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Simultaneous time-resolved measurement of the reaction rates and the refractive index of photopolymerization processes

机译:同时测定光聚合过程的反应速率和折射率

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摘要

We explore the use of imaging surface plasmon resonance (iSPR) to simultaneously measure the refractive index and reaction rates of the commercially available Ormocore photosensitive resist during photo-polymerization. To this end, we adapted a commercially available iSPR device. We demonstrate good accuracy in the measurement of the refractive index determined independently of the thickness of the polymerized film. Furthermore, we demonstrate that the refractive index is proportional to the degree of cure (double bond conversion) of the resist. This allows the determination of the reaction rates of the polymerization processes, which show reasonable agreement with photodifferential scanning calorimetry measurements.
机译:我们探索使用成像表面等离子体共振(iSPR)来同时测量光聚合过程中商用Ormocore光敏抗蚀剂的折射率和反应速率。为此,我们采用了市售的iSPR设备。我们证明了独立于聚合膜厚度而确定的折射率测量具有良好的准确性。此外,我们证明了折射率与抗蚀剂的固化程度(双键转换)成正比。这样就可以确定聚合过程的反应速率,这与光差扫描量热法测量值显示出合理的一致性。

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