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首页> 外文期刊>The journal of physical chemistry, C. Nanomaterials and interfaces >Poly(vinyl chloride)/Multiwalled Carbon Nanotube Nanocomposites: Effect of the Tacticity Distribution on the Polymer/Nanofiller Interface
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Poly(vinyl chloride)/Multiwalled Carbon Nanotube Nanocomposites: Effect of the Tacticity Distribution on the Polymer/Nanofiller Interface

机译：聚氯乙烯/多壁碳纳米管纳米复合材料：规整度分布对聚合物/纳米填料界面的影响

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摘要

The preparation and characterization of nanocomposites of poly(vinyl chloride) (PVC) of different tacticity with alkyl-modified multiwalled nanotubes (eMWNTs) is reported. Evidence from FTIR and thermal degradation measurements suggests that at the polymer—nanofiller interface specific isotactic conformations in the PVC chains are the preferred sites for the accommodation of eMWNTs through halogen bonding interactions, C—O—Cl—C. The differences between the IR intensity ratio I_(614)/I_(635) (related to the syndio/ isotactic distribution) observed for the nanocomposite and the polymer increase as the isotactic content increases as a result of interaction with the nanotubes, which reduces the distribution of the isotactic conformation in the polymer matrix. Further, the improvements in thermal stability of the nanocomposites with respect to the pure polymer increase with the isotactic content since the eMWNT restricts mobility of the labile g+ttg— conformation especially located at the end of long isotactic sequences.
机译：报道了不同规整度的聚氯乙烯（PVC）与烷基改性的多壁纳米管（eMWNTs）的纳米复合材料的制备和表征。 FTIR和热降解测量的证据表明，在聚合物-纳米填料界面上，PVC链中特定的等规构象是通过卤素键相互作用C-O-Cl-C容纳eMWNT的优选位点。纳米复合材料与聚合物观察到的IR强度比I_（614）/ I_（635）（与间规/等规分布有关）之间的差异随着与纳米管相互作用的等规含量的增加而增加，从而降低了等规构象在聚合物基质中的分布。此外，由于eMWNT限制了不稳定的g + ttg-构象的可移动性，特别是位于长等规序列的末端，因此相对于纯聚合物，纳米复合物相对于纯聚合物的热稳定性提高。

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