Functional Off-Stoichiometry Thiol-ene-epoxy Thermosets Featuring Temporally Controlled Curing Stages via an UV/UV Dual Cure Process
Functional Off-Stoichiometry Thiol-ene-epoxy Thermosets Featuring Temporally Controlled Curing Stages via an UV/UV Dual Cure Process
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DOI：
10.1002/pola.27276
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发表时间：
2014-09-15
影响因子：
--
通讯作者：
Haraldsson, Tommy
中科院分区：
文献类型：
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作者：
Carlborg, Carl Fredrik;Vastesson, Alexander;Haraldsson, Tommy
我们提出了一种简便的两阶段UV/UV活化方法用于非化学计量比硫醇-烯-环氧（OSTE+）网络的聚合。我们表明，这些环氧基树脂的处理和加工更容易通过引入基于两个步骤的受控固化技术的材料，其中第一步提供优异的加工能力，第二步产生具有合适的最终性能的聚合物。我们调查的顺序硫醇-烯和硫醇-环氧反应，在这些步骤中，通过研究的机械性能，官能团转化，吸水性，水解稳定性和热稳定性，在几个不同的硫醇-烯-环氧配方。最后，我们得出结论，固化阶段可以分离长达24小时，这是有前途的实用性，这种技术在工业应用中。(C)2014 Wiley Periodicals，Inc.
We present a facile two-stage UV/UV activation method for the polymerization of off-stoichiometry thiol-ene-epoxy, OSTE+, networks. We show that the handling and processing of these epoxy-based resins is made easier by introducing a material with a controlled curing technique based on two steps, where the first step offers excellent processing capabilities, and the second step yields a polymer with suitable end-properties. We investigate the sequential thiol-ene and thiol-epoxy reactions during these steps by studying the mechanical properties, functional group conversion, water absorption, hydrolytic stability, and thermal stability in several different thiol-ene-epoxy formulations. Finally, we conclude that the curing stages can be separated for up to 24 h, which is promising for the usefulness of this technique in industrial applications. (C) 2014 Wiley Periodicals, Inc.