Biodegradable lactone copolymers. I. Characterization and mechanical behavior of ε-caprolactone and lactide copolymers

M. Hiljanen-Vainio, T. Karjalainen, J. Seppälä*

*Corresponding author for this work

    Research output: Contribution to journalArticleScientificpeer-review

    220 Citations (Scopus)

    Abstract

    Copolymers of ε-caprolactone and L-lactide (ε-CL/L-LA) and ε-caprolactone and DL-lactide (ε-CL/DL-LA) were synthesized with compositions 80/20, 60/40, and 40/60 (wt % in feed). The polymerization temperature was 140°C and Sn(II)octoate was used as a catalyst. The effect of the comonomer ratio on the thermal and mechanical properties of the copolymers was investigated by size-exclusion chromatography (SEC), differential scanning calorimetry (DSC), nuclear magnetic resonance (NMR) spectrometry, and tensile testing. The copolymers differed widely in their physical characteristics, ranging from weak elastomers to tougher thermoplastics according to the ratio of ε-CL and LA in the copolymerization. Poly (L-lactide) (PLLA), poly (DL-lactide) (PDLLA), and poly (ε-caprolactone) (PCL) homopolymers were studied as references. The tensile modulus and tensile strength were much higher for PLLA, PDLLA, and PCL homopolymers than for the copolymers. The maximum strain was very low for PLLA and PDLLA, whereas the copolymers and PCL exhibited large elongation.

    Original languageEnglish
    Pages (from-to)1281-1288
    Number of pages8
    JournalJournal of Applied Polymer Science
    Volume59
    Issue number8
    DOIs
    Publication statusPublished - 22 Feb 1996
    MoE publication typeA1 Journal article-refereed

    Fingerprint

    Dive into the research topics of 'Biodegradable lactone copolymers. I. Characterization and mechanical behavior of ε-caprolactone and lactide copolymers'. Together they form a unique fingerprint.

    Cite this