Structure–Property Relationship of Thin Plasma Deposited Poly(allyl alcohol) Films

Abstract

Poly(allyl alcohol) films with a thickness of about 150 nm were deposited by pulse plasma polymerization onto different substrates (inorganic and organic). The structure/property relationships of these samples were studied in dependence on the duty cycle (DC) of the plasma by a broad combination of different techniques and probes. For the first time volume sensitive methods (FTIR and dielectric spectroscopy) are combined with surface analytics by employing XPS for that system. FTIR spectroscopy gives qualitatively the same dependence of the concentration of the OH groups on DC like XPS. The observed differences are discussed considering the different analytical depths of both the methods. The dielectric measurements show that the plasma deposited films are not thermally stable but undergo a post plasma chemical reaction during heating. The results obtained by dielectric spectroscopy are discussed in detail with the data from FTIR and XPS measurements.

Plasma deposition of adhesion-promoting polymer layers onto polypropylene for subsequent covering with thick fire retardant coatings

“…After labeling of OH groups with TFAA, this band diminished and a new on at 1210 cm −1 appears due to the stretching absorption of C-F in CF 3 groups of the TFAA. [9,23] For the melamine resin, a strong and broad absorption band was observed in the region of 3500-3100 cm −1 which could be assigned to the N-H stretching vibration of amino groups consisting of overlapped asymmetric (3368 cm −1 ) and symmetric (3290 cm −1 ) N-H stretching vibrations. In addition, an absorption band situated at about 1610 cm −1 , which corresponds to scissor 'amide II' band.…”

“…[8,9] The XPS survey spectra of ppAAl and of the derivatized reaction product with TFAA [8,9] are represented in Figure 4(b). More previously, the derivatization of OH groups was proved to be highly selective (ca.…”

“…To hinder such excavation of unprotected PP, the melamine coatings must have an excellent adhesion to the polyolefin substrate also in case of flame exposure. [6] Introduction of functional groups into the polyolefin surface, [7] deposition of adhesionpromoting plasma polymer layers, [8,9] formation of chemical bonds, or bonding via spacer introduction [10,11] have promoted substantially the adhesion between coatings and substrate.…”

Adhesion promotion of thick fire-retardant melamine polymer dip-coatings at polyolefin surfaces by using plasma polymers

“…The C 1s peak was fitted into 4 components: C-C, C-H at 284.7 eV, C-O at 286.3 eV, C=O at 287.5 eV, and carboxyl (COOH) at 289 eV as seen in Figure 8(b). [29] 3.3. Preparation and characterization of the thick melamine formaldehyde layer Intumescent flame retardants fulfill the requirements of polymer flame retardancy.…”

The thickness dependence of dielectric properties in the plasma polymer thin films

“…[12,13,21,22]. In addition, there are reports on the dielectric properties of [2,23,24] and on the comparison of their dielectric properties with the structural properties of plasma polymers [25][26][27][28][29]. However, there are no reports on of the pPEO dependent on the film thicknesses.…”