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首页> 外文期刊>Journal of Applied Polymer Science >Role of the degree of acetalization on dynamic mechanical properties of polyvinyl butyral/carbon nanotube composites
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Role of the degree of acetalization on dynamic mechanical properties of polyvinyl butyral/carbon nanotube composites

机译：缩醛化程度对聚乙烯丁醛/碳纳米管复合材料的动态力学性能

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摘要

In this work, polyvinyl butyral (PVB) nanocomposites reinforced with 0.1-1.0 wt % of pristine [carbon nanotube (CNT)] or oxidized (CNTO) multiwalled CNTs were synthesized via in situ polymerization. It was found that the presence of the reinforcement during the synthesis altered the degree of acetalization of PVB. Dynamic mechanical analyses showed that PVB nanocomposites containing 0.5 wt % of pristine CNT had the best adhesion factor, with increases of about 30% in the storage modulus. On the other hand, PVB/CNTO 1.0 wt % nanocomposites achieved the best reinforcement efficiency factor ("C" coefficient). It is concluded that the in situ polymerization improves dispersion and final properties of the nanocomposite only if the nanoparticles are able to form relevant interfacial interactions during the PVB synthesis. In addition, it was verified that the presence of CNT or CNTO altered the degree of acetalization of PVB, which strongly influences the final properties of the nanocomposites. (c) 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 48146.
机译：在这项工作中，通过原位聚合通过0.1-1.0wt％加强含有0.1-1.0wt％的原始[碳纳米管（CNT）]或氧化（CNTO）多壁CNT的聚乙烯丁醛（PVB）纳米复合材料。发现在合成期间存在增强改变了PVB的缩醛化程度。动态机械分析表明含有原始CNT的0.5重量％的该纳米复合材料PVB具有最好的粘附因子，与所述储能模量的约30％增加。在另一方面，PVB / CNTO 1.0wt％的纳米复合材料取得的最好加强效率因子（“C”系数）。得出结论，如果纳米颗粒能够在PVB合成期间形成相关的界面相互作用，则原位聚合可以改善纳米复合材料的分散和最终性质。此外，验证了CNT或CNTO的存在改变了PVB的缩醛化程度，这强烈影响纳米复合材料的最终性质。 （c）2019 Wiley期刊，Inc.J.Phill。聚合物。 SCI。 2019,136,48146。

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