Modification of poly(octadecene‐alt‐maleic anhydride) films by reaction with functional amines

Abstract

Thin films of poly(octadecene-alt-maleic anhydride) on top of Si wafers and glass plates were modified by reactions with different functional amines to be used in future studies on the relevance of certain molecular surface properties for the covalent immobilization of proteins. For that aim, a strategy was developed and applied to convert the anhydride moieties of the copolymer by functional amines into side chains bearing hydrophilic groups of acidic (carboxylic acid, sulfonic acid), basic (amines), or neutral (poly(ethylene oxide) (PEO), glucose) character. The modification of the copolymer films was achieved through the two-step formation of a cyclic imide, which was very stable in aqueous solution. Depending on the reactivity of the applied amine, the adjustment of the reaction time was suitable for the preparation of partially converted surfaces of the polymer film. Degrees of modification between 5 and 30% (according to X-ray photoelectron spectroscopy data) were obtained. Annealing the modified polymer films induced efficient back-formation of the anhydride groups. By reaction of the layered polyanhydrides with highly crosslinked diamines, amine-functionalized polymer films were produced that were capable of binding secondary polyanhydride layers.

A one‐step preparation of compatibilized polypropylene‐nanocomposites by reactive extrusion processing

“…is unable to form hydrogen bonds by itself, as the grafted MA groups do not possess a H-bond donor, an equimolar amount of a primary alkyl amine was used to open the anhydride rings, thereby forming an amide-acid structure, 45,46 to provide sites for intermolecular H-bonding to cross-link the rubber. Primary aliphatic amines were used because of their fast reaction in solution with anhydride groups at low temperatures, without the need of a catalyst.…”

Surface Characterization of Biopolymer Micropatterns Processed by Ion‐Beam Modification and PECVD

“…The transition from neutral to basic pH is observed to induce a more drastic change in the contact angle. This transition is produced by the deprotonation of -NH 3 + surface groups on the ALL surface to -NH 2 , thus deactivating some of the polar means of interaction and increasing consequently the CA. These measurements confirm the surface availability and dissociability of the ALLderived amino groups.…”

“…[1] These contrasts are produced by covering the surface with organic functional groups (i.e., carboxylic- [2] or amine- [3] ended chains) neighboring antifouling regions, mostly created from poly(ethylene glycol) derivatives [4] (PEG) or polysaccharides. [5] These surface preparation processes are normally categorized in wet chemistry (selfassembled monolayers, Langmuir-Blodgett, and sol-gel films) and vapor processes.…”

Superhydrophobic Alumina Surfaces Based on Polymer‐Stabilized Oxide Layers

“…The findings excellently agree with our experiments, where methacrylic copolymers were employed to furnish metal oxide surfaces with super-hydrophobic properties. [18] Only those copolymers, containing hydrophilic sequences, were able to form dense and stable coating films on alumina with its hydrophilic sequences preferably directed to the hydrophilic oxide, while the hydrophobic sequences containing long-alkyl chains were enriched at the polymer/air interface. In the case of CHS/POMA, the required covalent linkages between the hydrophilic and hydrophobic polymer sequences are formed by the reaction of amino and maleic anhydride groups.…”