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纳米充电聚丙烯的应用：增强耐久性的现实前景。

Nano-Charged Polypropylene Application: Realistic Perspectives for Enhancing Durability.

作者信息

Naddeo Carlo, Vertuccio Luigi, Barra Giuseppina, Guadagno Liberata

机构信息

Department of Industrial Engineering University of Salerno Via Giovanni Paolo II, 132-84084 Fisciano (SA), Italy.

出版信息

Materials (Basel). 2017 Aug 14;10(8):943. doi: 10.3390/ma10080943.

DOI:10.3390/ma10080943
PMID:28805728
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5578309/
Abstract

Isotactic polypropylene/multi-walled carbon nanotube (iPP/MWCNTs) films have been exposed to accelerated weathering in a UV device for increasing times. The effect of UV irradiation on the structural and chemical changes has been investigated. The resistance to accelerated photooxidation of (iPP/MWCNTs) films has been compared to the photooxidation behaviour of unfilled polypropylene films with the same structural organization. The chemical and structural modifications resulting from photooxidation have been followed using infrared spectroscopy, calorimetric and diffractometric analysis. MWCNTs embedded in the polymeric matrix are able to strongly contrast the degradation mechanisms and the structural and morphological rearrangements caused by the UV treatment on the unfilled polymer. MWCNTs determine an induction period (IP) before the increase of the carbonyl and hydroxyl groups. The extent of the IP is strictly correlated to the amount of MWCNTs. The low electrical percolation threshold (EPT) and the electrical conductivity of the nanocomposites, together with their excellent thermal and photooxidative stability, make them promising candidates to fulfill many industrial requirements.

摘要

等规聚丙烯/多壁碳纳米管（iPP/MWCNTs）薄膜在紫外线设备中进行了不同时长的加速老化处理。研究了紫外线辐照对其结构和化学变化的影响。将（iPP/MWCNTs）薄膜的加速光氧化抗性与具有相同结构组织的未填充聚丙烯薄膜的光氧化行为进行了比较。利用红外光谱、量热分析和衍射分析跟踪了光氧化引起的化学和结构变化。嵌入聚合物基体中的多壁碳纳米管能够强烈抑制未填充聚合物因紫外线处理而引发的降解机制以及结构和形态重排。多壁碳纳米管在羰基和羟基增加之前确定了一个诱导期（IP）。诱导期的长短与多壁碳纳米管的含量密切相关。纳米复合材料的低导电渗流阈值（EPT）和电导率，以及它们优异的热稳定性和光氧化稳定性，使其成为满足许多工业需求的有前途的候选材料。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/86f6/5578309/14974763f405/materials-10-00943-g017.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/86f6/5578309/14974763f405/materials-10-00943-g017.jpg

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