Vinylimidazole copolymers: coordination chemistry, solubility, and cross-linking as function of Cu2+ and Zn2+ complexation
Artikel i vetenskaplig tidskrift, 2011

P(1-VIm-co-MMA) copolymers with 4 or 44 wt.% 1-VIm (abbreviated PVM-4 and PVM-44) where polymerized from 1-VIm (1-vinylimidazole) and methylmethacrylate with azobisisobutyronitrile as initiator and reacted with either Cu(2+) or Zn(2+). The resulting coordinated polymer complexes were studied using ICP-AES, CP/MAS (13)C NMR, conductivity measurements, vibrational spectroscopy (mid-FTIR and far-FTIR), DSC, and EPR. It was established by ICP-AES, CP/MAS (13)C NMR, conductivity, mid-FTIR and EPR measurements that the transition metal ions in the complexes were exclusively coordinated by the imidazole ligand. The coordination geometry is square planar with regard to Cu(II) complexes. The strong interaction between the polymeric imidazole ligand and the transition metal ion cross-links the system, resulting in augmentation of T (g) (the glass transition temperature), especially for copolymers with high relative amount of 1-VIm. The effect of changing metal ion is more complicated and depends on both the strength of the coordinate interaction as well as the coordination number. The solubility of the coordinate polymer complex in conventional solvents is low due to the coordinate cross-links. However, the coordinate polymer complexes are soluble in strongly coordinating solvents such as acetonitrile and dimethylsulfoxide.

Glass transition

internal phase-separation

core/polymer shell microcapsules

cu(ii)

EPR

Vibrational spectroscopy

1-vinylimidazole

Coordinated polymer

field

DSC

spectra

nmr

imidazole complexes

temperature

poly(methyl methacrylate)

raman

metal-ions

Författare

Markus Andersson Trojer

SuMo Biomaterials

Chalmers, Kemi- och bioteknik, Teknisk ytkemi

Örjan Hansson

Göteborgs universitet

Lars Öhrström

Chalmers, Kemi- och bioteknik, Fysikalisk kemi

Alexander Idström

Chalmers, Kemi- och bioteknik, Teknisk ytkemi

SuMo Biomaterials

Magnus Nydén

Chalmers, Kemi- och bioteknik, Teknisk ytkemi

SuMo Biomaterials

Colloid and Polymer Science

0303-402X (ISSN) 1435-1536 (eISSN)

Vol. 289 12 1361-1372

Ämneskategorier

Polymerkemi

Oorganisk kemi

Biofysik

Fundament

Grundläggande vetenskaper

Styrkeområden

Materialvetenskap

DOI

10.1007/s00396-011-2461-5

Mer information

Skapat

2017-10-07