Role of adsorbed chain rigidity in reinforcement of polymer nanocomposites

Role of adsorbed chain rigidity in reinforcement of polymer nanocomposites
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吸附链刚性在聚合物纳米复合材料增强中的作用

DOI:
10.1002/polb.24751
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发表时间:
2018
期刊:
Journal of Polymer Science Part B: Polymer Physics
影响因子:
--
通讯作者:
Akcora, Pinar
Akcora, Pinar
中科院分区:
--
文献类型:
--
作者:
Yang, Siyang;Hassan, Mohammed;Akcora, Pinar

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聚合物纳米复合材料的热机械行为主要取决于颗粒-聚合物相互作用、颗粒负载和分散状态的界面性质。我们最近发现,聚(甲基丙烯酸甲酯)(PMMA)吸附在聚(环氧乙烷)(PEO)矩阵的纳米粒子表现出不寻常的热硬化响应。这种独特的硬化行为的分子起源是由于增强的PEO流动性内的玻璃状PMMA链吸附在纳米粒子。此外,动态不对称性和化学不均匀性存在于颗粒周围的界面层中,以提高增强复合材料作为良好的链间混合的结果。在这里,链刚性的作用,在这种界面控制的PEO复合材料的增强进行了研究。我们发现,吸附刚性较低的聚合物颗粒提高复合材料的机械性能。© 2018 Wiley Periodicals,Inc. J.波利姆科学,部分B:聚合物物理2019,57,9-14
The thermomechanical behavior of polymer nanocomposites is mostly governed by interfacial properties which rely on particle–polymer interactions, particle loading, and dispersion state. We recently showed that poly(methyl methacrylate) (PMMA) adsorbed nanoparticles in poly(ethylene oxide) (PEO) matrices displayed an unusual thermal stiffening response. The molecular origin of this unique stiffening behavior resulted from the enhanced PEO mobility within glassy PMMA chains adsorbed on nanoparticles. In addition, dynamic asymmetry and chemical heterogeneities existing in the interfacial layers around particles were shown to improve the reinforcement of composites as a result of good interchain mixing. Here, the role of chain rigidity in this interfacially controlled reinforcement in PEO composites is investigated. We show that particles adsorbed with less rigid polymers improve the mechanical properties of composites. © 2018 Wiley Periodicals, Inc. J. Polym. Sci., Part B: Polym. Phys.2019,57, 9–14
聚合物纳米复合材料中的可逆热硬化。
DOI: 10.1021/acsami.5b02046
发表时间: 2015
影响因子: 9.5
作者:
Erkan Şenses;A. Isherwood;Pinar Akcora
通讯作者: Pinar Akcora
将毛状纳米粒子分散在聚合物熔体中
DOI: --
发表时间: 2008
期刊:
影响因子: --
作者:
Xiaorong Wang;V. J. Foltz;M. Rackaitis;G. Bohm
通讯作者: G. Bohm