Scale of Homogeneous Mixingin Miscible Blends of Organosolv LigninEsters with Poly(ψ-caprolactone)
Scale of Homogeneous Mixingin Miscible Blends of Organosolv LigninEsters with Poly(ψ-caprolactone)
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有机溶剂木质素酯与聚(ψ-己内酯)的可混溶混合物中的均匀混合规模
DOI：
10.1080/02773811003714194
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
and Y. Nishio
中科院分区：
文献类型：
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作者：
Y. Teramoto;S. H. Lee;T. Endo;and Y. Nishio
有机溶剂木质素（OSL）酯（侧链碳数，n= 3,4,5）已被证明与聚（ϵ-caprolactone） （PCL）在尺度（20-30 nm）上可混溶，用于通过差示扫描量热法（Polym）检测玻璃化转变温度（Tg）。J.2009, 41(3), 219-227。采用动态力学分析（DMA）和固态核磁共振（NMR）对丙酸OSL (osll - pr,n= 3)/PCL和丁酸OSL (osll - bu,n= 4)/PCL共混物进行了进一步的均匀性定量。DMA揭示了这些混合样品的成分依赖性，这意味着在≤15 nm的尺度上实现了成分的密切混合。利用固体核磁共振测量质子自旋-晶格弛豫时间（T1ρH），估计共混物在~ 6 nm尺度上基本均匀。但ols - pr /PCL组分的t1 ρ h均衡性不显著；也就是说，ols - pr /PCL的组分之间的互溶相对不完全。
Organosolv lignin (OSL) esters (side-chain carbon number,n= 3, 4, and 5) have been demonstrated to be miscible with poly(ϵ-caprolactone) (PCL) on a scale (20–30 nm) for detecting glass transition temperature (Tg) by differential scanning calorimetry (Polym. J.2009, 41(3), 219–227). Further precise quantification of homogeneity was conducted for the OSL propionate (OSL-Pr,n= 3)/PCL and OSL butyrate (OSL-Bu,n= 4)/PCL blends by means of dynamic mechanical analysis (DMA) and solid-state nuclear magnetic resonance (NMR). DMA revealed a composition-dependentTgfor these blend samples, which implies the attainment of an intimate mixing of the ingredients on a scale of ≤15 nm. From the measurements of proton spin-lattice relaxation times (T1ρH) using solid-state NMR, the blends were estimated to be substantially homogeneous on a scale of ∼6 nm. But the equalization of theT1ρHfor the components of OSL-Pr/PCL was not remarkable; that is, the constituents of OSL-Pr/PCL were relatively imperfectly miscible with each other.