Journal
MACROMOLECULAR BIOSCIENCE
Volume 8, Issue 8, Pages 775-784Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/mabi.200800011
Keywords
chain mobility; crystallization; enzymatic degradation; poly(epsilon.-caprolactone); star polymers
Funding
- National Science Foundation of China [50573085, 20634050]
- Chinese Academy of Sciences (CAS)
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Star-shaped PCL with one to five arms were synthesized by ROP. They have the same crystal structure as linear PCL, indicating that the central cores are located in amorphous regions. The influence of arm length and number on crystallization and melting behavior were studied by DSC, POM, and through the Avrami equation. A model is proposed to analyze the enzymatic degradation process of star-shaped polymers. The multi-arm structure and the limitation of the central cores on the chain mobility of each arm are considered to be the primary factors influencing the characteristic crystallization and enzymatic degradation behavior of star-shaped PCLs.
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