Crystallization Behavior and Dynamic Mechanical Properties of Poly(ε-caprolactone)/Octaisobutyl-Polyhedral Oligomeric Silsesquioxanes Composites Prepared via Different Methods
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Two octaisobutyl-polyhedral oligomeric silsesquioxanes (oib-POSS) reinforced biodegradable poly(ε-caprolactone) (PCL) composites were prepared via two different methods, i.e., melt compounding and solution casting, which were named as mPCL/oib-POSS and sPCL/oib-POSS, respectively, in this work. Oib-POSS dispersed finely in both composites; moreover, oib-POSS aggregates were larger in mPCL/oib-POSS than in sPCL/oib-POSS. Despite the different preparation methods, oib-POSS obviously promoted the crystallization of PCL, especially in sPCL/oib-POSS, but did not modify the crystal structure of PCL. The storage moduli of PCL were improved significantly in both composites. PCL/oib-POSS composites with enhanced crystallization behavior and improved dynamic mechanical properties were successfully prepared through both methods; moreover, the solution casting method was more effective than the melt compounding method.
KeywordsPoly(ε-caprolactone) POSS Crystallization
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Part of this research was financially supported by the National Natural Science Foundation of China (Nos. 51373020 and 51573016).
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