Keggin-Type Heteropolyacid for Ring-Opening Polymerization of Cyclohexene Oxide: Molecular Weight Control

Figure 4

Yield and Mw of PCHO as a function of reaction temperature. Polymerization catalyzed by 0.2 g of H₃PW₁₂O₄₀ during 3 hours in CH₂Cl₂.