UV/thermal dual curing of tung oil-based polymers induced by cationic photoinitiator

Huang, Jiajian; Yuan, Teng; Yang, Zhicheng; Man, Limin; Hu, Yang; Yang, Zhuohong

doi:10.1016/j.porgcoat.2018.10.022

Cited by 37 publications

(21 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For instance, tung oil was photocured by using a cationic photoinitiator and it was found that both the free‐radical polymerization and the oxidative polymerization took place simultaneously . Later to improve the mechanical properties of the tung oil‐based coatings, it was mixed with monomers like styrene, divinyl benzene, and so on, and cured under UV light . TE photopolymerization was also used successfully for the preparation of oil‐based coatings.…”

Section: Introductionmentioning

confidence: 99%

Fully bio‐based thiol‐ene photocured thermosets from isosorbide and tung oil

Şeker

Çakmakçı

2020

Journal of Polymer Science

View full text Add to dashboard Cite

Direct preparation of coatings from neat vegetable oils without any pretreatment or modification is an elegant way of demonstrating the potential of renewable sources and it is also in line with the principles of Green Chemistry.In this work, photocured coatings were prepared from tung oil (TO), hazelnut oil (HN), and isosorbide. First, a dithiol derivative of isosorbide (ISTMP) was synthesized and then mixed with TO, HN, and a cationic photoinitiator. For comparison, formulations were also prepared by using two different commercial thiol compounds. Coating formulations were applied onto glass substrates and cured under UV light where oxidative polymerization and photoinitiated thiol-ene addition reactions took place concomitantly. Double bond conversion percentages, thermal degradation properties, water contact angles, and surface hardness of the coatings were determined. Furthermore, a model reaction between ISTMP and oleic acid was performed to prove that ISTMP reacts with the fatty acid. ISTMP containing formulation displayed a fast initial double bond conversion and its water contact angle value was found as 88 ± 3 . Rigid and thermally stable isosorbide ring improved both the thermal properties and the surface hardness of the coatings.

show abstract

Section: Introductionmentioning

confidence: 99%

Fully bio‐based thiol‐ene photocured thermosets from isosorbide and tung oil

Şeker

Çakmakçı

2020

Journal of Polymer Science

View full text Add to dashboard Cite

show abstract

“…The super acids produced by the photolysis of cationic photoinitiators can still initiate cationic polymerization after UV light irradiation or heat treatment. Therefore, the synthetic photosensitive resin with the use of Irgacure 261 can form an interpenetrating polymer network (IPN) structure through a post-curing process [ 27 ].…”

Section: Resultsmentioning

confidence: 99%

Design and Synthesis of Free-Radical/Cationic Photosensitive Resin Applied for 3D Printer with Liquid Crystal Display (LCD) Irradiation

et al. 2020

Self Cite

View full text Add to dashboard Cite

In this work, aiming at a UV-curing 3D printing process with liquid crystal display (LCD) irradiation, a novel free-radical/cationic hybrid photosensitive resin was designed and prepared. After testing, the results showed that the acrylate monomers could be polymerized through a free-radical mechanism, while the epoxides were polymerized by a cationic curing mechanism. During the process of UV-curing, the acrylate and epoxide polymers were crosslinked and further locked together by non-covalent bonds. Therefore, an interpenetrating polymer network (IPN) structure could be formed through light-curing 3D-printing processes. Fourier transform infrared spectroscopy (FT-IR) revealed that the 3,4-epoxy cyclohexyl methyl-3,4-epoxy cyclohexyl formate and acrylic resin were both successfully involved in the UV-curing process. Furthermore, in order to make the 3D-printed objects cured completely, post-processing was of great importance. The results from the systematic study of the dynamic mechanical properties of the printed objects showed that the heating treatment process after UV irradiation was very necessary and favorable for the complete cationic polymerization of UV-6110 induced by Irgacure 261. The optimum heating treatment conditions were achieved at a temperature of 70 °C for 3 h.

show abstract

“…The changing trend of mechanical properties canbe explained by the inherent chemical composition and cross-linking density. In the cured systems, the increase in the grafting number resulted in an increase in the functionality of their structure, which was conducive to the formation of high cross-linking density and helped to increase the rigidity of the cured films, thereby enhancing the mechanical properties of the cured films [39,40]. In addition, the characteristics of different vegetable oil-based UV-cured films were compared.…”

Section: Mechanical Propertiesmentioning

confidence: 99%

One-Step Synthesis of Novel Renewable Vegetable Oil-Based Acrylate Prepolymers and Their Application in UV-Curable Coatings

Lin

Zhang

et al. 2020

Polymers

Self Cite

View full text Add to dashboard Cite

With the rapid development of social economy, problems such as volatile organic compound (VOC) pollution and the excessive consumption of global petroleum resources have become increasingly prominent. People are beginning to realize that these problems not only affect the ecological environment, but also hinder the development of the organic polymer material industry based on raw fossil materials. Therefore, the modification and application of bio-based materials are of theoretical and practical significance. In this study, a series of vegetable oil-based acrylate prepolymers were synthesized by one-step acrylation using palm oil, olive oil, peanut oil, rapeseed oil, corn oil, canola oil, and grapeseed oil as raw materials, and the effect of different double bond contents on the product structure and grafting rate was investigated. Furthermore, the as-prepared vegetable oil-based acrylate prepolymers, polyurethane acrylate (PUA-2665), trimethylolpropane triacrylate (TMPTA), and photoinitiator (PI-1173) were mixed thoroughly to prepare ultraviolet (UV)-curable films. The effect of different grafting numbers on the properties of these films was investigated. The results showed that as the degree of unsaturation increased, the acrylate grafting number and the cross-linking density increased, although the acrylation (grafting reaction) rate decreased. The reason was mainly because increasing the double bond content could accelerate the reaction rate, while the grafted acrylic groups had a steric hindrance effect to prevent the adjacent double bonds from participating in the reaction. Furthermore, the increase in grafting number brought about the increase in the structural functionality of prepolymers and the cross-linking density of cured films, which led to the enhancement in the thermal (glass transition temperature) and mechanical (tensile strength, Young’s modulus) properties of the cured films.

show abstract

UV/thermal dual curing of tung oil-based polymers induced by cationic photoinitiator

Cited by 37 publications

References 26 publications

Fully bio‐based thiol‐ene photocured thermosets from isosorbide and tung oil

Fully bio‐based thiol‐ene photocured thermosets from isosorbide and tung oil

Design and Synthesis of Free-Radical/Cationic Photosensitive Resin Applied for 3D Printer with Liquid Crystal Display (LCD) Irradiation

One-Step Synthesis of Novel Renewable Vegetable Oil-Based Acrylate Prepolymers and Their Application in UV-Curable Coatings

Contact Info

Product

Resources

About