The effect of pre‐curing UV‐irradiation on the crosslinking …

Selective pre‐curing UV‐irradiation (right) and its effect on the kinetics of reaction of heat‐cure silicone elastomers (left) can be prescribed to design architected solid membranes with ...

200mm Desktop UV Curing Conveyor with adjustable Irradiation …

The 200mm Desktop UV Curing Conveyor System is a High-Intensity Curing System designed for benchtops and temporal working stations, equipped with a mercury bulb. Features: Its reduced size makes it easy to transport and locate, ideal for desktops and temporary working stations/areas. ... Irradiation Distance: Adjustable 50-200mm (1.9 …

Sterilizing photocurable materials by irradiation: preserving UV-curing …

Temperatures ranged from 50 to 80 °C and durations ranged from 10 min (prior to irradiation) to 60 min (post irradiation). 2.4 UV curing. An LED system (Heraeus NobleCure Altair 75, wavelength 385 nm, irradiance 2.2 W/cm 2) was used for curing the photogels. The system consisted of a chamber with adjustable positioning of the sample …

UV CHAMBER | UV LED Curing Oven

The UV CHAMBER TM is an easy-to-use UV LED irradiation oven suitable for a wide range of applications: bonding, curing, drying, hardening and photolithography. Thanks to its ergonomic design, the UV CHAMBER …

UV-radiation curing of acrylate/epoxide systems

Abstract. Interpenetrating polymer networks (IPNs) have been synthetized by light-induced cross-linking polymerization of a mixture of acrylate and epoxide monomers. The consumption of each monomer upon UV-irradiation in the presence of radical and cationic-type photoinitiators was monitored in situ by real-time infrared spectroscopy. …

UV curing and matting of acrylate nanocomposite coatings by 172nm

Thus, no dependence of the degree of curing on penetration depth of UV irradiation was observed. At the surface of the coating, a higher resolution of depth profiling can be achieved by using a conventional diamond ATR unit. Due to the finite penetration depth of infrared radiation of 1–2 ␮m from the diamond into a sample, only a thin ...

UV curing and matting of acrylate nanocomposite

To elucidate the effect of short-wavelength vacuum UV (VUV) irradiation on the UV curing and matting of acrylate formulations, a real-time (ATR) FTIR spectrometer attached to a UV lamp set-up consisting of a monochromatic 172 nm (Xe 2 *) excimer lamp or a polychromatic medium pressure mercury arc lamp has been applied. In the …

Room-temperature fast-curing polybenzoxazine hybrid thermosets via UV

UV irradiation reactions can proceed very fast, in a few seconds, at room temperature [42], [43]. Meanwhile, they are also environmentally friendly and energy-saving. Therefore, UV curing has been widely used in some areas such as coatings and adhesives. The thiol-ene reaction is a kind of click reactions that allows for highly efficient …

LED Spot Type UV CURING SYSTEM Application Guide

The high-power irradiation reduces the curing time (takt time). The programmed irradiation enables individual UV irradiation by each LED head. The temperature feedback control keeps the UV intensity constant, stabilizing the finish quality. The lower power consumption contributes to a reduction of CO2 emissions.

UV-Radiation Curing of Adhesives

Dual-cure systems combining UV irradiation and thermal treatment have also been developed. They contain two types of reactive functions: a UV-curable functional group (usually an acrylate double bond) and a thermally curable functional group. ... UV irradiation to generate a tacky cohesive polymer—protection of the tacky surface by a …

UV curing and matting of acrylate nanocomposite coatings …

Thus, no dependence of the degree of curing on penetration depth of UV irradiation was observed. At the surface of the coating, a higher resolution of depth profiling can be achieved by using a conventional diamond ATR unit. Due to the finite penetration depth of infrared radiation of 1–2 ␮m from the diamond into a sample, only a thin ...

The Principle of Irradiation Curing

As soon as the reaction is activated by the UV irradiation the fluid layer "cross-links" to an inert flm within a split-second. The majority of UV coatings offer a coating residual, i.e. they cure almost without loss of coat thickness or VOCemissions. The irradiation-sensitive element of the coating formulation is the photo initiator.

