Langmuir-Blodgett ultrathin membranes of fumarate polymers
Langmuir-Blodgett ultrathin membranes of fumarate polymers
复制标题
富马酸酯聚合物的 Langmuir-Blodgett 超薄膜
DOI：
10.1021/ja00238a038
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发表时间：
1987
影响因子：
15
通讯作者：
A. Yamada
中科院分区：
文献类型：
--
作者：
K. Shigehara;M. Hara;H. Nakahama;S. Miyata;Y. Murata;A. Yamada
60-(4 X 104 5)，极易溶于氯仿、THF、苯等常见有机溶剂。它们具有刚性棒状结构、高玻璃化转变温度（Tg> 200 C dec）、2'6和高热稳定性。图1显示了这些聚合物在21℃纯水亚相上的表面压力面积（FA）等温线。对应于固体膜形成的陡峭倾斜部分和膜塌陷点的高表面压力表明这些聚合物在LB膜制造中的多功能性。富马酸残基的极限分子面积约为PDPF、PDBF 和 PDHF 分别为 32、34 和 38 Á2。这些朗缪尔膜可以通过垂直浸渍（VD）或水平提升（HL）方法在20±5 dyn/cm的表面压力下转移到固体基质表面。传输率在误差限度内基本一致。当基板的临界表面张力小于30dyn/cm时，可以使用VD方法。当使用HL方法时，无论基板的种类如何，LB膜都很容易制备。补充 (1)(a) 东京农业科技大学系统工程系，Tokyo 184, Japan，(b) 日本油脂公司筑波实验室。有限公司，茨城县 300-26，日本。(2) 丰田，北卡罗来纳州；大津，T.J.Macromol。科学化学。 1983，A19，1011。（3）山田，K.；高柳，M.； Murata，Y.Rep.Polym。物理。日本。 1984, 27, 321。
60-(4 X 104 5), which are highly soluble in common organic solventssuch as chloroform, THF, benzene, etc. They are known to have a rigid rodlike structure, a high glass transition temperature (Tg> 200 C dec), 2'6 and high thermal stability. In Figure 1 are illustrated the surface pressure-area (FA) isotherms of these polymers on a pure water subphase at 21 C. The steep inclining part correspondingto the solid membrane formation and the high surface pressure of the mem-brane collapsing point indicate the versatility of these polymers in the fabrication of LB membranes. The limiting molecular area for the fumarate residue is ca. 32, 34, and 38 Á2 for PDPF, PDBF, and PDHF, respectively. These Langmuir membranes could be transferred to solid substrate surfaces either by the vertical dipping (VD) or horizontal lifting (HL) method at the surface pressure of 20±5 dyn/cm. The transfer ratio was essentially unity within the limit of error. The VD method was utilizable when the critical surface tension of the substrate plate was smaller than 30 dyn/cm. When the HL method was used, the LB membranes were easily prepared, regardless of the kind of substrate plate. The addition (1)(a) Department of System Engineering, Tokyo University of Agri-culture and Technology, Tokyo 184, Japan,(b) The Tsukuba Laboratory of Nippon Oil & FatsCo. Ltd., Ibaraki 300-26, Japan.(2) Toyoda, N.; Ohtsu, T. J. Macromol. Sci.-Chem. 1983, A19, 1011.(3) Yamada, K.; Takayanagi, M.; Murata, Y. Rep. Polym. Phys. Jpn. 1984, 27, 321.