Non-isothermal crystallization of ethylene-vinyl acetate copolymer containing a high weight fraction of graphene nanosheets and carbon nanotubes
Non-isothermal crystallization of ethylene-vinyl acetate copolymer containing a high weight fraction of graphene nanosheets and carbon nanotubes
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含有高重量分数石墨烯纳米片和碳纳米管的乙烯-醋酸乙烯酯共聚物的非等温结晶
DOI：
10.1007/s10118-012-1170-y
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发表时间：
2012-05
影响因子：
4.3
通讯作者：
Chen, Chen
中科院分区：
文献类型：
--
作者：
Pang, Huan;Zhong, Gan-Ji;Xu, Jia-Zhuang;Yan, Ding-Xiang;Ji, Xu;Li, Zhong-Ming;Chen, Chen
研究了不同几何尺寸的二维石墨烯纳米片(2D GNSS)和一维碳纳米管(1D CNTs)在高负荷(5wt%)下对乙烯-乙酸乙烯酯(EVA)共聚物非等温结晶行为的影响。透射电子显微镜显示，通过溶液分散工艺得到的GNSS和CNTs在EVA中均匀分散。傅里叶变换红外光谱和差示扫描量热仪测试表明，一维碳纳米管和二维GNSS是有效的成核剂，EVA的起始结晶温度显著提高。高质量分数的纳米填料减缓了复合材料的整体结晶速度。在相同的结晶温度下，GNS/EVA复合材料的结晶行为比CNT/EVA复合材料慢，这是因为GNS/EVA复合材料具有较大的核势垒和扩散活化能。CNT/EVA和GNS/EVA复合材料的动态力学松弛和流变行为表明，由于纳米膜与聚合物链之间的相互作用以及空间限制，GNSS的平面结构对EVA链的迁移率有强烈的负面影响。
The effect of the different geometrical dimensionality of two dimensional graphene nanosheets (2D GNSs) and one dimensional carbon nanotubes (1D CNTs) on the non-isothermal crystallization of an ethylene-vinyl acetate (EVA) copolymer at high loading (5 wt%) was studied. Transmission electron microscopy indicated a homogeneous dispersion of GNSs and CNTs in EVA obtained by a solution dispersion process. Fourier-transform infrared spectroscopy and differential scanning calorimetry measurements showed that 1D CNTs and 2D GNSs acted as effective nucleating agents, with a noticeably increased onset crystallization temperature of EVA. A high weight fraction of nano-fillers slowed the overall crystallization rate of composites. At the same crystallization temperature, the crystallization behavior of GNS/EVA composites was slowed compared to that of the CNT/EVA ones owing to larger nucleus barrier and activation energy of diffusion. Dynamic mechanical relaxation and rheology behavior of CNT/EVA and GNS/EVA composites demonstrated that the planar structure of the GNSs had an intensively negative effect on EVA chain mobility due to interactions between nanofillers and polymer chains, as well as spatial restriction.
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DOI：
10.1016/j.ijbiomac.2005.10.006
发表时间：
2006-11
影响因子：
8.2
作者：
Jin-Jin Xie-Jin;Qing-Xi Chen;Ji-ping Zhang;Qin Wang;Xue Yang
通讯作者：
Jin-Jin Xie-Jin;Qing-Xi Chen;Ji-ping Zhang;Qin Wang;Xue Yang
氧化石墨烯的分散及其对环氧纳米复合材料的阻燃作用
影响因子：
4.3
作者：
通讯作者：
--
等规聚丙烯纳米复合材料中的石墨烯纳米片和剪切流诱导结晶
影响因子：
5.5
作者：
Xu, Jia-Zhuang;Chen, Chen;Wang, Yan;Tang, Hu;Li, Zhong-Ming;Hsiao, Benjamin S.
通讯作者：
Hsiao, Benjamin S.
影响因子：
64.8
作者：
Stankovich, Sasha;Dikin, Dmitriy A.;Ruoff, Rodney S.
通讯作者：
Ruoff, Rodney S.
影响因子：
4.6
作者：
P. Bertrand;A. Jonas;A. Laschewsky;R. Legras
通讯作者：
P. Bertrand;A. Jonas;A. Laschewsky;R. Legras