1997年10月
Xe-129 nmr study of free volume and phase separation of the polystyrene/poly(vinyl methyl ether) blend
POLYMER
- ,
- ,
- 巻
- 38
- 号
- 21
- 開始ページ
- 5475
- 終了ページ
- 5480
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/S0032-3861(97)00086-4
- 出版者・発行元
- ELSEVIER SCI LTD
The polystyrene/poly(vinyl methyl ether) (PS/PVME) blend is studied by ID and 2D Xe-129 n.m.r. The signal of Xe dissolved in miscible PS/PVME blends exhibits a single peak, and the chemical shift shows non-linear dependence on the PVME content. The observed dependence is explained by the decrease of the total volume of the blend with the increasing PVME content. In the blend heated above the lower critical solution temperature, the single Xe-129 peak splits into two peaks, which can be ascribed to the PS-rich and PVME-rich phases. The observed chemical shifts of a phase-separated blend provide the component ratios of each separated phase at the initial stage. Further, 2D exchange Xe-129 n.m.r. measurements for the phase-separated blends heat-treated for various periods are performed to determine the average domain sizes of the PS-rich and PVME-rich phases. (C) 1997 Elsevier Science Ltd.
- リンク情報
- ID情報
-
- DOI : 10.1016/S0032-3861(97)00086-4
- ISSN : 0032-3861
- J-Global ID : 200902116546666018
- Web of Science ID : WOS:A1997XV81400030