Poly(triazole) Glassy Networks via Thiol-Norbornene Photopolymerization: Structure–Property Relationships and Implementation in 3D Printing
Poly(triazole) Glassy Networks via Thiol-Norbornene Photopolymerization: Structure–Property Relationships and Implementation in 3D Printing
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通过硫醇-降冰片烯光聚合形成的聚（三唑）玻璃状网络：结构与性能之间的关系以及在 3D 打印中的实现
DOI：
10.1021/acs.macromol.1c00047
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发表时间：
2021
期刊：
影响因子：
5.5
通讯作者：
Bowman, Christopher N.
中科院分区：
文献类型：
--
作者：
Wang, Xiance;Hernandez, Juan J.;Gao, Guangzhe;Stansbury, Jeffrey W.;Bowman, Christopher N.
开发了以三唑嵌入降冰片烯单体为特征的光固化硫醇-降冰片烯树脂，光聚合网络在玻璃态下表现出良好至优异的延展性，断裂伸长率为 130% 至 290%，拉伸韧性高达 57 MJ/m3，证明了三唑在形成坚韧的玻璃态网络方面的价值。在环境温度下物理老化 24 小时后，观察到两个三唑/硫醇-降冰片烯网络保留了延展性，这可能是由于单轴应变下的机械再生，其中一个网络的断裂伸长率仅从 290% 下降至 170，而另一个网络的断裂伸长率保持不变。尽管在更长时间的物理老化后，两种网络都观察到显着的脆化，但在此观察到的延长延展性是以前在聚（三唑）玻璃状网络中未观察到的。最后，这里开发的一种三唑/硫醇-降冰片烯树脂成功应用于使用基于立体光刻的3D打印高精度制造三维（3D）结构，突出了硫醇-降冰片烯光聚合的稳健性。
Photocurable thiol-norbornene resins featuring triazole-embedded norbornene monomers were developed, and the photopolymerized networks showed good to superior ductility in the glassy state with elongation-at-break ranging from 130 to 290% and tensile toughness as high as 57 MJ/m3, demonstrating the value of triazoles in forming tough, glassy networks. Retained ductility was observed with two of the triazole/thiol-norbornene networks after physical aging at ambient temperature for 24 h, presumably due to mechanical rejuvenation under uniaxial straining, as the elongation-at-break of one of the networks decreased only to 170 from 290%, while the elongation-at-break of the other network remained the same. Though substantial embrittlement was observed for both networks after an even more extended time of physical aging, the prolonged ductility observed here was not previously seen with the poly(triazole) glassy networks. Finally, one of the triazole/thiol-norbornene resins developed here was successfully applied for fabricating three-dimensional (3D) structures in high precision using stereolithography-based 3D printing, highlighting the robustness of the thiol-norbornene photopolymerization.
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影响因子：
5
作者：
Lu, H;Stansbury, JW;Bowman, CN
通讯作者：
Bowman, CN
影响因子：
56.9
作者：
Tumbleston, John R.;Shirvanyants, David;DeSimone, Joseph M.
通讯作者：
DeSimone, Joseph M.
DOI：
--
发表时间：
1992
期刊：
Journal of dentistry research
影响因子：
--
作者：
C. Verzijden;A.J. Feilzeri;N. Creugers;C. Davidson
通讯作者：
C. Davidson
玻璃化对光聚合形成致密交联网络的影响
DOI：
--
发表时间：
1988
期刊：
影响因子：
--
作者：
J. Kloosterboer;G. Lijten
通讯作者：
G. Lijten
影响因子：
5.5
作者：
Jansen, BJP;Rastogi, S;Lemstra, PJ
通讯作者：
Lemstra, PJ