首页> 外文期刊>Langmuir >Aggregation Behaviors of PEO-PPO-ph-PPO-PEO and PPO-PEO-ph-PEO-PPO at an Air/Water Interface: Experimental Study and Molecular Dynamics Simulation
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Aggregation Behaviors of PEO-PPO-ph-PPO-PEO and PPO-PEO-ph-PEO-PPO at an Air/Water Interface: Experimental Study and Molecular Dynamics Simulation

机译:PEO-PPO-ph-PPO-PEO和PPO-PEO-ph-PEO-PPO在空气/水界面的聚集行为:实验研究和分子动力学模拟

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摘要

The block polyethers PEO-PPO-ph-PPO-PEOn(BPE) and PPO-PEO-ph-PEO-PPO (BEP) are synthesized bynanionic polymerization using bisphenol A as initiator.nCompared with Pluronic P123, the aggregation behaviors ofnBPE and BEP at an air/water interface are investigated by thensurface tension and dilational viscoelasticity. The molecularnconstruction can influence the efficiency and effectiveness ofnblock polyethers in decreasing surface tension. BPE has thenmost efficient ability to decrease surface tension of waternamong the three block polyethers. The maximum surface excess concentration (Γmax) of BPE is larger than that of BEP or P123.nMoreover, the dilational modulus of BPE is almost the same as that of P123, but much larger than that of BEP. The molecularndynamics simulation provides the conformational variations of block polyethers at the air/water interface.
机译:嵌段聚醚PEO-PPO-ph-PPO-PEOn(BPE)和PPO-PEO-ph-PEO-PPO(BEP)是通过双酚A为引发剂通过阴离子聚合反应合成的。然后通过表面张力和膨胀粘弹性研究空气/水界面。分子结构可以影响嵌段聚醚降低表面张力的效率和效果。 BPE具有降低三嵌段聚醚中水的表面张力的最有效能力。 BPE的最大表面过剩浓度(Γmax)大于BEP或P123。n此外,BPE的膨胀模量几乎与P123相同,但比BEP的大。分子动力学模拟提供了空气/水界面处嵌段聚醚的构象变化。

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  • 来源
    《Langmuir》 |2012年第38期|13590-13600|共11页
  • 作者单位

    †Key Laboratory of Colloid and Interface Chemistry Ministry of Education Shandong University Jinan 250100 P. R. China‡College of Petroleum Engineering China University of Petroleum (East China) Qingdao 266580 P. R. China;

    Technology Research Department State Key Laboratory of Offshore Oil Exploitation CNOOC Research CenterBeijing 100027 P.R. China;

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