Expanding Monomers as Anti-Shrinkage Additives

Philipp Marx, Frank Wiesbrock

Publikation: Beitrag in FachzeitschriftÜbersichtsartikelBegutachtung

4 Zitate (Scopus)


Commonly, volumetric shrinkage occurs during polymerizations due to the shortening of the equilibrium Van der Waals distance of two molecules to the length of a (significantly shorter) covalent bond. This volumetric shrinkage can have severe influence on the materials’ properties. One strategy to overcome this volumetric shrinkage is the use of expanding monomers that show volumetric expansion during polymerization reactions. Such monomers exhibit cyclic or even oligo-cyclic structural motifs with a correspondingly dense atomic packing. During the ring-opening reaction of such monomers, linear structures with atomic packing of lower density are formed, which results in volumetric expansion or at least reduced volumetric shrinkage. This review provides a concise overview of expanding monomers with a focus on the elucidation of structure-property relationships. Preceded by a brief introduction of measuring techniques for the quantification of volumetric changes, the most prominent classes of expanding monomers will be presented and discussed, namely cycloalkanes and cycloalkenes, oxacycles, benzoxazines, as well as thiocyclic com-pounds. Spiroorthoesters, spiroorthocarbonates, cyclic carbonates, and benzoxazines are particularly highlighted.
PublikationsstatusVeröffentlicht - 6 März 2021

Bibliographische Notiz

Funding Information:
Funding: This research was funded by the Austrian Government and the State Government of Styria; funding number FFG-862835.

Funding Information:
Acknowledgments: The research work was performed within the K-Project PolyTherm at the Polymer Competence Center Leoben GmbH (PCCL, Austria) within the framework of the COMET-program of the Federal Ministry for Climate Action, Environment, Energy, Mobility, Innovation and Technology and the Federal Ministry for Digital and Economic Affairs with contributions by the Montanuniversitaet Leoben. Funding is provided by the Austrian Government and the State Government of Styria.

Publisher Copyright:
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.

Dieses zitieren