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Krtouš Z, Hanyková L, Krakovský I, Nikitin D, Pleskunov P, Kylián O, Sedlaříková J, Kousal J. Structure of Plasma (re)Polymerized Polylactic Acid Films Fabricated by Plasma-Assisted Vapour Thermal Deposition. MATERIALS (BASEL, SWITZERLAND) 2021; 14:459. [PMID: 33477840 PMCID: PMC7832887 DOI: 10.3390/ma14020459] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 01/12/2021] [Accepted: 01/14/2021] [Indexed: 12/02/2022]
Abstract
Plasma polymer films typically consist of very short fragments of the precursor molecules. That rather limits the applicability of most plasma polymerisation/plasma-enhanced chemical vapour deposition (PECVD) processes in cases where retention of longer molecular structures is desirable. Plasma-assisted vapour thermal deposition (PAVTD) circumvents this limitation by using a classical bulk polymer as a high molecular weight "precursor". As a model polymer in this study, polylactic acid (PLA) has been used. The resulting PLA-like films were characterised mostly by X-ray photoelectron spectroscopy (XPS) and nuclear magnetic resonance (NMR) spectroscopy. The molecular structure of the films was found to be tunable in a broad range: from the structures very similar to bulk PLA polymer to structures that are more typical for films prepared using PECVD. In all cases, PLA-like groups are at least partially preserved. A simplified model of the PAVTD process chemistry was proposed and found to describe well the observed composition of the films. The structure of the PLA-like films demonstrates the ability of plasma-assisted vapour thermal deposition to bridge the typical gap between the classical and plasma polymers.
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Affiliation(s)
- Zdeněk Krtouš
- Faculty of Mathematics and Physics, Charles University, V Holešovickách 2, 180 00 Prague, Czech Republic; (Z.K.); (L.H.); (I.K.); (D.N.); (P.P.); (O.K.)
| | - Lenka Hanyková
- Faculty of Mathematics and Physics, Charles University, V Holešovickách 2, 180 00 Prague, Czech Republic; (Z.K.); (L.H.); (I.K.); (D.N.); (P.P.); (O.K.)
| | - Ivan Krakovský
- Faculty of Mathematics and Physics, Charles University, V Holešovickách 2, 180 00 Prague, Czech Republic; (Z.K.); (L.H.); (I.K.); (D.N.); (P.P.); (O.K.)
| | - Daniil Nikitin
- Faculty of Mathematics and Physics, Charles University, V Holešovickách 2, 180 00 Prague, Czech Republic; (Z.K.); (L.H.); (I.K.); (D.N.); (P.P.); (O.K.)
| | - Pavel Pleskunov
- Faculty of Mathematics and Physics, Charles University, V Holešovickách 2, 180 00 Prague, Czech Republic; (Z.K.); (L.H.); (I.K.); (D.N.); (P.P.); (O.K.)
| | - Ondřej Kylián
- Faculty of Mathematics and Physics, Charles University, V Holešovickách 2, 180 00 Prague, Czech Republic; (Z.K.); (L.H.); (I.K.); (D.N.); (P.P.); (O.K.)
| | - Jana Sedlaříková
- Faculty of Technology, Tomas Bata University in Zlín, Vavrečkova 275, 76001 Zlín, Czech Republic;
- Centre of Polymer Systems, Tomas Bata University in Zlín, Třída Tomáše Bati 5678, 76001 Zlín, Czech Republic
| | - Jaroslav Kousal
- Faculty of Mathematics and Physics, Charles University, V Holešovickách 2, 180 00 Prague, Czech Republic; (Z.K.); (L.H.); (I.K.); (D.N.); (P.P.); (O.K.)
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Abstract
Surface chemistry plays a key role in modern applications of polymer materials [...]
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