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首页> 外文期刊>Journal of Wood Chemistry and Technology >Scale of Homogeneous Mixing in Miscible Blends of Organosolv Lignin Esters with Poly(e-caprolactone)
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Scale of Homogeneous Mixing in Miscible Blends of Organosolv Lignin Esters with Poly(e-caprolactone)

机译：有机溶剂木质素与聚（ε-己内酯）混溶混合物的均相混合规模

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摘要

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 (T_g) 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-dependent T_g for 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 (T_(lp)~H) using solid-state NMR, the blends were estimated to be substantially homogeneous on a scale of ～6 nm. But the equalization of the T_(lp)~H for the components of OSL-Pr/PCL was not remarkable; that is, the constituents of OSL-Pr/PCL were relatively imperfectly miscible with each other.
机译：已证明有机溶剂木质素（OSL）酯（侧链碳数，n = 3、4和5）可与聚（ε-己内酯）（PCL）混溶，规模为（20-30 nm），用于检测玻璃差示扫描量热法测定的转变温度（T_g）（Polym.J.2009，41（3），219-227）。通过动态力学分析（DMA）和固态法对OSL丙酸酯（OSL-Pr，n = 3）/ PCL和OSL丁酸酯（OSL-Bu，n = 4）/ PCL共混物进行了更精确的均质性定量分析核磁共振（NMR）。 DMA显示这些掺混样品的成分依赖性T_g，这意味着可以达到≤15 nm的成分充分混合。根据使用固态NMR测得的质子自旋晶格弛豫时间（T_（lp）〜H），估计共混物在〜6 nm范围内基本均匀。但是对于OSL-Pr / PCL的分量，T_（lp）〜H的均衡并不明显。就是说，OSL-Pr / PCL的成分相互之间不能完全互溶。

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