsesquioxane content formed classic spherulites. (DOI: 10.1002/app.44113)