The Importance of Crosslinking and Glass Transition Temperature for the Mechanical Strength of Nanofibers Obtained by Green Electrospinning

Titelangaben

Giebel, Elisabeth ; Getze, Julia ; Greiner, Andreas:
The Importance of Crosslinking and Glass Transition Temperature for the Mechanical Strength of Nanofibers Obtained by Green Electrospinning.
In: Macromolecular Materials and Engineering. Bd. 298 (2013) Heft 4 . - S. 439-446.
ISSN 1439-2054
DOI: https://doi.org/10.1002/mame.201200080

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Abstract

Crosslinked particles containing butyl acrylate, methyl methacrylate, and allyl methacrylate are prepared by free-radical emulsion polymerization. The glass transition temperatures of the polymers are varied by the crosslinking densities in the latex particles. Aqueous acrylate dispersions with polymers of different glass transition temperatures are electrospun with PVA as the matrix polymer. The effects of crosslinking density and Tg on the structure and mechanical properties of the fibers are studied. Crosslinking of unreacted allyl groups is induced by UV irradiation to stabilize the fibers by interparticle crosslinking. Both the ability to undergo interparticle crosslinking and the E modulus depend on the merging of the particles during the electrospinning process.