Elastomeric polymers. 1. Application of proton NMR imaging to the morphological study of a silicone rubber

Maristella Gussoni, Fulvia Greco, Marina Mapelli, Alessandra Vezzoli, Elisabetta Ranucci, Paolo Ferruti, Lucia Zetta

Research output: Contribution to journalArticlepeer-review

Abstract

Proton NMR imaging techniques were used to characterize a silicone rubber, intended mainly for biomedical applications, modified by an "in situ" polymerization. The study was aimed at the investigation of the effect of the polymerization on the silicone properties and of the dispersion of the guest polymer inside the host matrix. Before the onset of the reaction, the silicone, swollen either in water or in toluene, was characterized. Any source of inhomogeneities such as air bubbles or defects was localized and measured, and the geometry was recognized. By comparing the signal intensity from images collected before, during and after the polymerization reaction as well as the T 1 and T 2 relaxation time values, the guest polymer was found almost homogeneously dispersed in the host matrix, without preferential locations and/or agglomerates. The silicone network did not appear significantly altered by the presence of the guest polymer. The occurrence of the "in situ" polymerization reaction was proved by infrared spectroscopy.

Original languageEnglish
Pages (from-to)1714-1721
Number of pages8
JournalMacromolecules
Volume35
Issue number5
DOIs
Publication statusPublished - Feb 26 2002

ASJC Scopus subject areas

  • Materials Chemistry

Fingerprint Dive into the research topics of 'Elastomeric polymers. 1. Application of proton NMR imaging to the morphological study of a silicone rubber'. Together they form a unique fingerprint.

Cite this