Solid-State NMR Study of Miscibility and Phase-Separation of Polymer Blend: Polycarbonate/Poly(methyl methacrylate)
Solid-State NMR Study of Miscibility and Phase-Separation of Polymer Blend: Polycarbonate/Poly(methyl methacrylate)
复制标题
聚合物共混物的混溶性和相分离的固态核磁共振研究：聚碳酸酯/聚甲基丙烯酸甲酯
DOI：
10.1295/polymj.24.555
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发表时间：
1992
期刊：
影响因子：
2.8
通讯作者：
K. Hikichi
中科院分区：
文献类型：
--
作者：
A. Asano;K. Takegoshi;K. Hikichi
通过1H自旋-晶格弛豫行为研究了双酚A聚碳酸酯/聚甲基丙烯酸甲酯（PC/PMMA）共混体系的混相和相分离。通过高分辨率固态13C共振间接观测。发现共混物在200-300 Å的尺度上是均匀的，但在20-30 Å的尺度上是不均匀的。通过分析共混物在不同温度下加热30min的1H弛豫恢复曲线，得到相图。还观察了相分离动力学，并发现受旋量分解控制。
Miscibility and phase-separation of bisphenol A polycarbonate/poly(methyl methacrylate) (PC/PMMA) blend are studied by examining the 1H spin-lattice relaxation behavior. The observation is done indirectly through high-resolution solid-state 13C resonance. The blend is found to be homogeneous on a scale of 200–300 Å, but heterogeneous on a scale of 20–30 Å. The phase diagram is obtained by analyzing the recovery curve of 1H relaxation of the blends heated at various temperatures for 30 min. The kinetics of the phase-separation were also observed, and found to be governed by spinodal decomposition.