Multifunctional Poly(ε-caprolactone)-Forming Networks by Diels-Alder Cycloaddition: Effect of the Adduct on the Shape-Memory Properties
Multifunctional Poly(ε-caprolactone)-Forming Networks by Diels-Alder Cycloaddition: Effect of the Adduct on the Shape-Memory Properties
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DOI：
10.1002/macp.201100408
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发表时间：
2012-01-27
影响因子：
2.5
通讯作者：
Alexandre, Michael
中科院分区：
文献类型：
--
作者：
Defize, Thomas;Riva, Raphael;Alexandre, Michael
用不同的二烯(呋喃和菲)和亲二烯基团(马来酰亚胺)对星形聚己内酯S进行官能化，并比较了两种DielsAlder加合物熔融共混形成网络的动力学。当在60℃下固化时，与呋喃马来酰亚胺加合物相比，苯并马来酰亚胺网络形成得更快，并产生更强的交联性物质。从DielsAlder加合物稳定性的角度比较了这些网络的形状记忆特性。这两种材料都表现出极好的固定率和恢复率，但呋喃马来酰亚胺加合物的相对较低的回弹温度在0至60摄氏度的循环拉伸测试中扰乱了网络的机械稳定性，而并茂马来酰亚胺加合物被证明在150摄氏度以下稳定。
Star-shaped poly(epsilon-caprolactone)s are functionalized by various dienes (furan and anthracene) and a dienophile (maleimide), and the kinetics of network formation by melt-blending is compared for both DielsAlder adducts. When curing at 60 degrees C, the anthracenemaleimide network forms more rapidly and gives rise to a more crosslinked material than with the furanmaleimide adduct. Shape-memory properties of the networks are compared in terms of DielsAlder adduct stability. Both materials exhibit excellent fixity and recovery ratios, but the relatively low retro DielsAlder temperature of the furanmaleimide adduct perturbs the mechanical stability of the network during cyclic tensile testing between 0 and 60 degrees C, whereas the anthracenemaleimide adduct is shown to be stable up to 150 degrees C.