| Autor: |
Michael J. Drews, Dahlia Haynes, Amit K. Naskar, Dennis W. Smith, Akhilesh K. Singh |
| Rok vydání: |
2010 |
| Předmět: |
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| Zdroj: |
Polymer International. 60:507-516 |
| ISSN: |
0959-8103 |
| DOI: |
10.1002/pi.2982 |
| Popis: |
Laboratory-scale synthesis and morphological and surface energy characterization of triblock A–B–A copolymers based on poly(lactic acid) (PLA; A segment) containing various block lengths of perfluoropolyether (PFPE; B segment) at 5 wt% PFPE content are reported. Incorporation of PFPE segments in PLA lowers significantly both the polar and dispersive components of total surface energy. Total surface energy is lowered from ca 35 to ca 17 mN m−1 on copolymerization of PLA with 5 wt% PFPE. Thermal analysis data reveal that lower molecular weight PFPE segments lower significantly the glass transition, crystallization and melting temperatures of the PLA matrix. Although block length variation of the PFPE segment does not affect surface energies of copolymer films, smaller PFPE segments increase significantly the low-temperature modulus as observed from dynamic mechanical analysis. Copyright © 2010 Society of Chemical Industry |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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