Simultaneous Measurement of Fluorescence, Conversion and Physical/mechanical Properties for Monitoring Bulk and Localized Photopolymerization Reactions in Heterogeneous Systems.
Simultaneous Measurement of Fluorescence, Conversion and Physical/mechanical Properties for Monitoring Bulk and Localized Photopolymerization Reactions in Heterogeneous Systems.
复制标题
同时测量荧光、转化和物理/机械性能，用于监测异质系统中的本体和局部光聚合反应。
DOI：
10.1039/c6ra06341a
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发表时间：
2016
期刊：
影响因子：
3.9
通讯作者：
Stansbury,JW
中科院分区：
文献类型：
--
作者：
Medel,S;Bosch,P;Grabchev,I;Shah,PK;Liu,J;Aguirre-Soto,A;Stansbury,JW
FT-NIR光谱仪，流变仪和荧光分光光度计耦合用于实时监测聚合反应，允许同时跟踪聚合动力学，存储模量和荧光。本研究合成了甲基丙烯酸酯功能化丹酰发色团（DANSMA），并以二甲基丙烯酸氨基甲酸乙酯和甲基丙烯酸异硼酸酯为原料制备了两种不同的纳米凝胶。采用DANSMA探针，乙氧基化双酚A二甲基丙烯酸酯为基体单体，Irgacure®651为引发剂，分散的、单体膨胀的纳米凝胶制备了两个系列的树脂配方，得到了透明的紫外光固化树脂。将荧光探针放置在树脂中或在纳米凝胶分散到基质中之前将其连接到纳米凝胶中，为研究纳米凝胶结构如何通过DANSMA探针的荧光影响局部网络的发展提供了工具。我们展示了这种新技术的潜力，使用复合材料作为两相系统（树脂和可聚合纳米凝胶），包括丹酚衍生物作为可聚合探针来跟踪两相中发生的反应。
An FT-NIR spectrometer, rheometer and fluorescence spectrophotometer were coupled for the real-time monitoring of polymerization reactions, allowing the simultaneous tracking of polymerization kinetics, storage modulus as well as fluorescence. In this study, a methacrylate functionalized dansyl chromophore (DANSMA) was synthesized and two different nanogels were made from urethane dimethacrylate and isobornyl methacrylate. Two series of resin formulations were prepared using the DANSMA probe, ethoxylated bisphenol A dimethacrylate as the matrix monomer, Irgacure® 651 as the initiator and the dispersed, monomer-swollen nanogels to give clear UV-curable resins. Placement of the fluorescent probe either throughout the resin or linked into the nanogel before its dispersion in the matrix provides a tool to study how the nanogel structure affects local network development by means of fluorescence from the DANSMA probe. We demonstrate the potential of this new technique using a composite as the two phase system (resin and polymerizable nanogel) including a dansyl derivative as a polymerizable probe to follow the reactions that are taking places in both phases.