Investigating the UV-curing performance for polyacrylated polymer in dendritic and regular conformation

Rwei, Syang‐Peng; Chen, Jung-Da

doi:10.1007/s00289-011-0644-3

Cited by 8 publications

(3 citation statements)

References 24 publications

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“…Thus, real‐time FTIR tests can be used to track the IR peak change and evaluate the photocuring kinetics of photosensitive resin combinations . To eliminate the effect of sample thickness fluctuations on the intensity of the characteristic absorption peak of the acrylate double‐bond group (CC), the characteristic absorption peak of the carbonyl group (CO) at 1724 cm −1 was selected as an internal standard to calculate the conversion of acrylate double bonds . The ratio of the peak of the acrylate CC bond at 1636 cm −1 ( A 1636 ) to the peak of the carbonyl group (CO) at 1724 cm −1 ( A 1724 ) represented the concentration of acrylate double bonds.…”

Section: Resultsmentioning

confidence: 99%

“…Researchers reported that free radicals can easily conjugate and terminate the propagation reaction, especially at high doses of photoinitiator . Additionally, the steric hindrance arising from the free‐radical propagation is also believed to inhibit the curing process of resins . As a result, both the conversion degree and photocuring rate are not improved with further increases in the dose of photoinitiator.…”

Section: Resultsmentioning

confidence: 99%

“…In theory, a high content of diluents will contribute to an improvement in the crosslinking density, and this will result in the embrittlement of the cured products. PETA is a trifunctional reactive monomer and has more double bonds than HDDA and TPGDA at the same molar content . Thus, an increase in the PETA content will remarkably improve the crosslinking density and mechanical properties of the cured products.…”

Section: Resultsmentioning

confidence: 99%

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Acrylate‐based photosensitive resin for stereolithographic three‐dimensional printing

Zhang

et al. 2019

J of Applied Polymer Sci

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In this article, we report an acrylate-based three-dimensional (3D) printing stereolithography rapid-prototyping photosensitive resin with a low viscosity, small volumetric shrinkage, high photoreactivity, and excellent strength. The resin was a compound prepared with bisphenol A epoxy acrylate (BAEA) as the main matrix, 1,6-hexanediol diacrylate (HDDA) and tri(propylene glycol) diacrylate (TPGDA) as reactive diluents, pentaerythritol triacrylate (PETA) as the crosslinking agent, and 2-hydroxy-2-methyl propiophenone (1173) and diphenyl(2,4,6-trimethyl benzoyl)phosphine oxide (TPO) as photoinitiators. The photocuring kinetics of the resins with different photoinitiator types and loadings were studied via real-time IR spectroscopy, which provided insights into the optimization of photoinitiator composition and printing parameter settings. The results show that the content change of each component affected the viscosity of the photosensitive resin; this was accompanied by fluctuations in the volume shrinkage and mechanical strength of the cured products. Although an increase in the molar ratio of the reactive diluent remarkably reduced the viscosity of the photosensitive resin and thereby boosted photopolymerization, it also caused an increase in the volume shrinkage and a sacrifice of mechanical strength. Finally, as shown by a comparison of the other samples we studied, the resin composed of 30 mmol HDDA, 50 mmol TPGDA, 10 mmol PETA, 10 mmol BAEA, 2.5 mol % TPO, and 2.5 mol % 1173 achieved the best viscosity of 239.53 mPa s at 25 C, the minimum shrinkage rate of 4.36%, and the maximum tensile strength of 43.19 MPa. The 3D printing curing products had the closest size to the design dimensions of the computer-aided design model; this indicated that the resin seemed to be a most promising candidate for 3D printing applications.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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