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The effect of grafting density and side chain length on the conformation of PEG grafted bottlebrush polymers
Reactive & Functional Polymers ( IF 5.1 ) Pub Date : 2020-09-20 , DOI: 10.1016/j.reactfunctpolym.2020.104736
Lifen Xiao , Jie Li , Gang Peng , Geng Huang

PEG grafted polymers are a kind of promising materials, and widely applied in polymer electrolytes, lubricants, biotechnology and biomedical science. While up to now, systematical researches of the relationship between architecture and conformation of PEG grafted polymers are very rare. Here, we efficiently and successfully prepared a series of PEG grafted polymers with different grafting density, and side chain length by combining ring-opening metathesis polymerization (ROMP) and Copper-catalyzed azide-alkyne cycloaddition (CuAAC) reaction, and then characterized the conformations of the synthesized bottlebrush polymers by AFM technique. The AFM images showed that all the polymers P(NB-alkyne)400-g-PEG with low grafting density were spherical morphology, while the polymers P(NB-2alkyne)400-g-PEG and P(NB-4alkyne)394-g-PEG presented cylindrical morphology, which indicated that only grafting density could determine the shape of the prepared PNB-g-PEG bottlebrush polymers. While, the side chain length could affect the size of prepared PEG grafted bottlebrush polymers.



中文翻译:

接枝密度和侧链长度对PEG接枝牙刷聚合物构象的影响

PEG接枝聚合物是一种很有前途的材料,广泛应用于聚合物电解质,润滑剂,生物技术和生物医学领域。到目前为止,对PEG接枝聚合物的结构和构象之间的关系的系统研究还很少。在这里,我们通过结合开环易位聚合反应(ROMP)和铜催化的叠氮化物-炔烃环加成反应(CuAAC),成功并成功地制备了一系列接枝密度和侧链长度不同的PEG接枝聚合物,然后对其构象进行了表征原子力显微镜技术制备合成的牙刷聚合物 AFM图像显示,所有聚合物P(NB-炔)400 - g低接枝密度的PEG为球形,而P(NB-2炔烃)400 - g -PEG和P(NB-4炔烃)394 - g -PEG为圆柱状,表明只有接枝密度才能决定其形状。制备的PNB- g- PEG瓶刷聚合物的制备。同时,侧链长度可能影响所制备的PEG接枝的牙刷聚合物的尺寸。

更新日期:2020-09-23
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