In:
Journal of Applied Polymer Science, Wiley, Vol. 137, No. 34 ( 2020-09-10)
Abstract:
The process of two‐wave photopolymerization of a UV‐curable composition with an optically degrading inhibitor is considered. By numerical simulation, it is shown that in the composition layer uniformly exposed to UV‐radiation, such systems allow getting segments with different conversion under the action of inhomogeneous visible light. Based on the data on the photopolymerization kinetics of the compositions from triethylene glycol dimethacrylate (TEGDMA) and bis phenol‐A glycidyl dimethacrylate ( bis ‐GMA) with the UV‐initiator 2,2‐dimethoxy‐2‐phenylacetophenone (DMPA), it was shown that 3,5‐di‐ tert ‐butyl‐ o ‐benzoquinone (35Q) with N , N ‐dimethylaniline (DMA, “Aldrich”, 99%) can serve as an inhibitor that degrades under action of visible radiation. Combining inhomogeneous visible light generated with a conventional DLP‐projector and uniform UV‐radiation of LED (365 nm) the two‐wave lithographic process was implemented to create polymeric 2D‐structures in 20 μm layer of the compositions from TEGDMA (70)/ bis ‐GMA (30)/DMPA (0.05 wt%)/35Q (0.5 wt%)/DMA (1 wt%).
Type of Medium:
Online Resource
ISSN:
0021-8995
,
1097-4628
Language:
English
Publisher:
Wiley
Publication Date:
2020
detail.hit.zdb_id:
1491105-X