Photopolymerized Thiol-Ene Systems as Shape Memory Polymers.
Photopolymerized Thiol-Ene Systems as Shape Memory Polymers.
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DOI：
10.1016/j.polymer.2010.07.027
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发表时间：
2010-09-03
期刊：
影响因子：
4.6
通讯作者：
Shandas, Robin
中科院分区：
文献类型：
--
作者：
Nair, Devatha P.;Cramer, Neil B.;Scott, Timothy F.;Bowman, Christopher N.;Shandas, Robin
在这项研究中，我们介绍了硫醇-烯光聚合物作为形状记忆聚合物系统的应用。将硫醇-烯聚合物网络与常用的丙烯酸形状记忆聚合物进行比较，结果表明，对于两种不同的硫醇-烯聚合物配方，硫醇-烯聚合物网络的性能都有显著改善。通过热力学和力学分析，我们证明了基于硫醇-烯的形状记忆聚合物体系具有类似的热机械性能，同时由于硫醇-烯聚合机理导致形成了低收缩应力和可忽略的氧抑制的均相聚合物网络而表现出许多有利的性质。与丙烯酸聚合物相比，得到的硫醇-烯形状记忆聚合物体系具有韧性和柔韧性。本研究中评估的聚合物的玻璃化转变温度在30至40℃之间，自由应变恢复率大于96%，约束应力恢复率为100%。硫醇-烯聚合物具有良好的形状稳定性和快速而清晰的形状记忆驱动响应。
In this study we introduce the use of thiol-ene photopolymers as shape memory polymer systems. The thiol-ene polymer networks are compared to a commonly utilized acrylic shape memory polymer and shown to have significantly improved properties for two different thiol-ene based polymer formulations. Using thermomechanical and mechanical analysis, we demonstrate that thiol-ene based shape memory polymer systems have comparable thermomechanical properties while also exhibiting a number of advantageous properties due to the thiol-ene polymerization mechanism which results in the formation of a homogenous polymer network with low shrinkage stress and negligible oxygen inhibition. The resulting thiol-ene shape memory polymer systems are tough and flexible as compared to the acrylic counterparts. The polymers evaluated in this study were engineered to have a glass transition temperature between 30 and 40 °C, exhibited free strain recovery of greater than 96% and constrained stress recovery of 100%. The thiol-ene polymers exhibited excellent shape fixity and a rapid and distinct shape memory actuation response.
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影响因子：
4.9
作者：
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通讯作者：
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作者：
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DOI：
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发表时间：
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影响因子：
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作者：
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通讯作者：
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影响因子：
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作者：
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通讯作者：
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