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与传统行业工艺相比,使用高强度紫外线 (UV) 辐射的光化学诱导固化(紫外固化)具有多项优势。感光材料的特征包括更快的固化反应和更好的表面性能。此外,能够避免使用溶剂以及由此产生的具有环境危害性的蒸气。由于这些优势和其他特性,紫外固化敏感材料在油漆、涂料和粘合剂等行业领域日渐重要。此外,光化学固化是各种添加剂制造工艺的基础。流变学方法是一种既定测量方法,用于研究样品在此类光固化反应之前、期间及之后的特性变化,并用于支持新材料的开发。
紫外固化材料被广泛用于汽车、3D打印、医疗和电子等各个行业所用的涂料、粘合剂、密封剂、灌封化合物和油墨中。
粘合剂
对于电子、医疗和汽车制造等不同行业,几秒钟内在材料表面快速实现可靠的功能性粘合是一项迫切的需求。
涂层
开发快速固化表面处理方式可提高工业和消费应用(例如,汽车、医疗或化妆品应用)的生产能力和加工速度。
医疗应用
对于牙科应用以及隐形眼镜的紫外支持型制造工艺而言,先进紫外固化材料是确保卓越性能的至关重要的因素。
增材制造(3D打印)
研究光固化材料在立体光刻工艺的3D打印过程中的固化行为以及发生的收缩非常重要。
基于汞的高压放电灯(汞蒸气灯)通常用作流变测量的紫外辐射源。但是,由于二极管技术的重大进步,LED灯正在成为受欢迎的替代品。
汞蒸气灯的运行原理基于电弧汽化汞。从而发射出不同波长的广谱。可使用滤光片从该光谱中选择特定的波长范围。例如,OmniCure® S2000 紫外光源可覆盖320 nm~500 nm的标准波长。可根据要求提供其他滤光片。
紫外LED光源基于在施加电流时发射接近单色波长光谱的半导体组件。发射光谱特定于所用的半导体材料。因此, 在365 nm、400 nm和460 nm的特定波长下,紫外LED灯头(例如,DELOLUX 50)可用于固化光敏材料。可根据要求提供更多波长。
我们的Thermo Scientific HAAKE MARS 40/60流变仪系列包括为您的应用定制的全面紫外固化测量装置产品组合。其中包括高温下的热辅助紫外固化,以及流变学和傅立叶变换红外光谱联用法的独特组合,以满足输入和输出的质量控制以及材料和工艺的研发需求。
使用HAAKE MARS 40/60流变仪的紫外固化配置的其他优势:
Thermo Scientific HAAKE RheoWin测量和评价软件可用于为紫外固化测试创建完整的测量和评价程序,包括:
| Universal Peltier temperature module for UV-curing applications | UV-assisted thermal curing at elevated temperatures | UV curing for advanced measurements with combined spectroscopy |
|---|---|---|
| A flexible UV-curing module with built-in Peltier temperature control enabling an easy and fast exchange between the UV-curing setup and regular rheological configurations for coaxial cylinder or parallel plate / cone and plate measuring geometries. | A UV light adapter for the CTC (controlled test chamber) oven for UV-assisted thermal curing over a very wide temperature range. | The combination of a rheometer with FTIR spectroscopy for R&D applications. A UV module for the temperature-controlled Thermo Scientific Rheonaut Module for HAAKE MARS Rheometer is available. Simultaneous collection of rheological data and FTIR spectra is enabled to investigate structural changes within the sample during curing. |
| A universal Peltier temperature module with two optional adapters enables three measuring options for highest flexibility at low cost. - Measurements with coaxial cylinder geometries. - Adapter plate for parallel plate or cone and plate geometries. - UV adapter for rheological investigation of curing reactions initiated by UV light irradiation. The UV light source can be triggered automatically by the HAAKE RheoWin Rheometer Control Software. | For thermal-assisted curing across a wide temperature range, a UV cell is integrated into the CTC of the HAAKE MARS Rheometer. Using the HAAKE RheoWin Software, it is possible to program an automatic measuring routine in which the sample is first pre-cured by the UV light and then thermally cured using the CTC. The combination of convection and radiation heating guarantees fast temperature changes and an even temperature distribution within the CTC oven. | This UV curing includes a rotor with a built-in mirror and a glass plate, and it can be used with different standard-temperature modules for plates as well as with the Rheonaut System. The Rheonaut System enables the simultaneous application of rheometry and FTIR spectroscopy to generate a better understanding of the structural changes during curing reactions. |
| Temperature: | ||
| Up to 180°C* | Up to 600°C* | Up to 200°C* |
| Light source: LED or mercury | Light source: LED or mercury | Light source: LED or mercury |
* Highest temperature for the UV module.
Note: This temperature range may be limited by the maximum temperature for which the UV light source and the components used with it (e.g., light guides) were designed.
*OmniCure®是Excelitas Technologies Corp.的注册商标。




