標題: Miscibility and hydrogen bonding in blends of poly(vinylphenol-co-methyl methacrylate) with poly(ethylene oxide)
作者: Kuo, SW
Chang, FC
應用化學系
Department of Applied Chemistry
公開日期: 5-六月-2001
摘要: Blends of poly(vinylphenol-co-methyl methacrylate) (PVPh-co-PMMA) with poly(ethylene oxide) (PEO) were prepared by solution casting from tetrahydrofuran (THF) solution. The miscibility behavior and hydrogen bonding of blends were investigated by differential scanning calorimetry (DSC), Fourier transform infrared spectroscopy (FTIR), and solid-state nuclear magnetic resonance (NMR). Experimental results indicate that PEO was miscible with PVPh-co-PMMA as shown by the existence of single composition-dependent glass transition temperatures over the entire composition range by DSC. In addition, a negative polymer-polymer interaction energy density "B" was calculated based on the melting depression of PEO using the Nishi-Wang equation. Solid-state NMR reveals single-exponential decay of proton spin-lattice relaxation times in the rotating frame (T-1p(H)) in the amorphous PVPh-co-PMMA phase. Furthermore, FTIR and solid-state NMR results reveal that at least three competing equilibria are present in the blend; self-association of PVPh-co-PMMA copolymer (hydroxyl-hydroxyl and hydroxyl-carbonyl) and hydroxyl-ether interassociation between PVPh and PEG. Quantitative results show that although the hydroxyl-ether interassociation is favored at room temperature, the hydroxyl-carbonyl self-association dominate's at higher temperatures (> 70 degreesC). The Painter-Coleman association model (PCAM) can predict three interacting functional groups based on our experimental results at various temperatures.
URI: http://dx.doi.org/10.1021/ma010047k
http://hdl.handle.net/11536/29574
ISSN: 0024-9297
DOI: 10.1021/ma010047k
期刊: MACROMOLECULES
Volume: 34
Issue: 12
起始頁: 4089
結束頁: 4097
顯示於類別:期刊論文


文件中的檔案:

  1. 000169049000042.pdf

若為 zip 檔案,請下載檔案解壓縮後,用瀏覽器開啟資料夾中的 index.html 瀏覽全文。