Study on bulk preparation and properties of click chemistry end-crosslinked copolyether elastomers
Study on bulk preparation and properties of click chemistry end-crosslinked copolyether elastomers
复制标题
点击化学末端交联共聚醚弹性体的本体制备及性能研究
DOI：
10.1016/j.eurpolymj.2016.03.009
复制
发表时间：
2016-05
影响因子：
6
通讯作者：
Yang Rongjie
中科院分区：
文献类型：
--
作者：
Zhai Jinxian;Zhang Ning;Guo Xiaoyan;He Jiyu;Li Dinghua;Yang Rongjie
通过环氧乙烷-四氢呋喃共聚物（PET）的端部旋盖改性，制备了叠氮化物端部环氧乙烷-四氢呋喃共聚物（ATPET）。FTIR和13c NMR结果表明，PET末端羟基被彻底取代，得到了理论叠氮化物含量为0.464 mmol g−1的目标产物ATPET。与PET相比，ATPET具有较低的粘度。以三丙胺为交联剂，通过体块反应制备了具有不同功能摩尔比(R)的弹性体。力学试验表明，随着R的增加，弹性体的力学性能与R呈抛物线关系，膨胀试验表明，弹性体有效弹性链的表观分子量随R的增加先减小后增大。动态力学分析（DMA）表明，弹性体的玻璃化转变温度约为- 66℃。当R < 1.0时，弹性体中形成悬链，导致更高的耗散系数tanδ。将溶胀与DMA相结合，建立了弹性体的网络模型。此外，还对弹性体的热稳定性进行了研究。
Azide terminated ethylene oxide-tetrahydrofuran copolymer (ATPET) has been prepared through ethylene oxide-tetrahydrofuran copolymer (PET) end-capping modification. The FTIR and13C NMR results indicate that the PET terminal hydroxyl was thoroughly replaced and yielded the target product ATPET with a theoretical azide content of 0.464 mmol g−1. In comparison with PET, ATPET has lower viscosity. Using tripropargylamine as a cross-linker, elastomers with various functional molar ratios (R) were prepared by bulk CuAAC reaction. Mechanical tests indicate that with the increase in R, the mechanical properties exhibit a parabolic dependence on R. Swelling tests demonstrate that the apparent molecular weight of the elastomer effective elastic strands first decreases and subsequently increases with the increase in R. The dynamic mechanical analysis (DMA) reveals that the glass transition temperature of the elastomers is approximately −66 °C. When R < 1.0, dangling strands are formed in the elastomers and cause a higher dissipation factor tanδ. Combined swelling with DMA, the network model of the elastomers is depicted. In addition, the elastomer thermal stability has also been studied.
登录
查看更多内容
影响因子：
4.6
作者：
Benedict Sandmann;Bobby Happ;J. Vitz;M. Hager;P. Burtscher;N. Moszner;U. Schubert
通讯作者：
Benedict Sandmann;Bobby Happ;J. Vitz;M. Hager;P. Burtscher;N. Moszner;U. Schubert
影响因子：
3.8
作者：
N. Karakuş;M. Demirel
通讯作者：
N. Karakuş;M. Demirel
影响因子：
29.4
作者：
Gong, Tao;Adzima, Brian J.;Bowman, Christopher N.
通讯作者：
Bowman, Christopher N.
影响因子：
3.9
作者：
Van Krevelen
通讯作者：
Van Krevelen
影响因子：
15
作者：
Himo, F;Lovell, T;Fokin, VV
通讯作者：
Fokin, VV