Characterization of plasma-polymerized allyl alcohol polymers and copolymers with styrene

Mix, Renate; Gerstung, Vanessa; Falkenhagen, Jana; Schulze, R.‐D.; Friedrich, Jörg

doi:10.1163/156856107780474957

Cited by 14 publications

(3 citation statements)

References 27 publications

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“…These facts are suggesting that chemical copolymerization processes contribute substantially to the film deposition, at least in the case of the styrene allylamine feed gas mixtures. In ref.,45 the conclusion was drawn from a study of styrene‐allyl alcohol plasma copolymerization; in this case, plasma polymer compositions differing from the mixture composition is a strong indicator for a dominance of (radical) chemical copolymerization over the random plasma copolymerization. “Classic” radical copolymerization processes are reviewed in detail in a text book 42.…”

Section: Discussionmentioning

confidence: 99%

Surface Chemical Analysis of Plasma‐Deposited Copolymer Films Prepared from Feed Gas Mixtures of Ethylene or Styrene with Allylamine

Swaraj

Oran

Lippitz

et al. 2007

Plasma Processes & Polymers

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Plasma deposited ethylene/allylamine and styrene/allylamine copolymer films were prepared and analyzed using XPS, NEXAFS and ToF‐SIMS. The relative partial flow rate of the each monomer was used as the variable deposition parameter, while the other deposition parameters were kept constant at optimized values for the retention of functional groups. The effect of the variation in the relative partial flow rates of co‐monomers on various chemical aspects of the films like unsaturation, nitrogen retention and branching was investigated revealing several non‐linear correlations. This observation is taken as an indication for chemical copolymerization processes during film deposition. An attempt is made to compare these non‐linear correlations with approaches which have been developed for classic radical copolymerization processes. The aging behavior of these plasma copolymer films was also studied; the results indicated a stabilization against oxidation in comparison to the aging of allylamine plasma homopolymers.

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Section: Discussionmentioning

confidence: 99%

Surface Chemical Analysis of Plasma‐Deposited Copolymer Films Prepared from Feed Gas Mixtures of Ethylene or Styrene with Allylamine

Swaraj

Oran

Lippitz

et al. 2007

Plasma Processes & Polymers

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“…A very high degree of polydispersity (broad molar mass distribution) characterizes the (small) soluble fraction of plasma polymers, which can only be separated by chromatographic methods 22, 143. As already mentioned, high‐energy UV radiation from the plasma upon an existing plasma polymer deposit produces extraordinarily random, irregular structures with crosslinking, numerous defects and radicals 22.…”

Section: Structures Of Plasma Polymersmentioning

confidence: 99%

Mechanisms of Plasma Polymerization – Reviewed from a Chemical Point of View

Friedrich

2011

Plasma Processes & Polymers

364

336

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Several reaction mechanisms have been proposed for the formation of plasma polymers, such as monomer fragmentation followed by poly‐recombination into randomly structured and crosslinked films; fragmentation, accompanied by the formation of acetylene or other film‐forming intermediates and deposition of polystyrene‐like material; plasma‐initiation of a radical chain‐growth polymerization; and ion‐molecule reactions, as well as ionic chain‐growth polymerization. The bulk structure of plasma polymers is completely irregular, far from that of conventional polymers. The retention of functional groups during plasma polymerization tends to be greater than that of the entire monomer structure found again as an intact repeat unit in the resulting plasma polymer. An alternative method for depositing ultra‐thin, pin‐hole free coatings, ones that possess regular structures, is by electrospray ionization (ESI) of pre‐fabricated polymers.

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“…Regardless of these indubitable advantages, being a polymerization technique of its own with a rather limited knowledge about the reaction routes, a meaningful analysis of (aerosol assisted) plasma polymers hence requires characterization techniques or strategies to be specifically implemented. Amongst the most powerful techniques currently available, nuclear magnetic resonance (NMR), liquid chromatography (LC and all variations), and mass spectrometry (MS) have already been reported as particularly well‐suited for the chemical, molecular, and structural exploration of the resulting coatings or to gain insights into some plasma‐polymerization pathways …”

Section: Introductionmentioning

confidence: 99%

In Situ Generation of Plasma-Polymer Standards by Plasma Assisted Free Radical Polymerization

Fouquet¹,

Mertz²,

Becker³

et al. 2014

Plasma Process. Polym.

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The use of reliable reference compounds was recently shown as a powerful strategy for a thorough characterization of plasma‐polymers, but their elaboration remains a topical issue since wet chemistry leads to linear structures with specific chain ends which poorly mimic the notorious disorder found in plasma‐polymers. Here is proposed the elaboration of standards directly using aerosol assisted plasma polymerization. Exaggerating the phenomenon observed in a so‐called ante plasma zone where no discharge is ignited but thick organic coatings are deposited brought the concept of discharge overfeeding to decrease the energy per particle and produce intermediate polymeric materials between conventional polymers and plasma‐polymers, synthesized through a plasma‐assisted free radical polymerization.

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Characterization of plasma-polymerized allyl alcohol polymers and copolymers with styrene

Cited by 14 publications

References 27 publications

Surface Chemical Analysis of Plasma‐Deposited Copolymer Films Prepared from Feed Gas Mixtures of Ethylene or Styrene with Allylamine

Surface Chemical Analysis of Plasma‐Deposited Copolymer Films Prepared from Feed Gas Mixtures of Ethylene or Styrene with Allylamine

Mechanisms of Plasma Polymerization – Reviewed from a Chemical Point of View

In Situ Generation of Plasma-Polymer Standards by Plasma Assisted Free Radical Polymerization

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