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A Survey on High Performance Lubricants for Continuous-Magnetic Recording Media in Application of Functional Inorganic Polymers

功能无机聚合物连续磁记录介质高性能润滑剂的应用综述

基本信息

批准号：
03650244
负责人：
MASUKO Toru
金额：
$ 1.22万
依托单位：
Yamagata University
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (C)
财政年份：
1991
资助国家：
日本
起止时间：
1991 至 1992
项目状态：
已结题

项目摘要

In order to obtain high performance-lubricant materials for continuous magnetic recording media, new types of polyorganophosphazene copolymers have been synthesized and characterized materially. These polyorganophosphazenes contain both anchor substituents and lubricant functional groups attached to the phosphorous atoms in backbone chains. One of the copolymer series examined is poly[(p-methylphenoxy)(trifluoroethoxy)phosphazene] (F-P series); the other is poly[(3,4-dimethylphenoxy)(trifluoroethoxy)phosphazene] (F-dM series). These copolymers were obtained via solution polymerization of hexachlorocyclotriphosphazene. Elemental analysis and GPC measurements for these copolymers were carried out to characterize these materials.Completely-amorphous copolymers are necessary for the lubricant designed here. The polyorganophosphazenes were limitedly found to be amorphous in the chemical composition of ca. 50 mol% p-methylphenoxy substituent; their crystal/mesophase transitions almost disapp … More ered in the copolymer composition of 50 mole% of trifluoroethoxy residures. This situation is quite similar in both the F-P and F-dM cases.Grass transition temperatures, Tg's, of the copolymers were determined by a DSC equipment. The Tg's obtaied showed to change linerly as a function of trifluoroethoxy content; this feature was exactly expressed by the Gordon-Taylor equation.The copolymers obtained were disolved in THF solvent, and coated on metal Si substrates using a spin coater. The thickness of the thin layer was to be ca. 0.5 mum. The contact angles of various solvents against the copolymer thin films were measured by a contangle meter. Hydrophobicity of the thin layer increased with an increase in trifluoroethoxy contents. This suggests that lubricity of the copolymer depends strongly on the functional groups introduced to polyphosphazenene. The F-P series was more effective in hydrobobicity than the F-dM series.Occasionally we have determined the exact lattice constants of poly[bis(p-methylphenoxy)- phosphazene] and poly[bis(3,4-dimethylphenoxy)phosphazene] homopolymers. These results helped to consider the chain coformations within the adsorbed-polymer layer on the metal substrate.More works associated with frictional properties for the thin layer will be necessary in the future. Detailed examination for chain conformation in the layer is now in progress. Less

为了获得高性能的连续磁记录介质润滑材料，合成了新型聚有机磷腈共聚物，并对其进行了表征。这些聚有机腈含有与主链中的磷原子连接的锚取代基和润滑剂官能团。所研究的共聚物系列之一是聚[（对甲基苯氧基）（三氟乙氧基）磷腈]（F-P系列）;另一个是聚[（3，4-二甲基苯氧基）（三氟乙氧基）磷腈]（F-dM系列）。这些共聚物通过六氯环三磷腈的溶液聚合获得。通过元素分析和凝胶渗透色谱对共聚物进行了表征，发现共聚物为完全无定形的共聚物是所设计的润滑剂所必需的。聚有机磷腈的化学组成中有有限的无定形结构。50 mol%对甲基苯氧基取代基;它们的晶体/中间相转变几乎消失 ...更多信息在50摩尔%三氟乙氧基残基的共聚物组合物中使用。这种情况在F-P和F-dM的情况下非常相似。用DSC装置测定了共聚物的玻璃化转变温度Tg。所得共聚物的玻璃化转变温度（Tg）与三氟乙氧基含量呈线性关系，这一特性可用Gordon-Taylor方程精确表示。薄层的厚度为约100 μ m。0.5妈妈.用接触角仪测量了不同溶剂对共聚物薄膜的接触角。薄层的疏水性随着三氟乙氧基含量的增加而增加。这表明共聚物的润滑性强烈依赖于引入到聚磷腈中的官能团。F-P系列比F-dM系列具有更好的疏水性，我们偶尔测定了聚[双（对甲基苯氧基）磷腈]和聚[双（3，4-二甲基苯氧基）磷腈]均聚物的晶格常数。这些结果有助于考虑金属基底上吸附聚合物层内的链构象，未来还需要开展更多与薄层摩擦性能相关的工作。目前正在对该层中的链构象进行详细检查。少