Dispersion of multiwall carbon nanotubes in blends of polypropylene and acrylonitrile butadiene styrene
Dispersion of multiwall carbon nanotubes in blends of polypropylene and acrylonitrile butadiene styrene
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DOI：
10.1002/pen.21985
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发表时间：
2011-09
影响因子：
3.2
通讯作者：
R. A. Khare;A. Bhattacharyya;A. Panwar;S. Bose;A. Kulkarni
中科院分区：
文献类型：
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作者：
R. A. Khare;A. Bhattacharyya;A. Panwar;S. Bose;A. Kulkarni
通过紫外-可见光谱、动态光散射和溶液实验研究了纯化的多壁碳纳米管（p-MWNT）在中性MWNT（n-MWNT）存在下的分散状态。拉曼光谱分析表明，在水溶液中的n-MWNT的存在下，p-MWNT的解束是持久的，即使在固体混合物中，这是由透射电子显微镜分析支持。在水溶液中存在n-MWNT的情况下，p-MWNT的改善分散性背后的所提出的机制是基于带负电荷的n-MWNT之间的静电排斥。通过拉曼光谱分析、体积电导率测量、溶液实验和结晶研究，研究了p-MWNT在45/55聚丙烯/丙烯腈-丁二烯-苯乙烯（PP/ABS）共混物中的分散状态。拉曼光谱分析表明，随着混合物中n-MWNT含量的增加，MWNT的分散状态得到改善。这种策略导致了显着增加的体积电导率的45/55 PP/ABS共混物在3重量%的MWNT含量，并强烈依赖于在混合物中的n-MWNT的浓度。差示扫描量热法测量沿着与溶液实验揭示了随后的迁移MWNT从PP相的ABS相的共混物在熔融混合过程中，在较高分数的n-MWNT的存在下。Polym.工程索引，2011.© 2011年塑料工程师协会
State of dispersion of purified multiwall carbon nanotubes (p-MWNT) in the presence of neutralized MWNT (n-MWNT) in aqueous solution was assessed through UV–Visible spectroscopy, dynamic light scattering measurements, and solution experiments. Raman spectroscopic analysis revealed that debundling of p-MWNT in the presence of n-MWNT in aqueous solution was persistent even in the solid mixture, which was supported by transmission electron microscopic analysis. The proposed mechanism behind the improved dispersion of p-MWNT in the presence of n-MWNT in aqueous solution has been based on the electrostatic charge repulsion between negatively charged n-MWNT. The state of dispersion of p-MWNT in the presence of n-MWNT in 45/55 polypropylene/acrylonitrile butadiene styrene (PP/ABS) blends was assessed through Raman spectroscopic analysis, bulk electrical conductivity measurements, solution experiment, and crystallization studies. Raman spectroscopic analysis indicated that the state of dispersion of MWNT was improved with increasing n-MWNT content of the mixture. This strategy led to a remarkable increase in the bulk electrical conductivity of 45/55 PP/ABS blends at 3 wt% MWNT content and was strongly dependent on the concentration of n-MWNT in the mixture. Differential scanning calorimetric measurements along with solution experiments revealed the subsequent migration of MWNT from the PP phase to the ABS phase in the blends during melt-mixing in the presence of higher fraction of n-MWNT. POLYM. ENG. SCI., 2011. © 2011 Society of Plastics Engineers