Effect of multi‐walled carbon nanotubes on crystallization, thermal, and mechanical properties of poly(vinylidene fluoride)
Effect of multi‐walled carbon nanotubes on crystallization, thermal, and mechanical properties of poly(vinylidene fluoride)
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DOI：
10.1002/pc.20876
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发表时间：
2009-04
影响因子：
5.2
通讯作者：
Linghao He;Qun Xu;Cheng Hua;R. Song
中科院分区：
文献类型：
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作者：
Linghao He;Qun Xu;Cheng Hua;R. Song
采用溶液共混法制备了聚偏氟乙烯（PVDF）/多壁碳纳米管（MWNTs）复合材料。傅里叶变换红外光谱（FTIR）和X射线衍射（XRD）结果表明，MWNTs的加入改变了PVDF的结晶结构，证实了MWNTs诱导PVDF由α相向β相的晶型转变。采用差示扫描量热仪（DSC）和动态力学热分析（DMA）技术对复合膜的热性能和力学性能进行了研究。DSC结果表明，MWNTs的加入使复合材料的冷却结晶温度（Tc）升高，说明MWNTs纳米粒子具有成核作用，偏光显微镜照片进一步证实了这一点。另一方面，Dd（结晶度）的降低意味着MWNTs网络可以限制PVDF的结晶。通过对动态力学测试曲线的分析，发现PVDF/MWNTs复合材料的储能模量（E ′）显著提高，说明PVDF与MWNTs之间存在较强的相互作用。Polym.比较器：2010.© 2009年塑料工程师协会
Composites were prepared by solution blending poly(vinylidene fluoride) (PVDF) and multi-walled carbon nanotubes (MWNTs). Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction (XRD) results showed that the crystalline structure of PVDF was changed by the addition of MWNTs and a MWNTs-induced crystal transformation from α-phase to β-phase of PVDF was confirmed. With differential scanning calorimeter (DSC) and dynamic mechanic thermal analysis (DMA) techniques, thermal and mechanical properties of the composite films were examined. As the DSC results showed, addition of MWNTs would lead to the increased cooling crystallization temperature (Tc), implying that MWNTs nanoparticles could act as nucleating agents, which is further proved with the help of polarized optical microphotographs. On the other hand, the decreasing of Dd (degree of crystallinity) implied that the MWNTs networks can confine the crystallization of PVDF. Through the curve analysis of the dynamic mechanical measurements, it was found that the storage modulus (E′) is significantly enhanced, revealing that a strong interaction should exist between PVDF and MWNTs. POLYM. COMPOS., 2010. © 2009 Society of Plastics Engineers