In situ photo-cross-linking of cinnamate functionalized poly(methyl methacrylate-co-2-hydroxyethyl acrylate) fibers during electrospinning

Pankaj Gupta, Scott R. Trenor, Timothy Edward Long, Garth L. Wilkes

Research output: Contribution to journalArticle

124 Citations (Scopus)

Abstract

A novel methodology for in situ cross-linking of polymeric fibers during electrospinning is described. The electrospinning apparatus was modified to facilitate UV irradiation of the electrospun fibers while in flight to the collector target. Three polymers with different mol % of the photoreactive cinnamate functional group (4, 9, and 13 mol %) were synthesized and utilized for this study. Fibers of cinnamate functionalized poly(methyl methacrylate-co-2-hydroxyethyl acrylate) were cross-linked in situ by UV irradiation during electrospinning. Subsequent FTIR measurements on irradiated and nonirradiated electrospun fibers indicated both [2π + 2π] cycloaddition of the vinylene C=C and trans-cis photoisomerization of the cinnamate group. Furthermore, the irradiated copolymers were observed to form insoluble gels which indicated that the photodimerization was the primary photoprocess during UV irradiation, leading to the formation of a cross-linked network. As expected, it was found that the gel fraction increased with increasing mol % of the cinnamate species.

Original languageEnglish
Pages (from-to)9211-9218
Number of pages8
JournalMacromolecules
Volume37
Issue number24
DOIs
Publication statusPublished - 2004 Nov 30
Externally publishedYes

Fingerprint

Cinnamates
Electrospinning
Polymethyl Methacrylate
Polymethyl methacrylates
Fibers
Irradiation
Gels
Photoisomerization
Cycloaddition
Functional groups
Polymers
Copolymers
2-hydroxyethyl acrylate

ASJC Scopus subject areas

  • Materials Chemistry

Cite this

In situ photo-cross-linking of cinnamate functionalized poly(methyl methacrylate-co-2-hydroxyethyl acrylate) fibers during electrospinning. / Gupta, Pankaj; Trenor, Scott R.; Long, Timothy Edward; Wilkes, Garth L.

In: Macromolecules, Vol. 37, No. 24, 30.11.2004, p. 9211-9218.

Research output: Contribution to journalArticle

Gupta, Pankaj ; Trenor, Scott R. ; Long, Timothy Edward ; Wilkes, Garth L. / In situ photo-cross-linking of cinnamate functionalized poly(methyl methacrylate-co-2-hydroxyethyl acrylate) fibers during electrospinning. In: Macromolecules. 2004 ; Vol. 37, No. 24. pp. 9211-9218.
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