Crystallization, melting and morphology of PEO in PEO/MWNT-g-PMMA blends

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• 作者：Yeong-Tarng Shieh ; Gin-Lung Liu ; Kuo Chu Hwang and Chia-Chun Chen
• 关键词：Carbon nanotubes ; Polymer composites ; Crystallization
• 刊名：Polymer
• 出版年：2005
• 期刊代码：83_00323861
• 类别：ms
• 出版时间：2005
• 卷：46
• 期：24
• 页码：10945-10951
• 文件大小：270 K

摘要

The dispersion of multi-walled carbon nanotubes (MWNTs) in crystalline poly(ethylene oxide) (PEO) is significantly improved by grafting with poly(methyl methacrylate) (PMMA) on surface of MWNTs via emulsion reactions. The synthesized MWNTs-g-PMMA is soluble in solvents that can dissolve PMMA and is well dispersed in PEO. The effects of the MWNTs-g-PMMA on PEO crystallization and its use as a reinforcement for PEO are investigated using DMA, DSC, POM, and SAXS. DMA data show that the PEO/MWNTs-g-PMMA blends containing up to 30 wt%MWNTs-g-PMMA are compatible. DSC data show the crystallization of PEO is enhanced by the MWNTs-g-PMMA, accompanying with a decreased thickness of crystal layers and an increased thickness of amorphous layers of the PEO lamellar stacks, in combination with SAXS data.