In:
Journal of Polymer Science Part A: Polymer Chemistry, Wiley, Vol. 52, No. 8 ( 2014-04-15), p. 1161-1171
Abstract:
The structural change of the end groups of UV‐cured acrylates with time has been investigated as well as photopolymerization behavior. 2‐Ethylhexyl acrylate, n ‐lauryl acrylate, 2‐(2‐ethoxyethoxy)ethyl acrylate, and 2‐ethylhexyl methacrylate were used as a monomer in the current study. In order to mimic industrial conditions, the photopolymerization was conducted with relatively high UV intensity (576 mW/cm 2 ) using a common photoinitiator 1‐hydroxycyclohexyl phenyl ketone. Conversion‐time profile gave a linear first‐order plot suggesting that the steady state was hold throughout the polymerization. Matrix‐assisted laser desorption/ionization time‐of‐flight mass spectra of the resultant polymers indicated the number of the hydroxycyclohexyl chain‐ends decreased with storage time at room temperature. Instead, a lactonic ring appeared to form at the chain‐end by transesterification of the hydroxycyclohexyl group with the ester side chain of the adjacent acrylate according to the results of mass spectrometry and 13 C NMR. © 2014 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2014 , 52 , 1161–1171
Type of Medium:
Online Resource
ISSN:
0887-624X
,
1099-0518
Language:
English
Publisher:
Wiley
Publication Date:
2014
detail.hit.zdb_id:
3004641-5
detail.hit.zdb_id:
1473076-5
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