Preparation and characterization of ultra violet (UV) …

Films were soaked in monomer formulation for 3 min to optimized a definite formulation for curing bio-blend films of under UV radiation at different doses (2, 4, 6, 8 and 10 passes). After 24 h of UV irradiation, several physical properties of …

Effect of UV-curing conditions on the polymer structures: a …

Radical photopolymerization, which is referred to as "UV-curing", has been utilized for various applications. In most applications, such as coatings, inks, and …

Curing of composite components by ultraviolet radiation: A …

Abstract. Curing of polymer matrices by ultraviolet (UV) irradiation can be applied to a variety of processes in the production of composite components, as long as the component can be directly irradiated. Wet lay-up techniques, vacuum infusion type …

UV curing and matting of acrylate nanocomposite coatings by 172nm

Abstract and Figures. For UV-curable acrylate coatings reinforced by silica nanoparticles, the effect of 172 nm excimer irradiation on the surface roughness has been studied. A dual UV lamp set-up ...

A novel application of acrylic resin UV-Curing methodology …

A unique UV-Curing method is provided for decontamination of radioisotopes on the surfaces which has radiation dealing facilities. In this method acrylic UV-Curing resin was poured on a contaminated simulated surface followed by UV irradiation. The resin interacted with the contaminated surface and after polymerization, …

Highly efficient UVLED curing process

Novel UV curing process by LED irradiation has been developed to enhance capability of UV curable materials. The process is featured by IR irradiation prior UV irradiation.

Irradiation-cured graphene composite films: a comparison …

In this work, a series of graphene-based composite films were prepared via electron beam (EB) or ultraviolet (UV) irradiation. The influence of the graphene …

Recent advances in UV/thermal curing silicone polymers

Under UV irradiation, many photopolymerization mechanisms (free-radical polymerization or cationic polymerization) can be realized through photoinitiators …

Curing of Cellulose Hydrogels by UV Radiation for …

The use of biomaterials as a replacement for thermoplastic polymers is an environmentally sound strategy. In this work, hydrogels of cellulose isolated from wheat husk were modified by UV irradiation (353 nm) to improve mechanical performance. The cellulose was dissolved with a solvent system N,N -dimethylacetamide/lithium chloride …

UV curing and matting of acrylate nanocomposite

For UV-curable acrylate coatings reinforced by silica nanoparticles, the effect of 172. nm excimer irradiation on the surface roughness has been studied.. A dual UV lamp set-up consisting of a 172 nm excimer lamp and a mercury arc lamp allowed obtaining gloss levels down to 0.5 units (at 60°) depending on the acrylate formulation and curing …

UV-Initiated Crosslinking Reaction Mechanism and Electrical …

Furthermore, small molecular initiation systems with high volatility are prone to be evaporated and deposit on the UV lamp cover in the crosslinking process, which will decrease the UV light transmission efficiency and corrode the irradiation equipment [7,8,9]. Therefore, it is urgent to develop a novel photon initiator and auxiliary ...

A review on recent development and application of radiation …

Radiation curing is the process of coating, ink, or adhesive polymerizing (crosslinking) directly on a substrate through interaction with incident radiation. …

Preparation of SiCN ceramic fibres via UV irradiation curing …

The effects of UV irradiation time on the composition, microstructure and ceramic yields of PSZ fibres were investigated by relevant characterizations, including gel permeation chromatography ...

Preparation of SiCN ceramic fibres via UV irradiation curing …

The effects of UV irradiation time on the composition, microstructure and ceramic yields of PSZ fibres were investigated by relevant characterizations, including …

Curing and properties of urethane acrylates with different

1. Introduction. Electron-beam (EB) irradiation curing typically uses a low-energy EB accelerator as an energy source to realize the transformation of liquid or viscous low-molecular-weight compounds into solid or non-viscous high-molecular-weight polymers [1].Electron beam is a stream of high-energy charged particles that can directly or …

Polyimide films tailored by UV irradiation: Surface …

Three aromatic polyimide-based materials incorporating different and common building blocks have been developed and submitted to UV irradiation at room temperature and atmospheric environment. The impact of the UV cure strongly depends on the films' structure, as shown by in-depth FT–IR analysis and supported by EDX evaluation.

UV CURING BASICS

UV Coating. Substrate. 280 – 315 nm. Longer wavelength for deeper penetration. 315 – 380 nm. UV closest to the visible spectrum to cure deep layers, e.g. …

A two-step UV curing process for producing high tensile …

to curing with single wavelengths in the range below and near 220 nm. The results of stress measurement and structural characterization by Fourier Transform Infrared Spectroscopy (FTIR) led to a two-step curing procedure combining irradiation by two different UV lamps with main emission peaks at wavelengths about 172 nm and 222 nm, …

A review on recent development and application of radiation curing …

1. Introduction. Radiation curing is the process of coating, ink, or adhesive polymerizing (crosslinking) directly on a substrate through interaction with incident radiation. Although a variety of radiation types have been utilized in the past, ultraviolet (UV) and electron beam (EB) curing dominate modern technology.