Photo-Mediated Copper(I)-Catalyzed Azide-Alkyne Cycloaddition (CuAAC) "Click" Reactions for Forming Polymer Networks as Shape Memory Materials.
Photo-Mediated Copper(I)-Catalyzed Azide-Alkyne Cycloaddition (CuAAC) "Click" Reactions for Forming Polymer Networks as Shape Memory Materials.
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DOI：
10.1016/j.polymer.2014.08.001
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发表时间：
2014-11-05
期刊：
影响因子：
4.6
通讯作者：
Bowman, Christopher N.
中科院分区：
文献类型：
--
作者：
McBride, Matthew K.;Gong, Tao;Nair, Devatha P.;Bowman, Christopher N.
描述了通过铜 (I) 催化的叠氮化物 - 炔环加成 (CuAAC) 点击反应聚合的聚合物网络的形成及其作为形状记忆聚合物的伴随用途。由于反应的点击性质以及叠氮化物和炔烃官能单体的合成可及性，聚合物结构很容易通过单体设计来控制，以控制交联密度、进一步官能化的能力和玻璃化转变温度（55至120°C）。自由应变恢复用于量化 CuAAC 网络模型的形状记忆特性，从而实现出色的形状固定性和 99% 的恢复率。这种聚合的逐步生长性质导致均匀网络形成，玻璃化转变范围窄，这些材料的转变半宽度接近 15°C，导致模型系统中的形状恢复锐度为 3.9%/°C，与类似的交联链增长聚合物相当。利用CuAAC反应形成形状记忆材料开辟了一系列可能性和行为，这是其他形状记忆材料（例如（甲基）丙烯酸酯、硫醇烯、硫醇-迈克尔和聚（己内酯）基形状记忆材料）不易实现的。
The formation of polymer networks polymerized with the Copper (I) – catalyzed azide – alkyne cycloaddition (CuAAC) click reaction is described along with their accompanying utilization as shape memory polymers. Due to the click nature of the reaction and the synthetic accessibility of azide and alkyne functional-monomers, the polymer architecture was readily controlled through monomer design to manipulate crosslink density, ability for further functionalization, and the glass transition temperature (55 to 120°C). Free strain recovery is used to quantify the shape memory properties of a model CuAAC network resulting in excellent shape fixity and recovery of 99%. The step growth nature of this polymerization results in homogenous network formation with narrow glass transitions ranges having half widths of the transition close to 15°C for these materials resulting in shape recovery sharpness of 3.9 %/°C in a model system comparable to similarly crosslinked chain growth polymers. Utilization of the CuAAC reaction to form shape memory materials opens a range of possibilities and behaviors that are not readily achieved in other shape memory materials such as (meth) acrylates, thiolene, thiol-Michael, and poly(caprolactone) based shape memory materials.
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影响因子：
4.6
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