Preparation of PVA/Montmorillonite and PP/Montmorillonite Nanocomposite
碩士 === 國立海洋大學 === 食品科學系 === 91 === Nanocomposites of polypropylene (PP)/montmorillonite and poly(vinyl alcohol) (PVA)/montmorillonite were prepared by melt and solution intercalation, respectively. The extent of dispersion of montmorillonite in polymer matrix could be confirmed by X-ray diffraction...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2003
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| Online Access: | http://ndltd.ncl.edu.tw/handle/73869998160192102371 |
| Summary: | 碩士 === 國立海洋大學 === 食品科學系 === 91 === Nanocomposites of polypropylene (PP)/montmorillonite and poly(vinyl alcohol) (PVA)/montmorillonite were prepared by melt and solution intercalation, respectively. The extent of dispersion of montmorillonite in polymer matrix could be confirmed by X-ray diffraction (XRD). Cetylpyridinium chloride (CPC) was used to modify the montmorillonite, and the interlayer distance was increased to 2.21 nm after the ion exchange with the cation between CPC and montmorillonite. Un-modified montmorillonite mixed with PVA could form intercalated nanocomposite, and exfoliated nanocomposites after the montmorillonite modified by CPC. An intercalated nanocomposite was formed by mixing PVA with 15A montmorillonite, which was less hydrophilic than CPC montmorillonite. PP mixed with montmorillonite did not show intercalation. Both CPC Montmorillonite and 15A montmorillonite blended with PPMA (polypropylene graft maleic anhydride) and PP could form intercalated nanocomposites. The DSC (Differential Scanning Calorimeter) curve of PVA/montmorillonite nanocomposite showed two peaks of heat adsorption. Binding of PVA and montmorillonite exhibited higher melting point than the region where there was no binding.
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