Evaluation of different catalyst systems for bulk polymerization through "click" chemistry
Evaluation of different catalyst systems for bulk polymerization through "click" chemistry
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DOI：
10.1016/j.polymer.2011.07.018
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发表时间：
2011-09-12
期刊：
影响因子：
4.6
通讯作者：
Kessler, Michael R.
中科院分区：
文献类型：
--
作者：
Sheng, Xia;Rock, Darman M.;Kessler, Michael R.
“点击”化学是聚合物化学中一种常用的技术，用于偶联聚合物端基以构建新的共聚物结构，并作为一种步长聚合技术。在本研究中，通过铜催化的炔叠氮1，3-环加成反应(CuAAC)，在均相催化剂Cu(PPh3)(3)Br2+和多相CuC催化剂上实现了双炔和双叠氮化物的本体聚合。用示差扫描量热法(DSC)和振荡流变学研究了不同催化剂体系对“点击”聚合反应动力学的影响。此外，用温升振荡流变学和热重法评价了聚合物的热机械性能和热稳定性。(C)2011爱思唯尔有限公司。保留所有权利。
"Click" chemistry is a frequently used technique in polymer chemistry for coupling polymer end groups to construct novel copolymer architectures and as a step-growth polymerization technique. In this study, the bulk polymerization of a diyne and a bisazide were achieved through the copper-catalyzed alkyne-azide 1,3-cycloaddition (CuAAC) with different catalysts, including the homogeneous catalyst Cu(PPh3)(3)Br and a heterogeneous Cu/C catalyst. The effects of different catalyst systems on the kinetics of the "click" polymerization were evaluated by differential scanning calorimetry (DSC) and oscillatory rheology. Additionally, the thermomechanical properties of resulting polymers were evaluated by temperature-ramp oscillatory rheology and thermal stabilities by thermogravimetry. (C) 2011 Elsevier Ltd. All rights reserved.