Difunctional vinyl sulfonate esters for the fabrication of tough methacrylate-based photopolymer networks

Gorsche, Christian; Seidler, Konstanze; Harikrishna, R.; Kury, Markus; Koch, Thomas; Moszner, Norbert; Liska, Robert

doi:10.1016/j.polymer.2018.10.024

Cited by 15 publications

(17 citation statements)

References 30 publications

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“…alkyl bromide, sulfide-derived compounds). 35,36,43,44 Varying A or L on AFCT reagents allows alternation in chain transfer efficiency. 40,43,44 An ideal AFCT-based chain transfer radical polymerization (Fig.…”

Section: Afct Polymerizationmentioning

confidence: 99%

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Recent advances to decrease shrinkage stress and enhance mechanical properties in free radical polymerization: a review

Fang

Guymon

2021

Polymer International

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Free radical polymerizations have been widely used for a variety of applications, including coating, packaging, adhesives, inks and dental materials. However, shrinkage stress in network systems due to volumetric shrinkage during polymerization often results in poor mechanical performance of final materials, often limiting end use. Delaying gelation during polymerization while incorporating functional structure or functionalized groups into the polymer networks may lead to significantly reduced shrinkage stress and, consequently, enhanced thermomechanical properties. In this review, we summarize several practical methods, including thiol–ene radical polymerization, addition–fragmentation chain transfer, controlled radical polymerization, covalent adaptable networks, ring‐opening polymerization and cyclopolymerization, that have shown promise in reducing volumetric shrinkage and associated stress in network‐forming systems. The resulting enhanced (thermo)mechanical material properties of these modified polymers are also introduced. These methods have proven to be powerful tools for fabricating polymers with novel functionality and properties and thereby show potential to expand application of free radical thermoset materials. © 2021 Society of Industrial Chemistry.

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Section: Afct Polymerizationmentioning

confidence: 99%

“…methylene, ether) and leaving group (L; e.g. alkyl bromide, sulfide‐derived compounds) 35, 36, 43, 44 . Varying A or L on AFCT reagents allows alternation in chain transfer efficiency 40, 43, 44 .…”

Section: Afct Polymerizationmentioning

confidence: 99%

Recent advances to decrease shrinkage stress and enhance mechanical properties in free radical polymerization: a review

Fang

Guymon

2021

Polymer International

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“…However, if a low optical density strategy is followed to maximize the depth of cure, absorbent fillers are avoided. Suitable methods for optimizing polymer properties include variation of the monomer content as well as toughening via living radical polymerization using chain transfer agents [ 36 , 37 , 38 ]. Polymers prepared from resins containing either PTHF 2900 -DM or PTHF 4000 -DM as crosslinkers and an increasing amount of IBOMA as copolymer are characterized to address, whether resins suitable for FPP, can be designed to meet various mechanical requirements.…”

Section: Resultsmentioning

confidence: 99%

Resins for Frontal Photopolymerization: Combining Depth-Cure and Tunable Mechanical Properties

et al. 2021

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Photopolymerization has undergone significant development in recent years. It enables fast and easy processing of materials with customized properties and allows precise printing of complex surface geometries. Nevertheless, photopolymerization is mainly applied to cure thin films since the low curing depth limits the fast production of large volumes. Frontal photopolymerization (FPP) is suitable to overcome these limitations so that curing of centimeter-thick (meth)acrylic layers can be accomplished within minutes by light induction only. Prerequisites, however, are the low optical density of the resin and bleaching ability of the photoinitiator. To date, tailored FPP-resins are not commercially available. This study discusses the potential of long-chain polyether dimethacrylates, offering high-temperature resistance and low optical density, as crosslinkers in photobleaching resins and investigates the mechanical properties of photofrontally-cured copolymers. Characteristics ranging from ductile to hard and brittle are observed in tensile tests, demonstrating that deep curing and versatile material properties are achieved with FPP. Analyzed components display uniform polymerization over a depth of four centimeters in Fourier transform infrared spectroscopy and swelling tests.

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“…This is in accordance with prior findings that AFCT groups slightly retard the gelation due to their regulating mechanism. 28,39,40 The higher t g of the PPO-H formulations can therefore be seen as a first indication that network regulation takes place. Within the PPO-D series (E-H), there is almost no difference in t g with increasing PPO-D content.…”

Section: Assessment Of Photoreactivity Via Rt-nir Photorheologymentioning

confidence: 98%

Heterotelechelic poly(propylene oxide) as migration-inhibited toughening agent in hot lithography based additive manufacturing

et al. 2021

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Difunctional vinyl sulfonate esters for the fabrication of tough methacrylate-based photopolymer networks

Cited by 15 publications

References 30 publications

Recent advances to decrease shrinkage stress and enhance mechanical properties in free radical polymerization: a review

Recent advances to decrease shrinkage stress and enhance mechanical properties in free radical polymerization: a review

Resins for Frontal Photopolymerization: Combining Depth-Cure and Tunable Mechanical Properties

Heterotelechelic poly(propylene oxide) as migration-inhibited toughening agent in hot lithography based additive manufacturing

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