Fine Structures and Phase Transitions in Polyorganophosphazene

聚有机磷腈的精细结构和相变

• 批准号: 63044019
• 负责人: MASUKO Toru
• 金额: $ 2.56万
• 依托单位: YAMAGATA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Overseas Scientific Survey.
• 财政年份: 1988
• 资助国家: 日本
• 起止时间: 1988 至 1989
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-63044019/
• 关键词: Poryorganophosphazene; Phase Transitions; Mesomorphic State; Single Crystal; Porymorphism; Lattice Constants; Crystallization Rate; Depolarization Light Intensity Method

We have investigated the following subjects at this International Scientific Research Program in two years.(1) Structural studies on annealing effects of poly[bis(p-fluorophenoxy)phosphazene] and poly[bis(p-chlorophenoxy)phosphazene] associated with polymorphism. These annealing effects are only observed in the temperature range higher than T(1) transition. In this study, we have determined the lattice constants of poly[bis(p-fluorophenoxy)phosphazene]. (2) Kinetic studies on transformations from the 2D meso state to the 3D crystalline state in various kinds of polyorganophosphazene ( sample thickness dependence or nucleation effects ). (3) Preparation of single crystals of poly[bis(p-methylphenoxy)phosphazene] and poly[bis(p-methylphenoxy)phosphazene and determination of their lattice constants by electron diffraction techniques. (4) Examinations of phase transitions in polyphosphazeness by an ultra sonic absorption method. Sonic velocity changes and absorption intensity changes have clearly been detected at 170 C in the T(1) range.Two subjects of these cooperative studies, (2) and (4), will be continued further in the next year. In this cooperation, wide varieties of mutual understandings between Japan and the United States have been experienced. We appreciate very much the Ministry of Education, who gave the chance to execute the International Research Program.

我们在两年的时间里对这个国际科研项目进行了以下的研究。(1)聚[双（对氟苯氧基）磷腈]和聚[双（对氯苯氧基）磷腈]的退火效应与多态性相关的结构研究。这些退火效应仅在高于T(1)转变的温度范围内观察到。在这项研究中，我们确定了聚[双（对氟苯氧基）磷腈]的晶格常数。(2)各种多有机磷腈从二维介观态向三维结晶态转变的动力学研究（样品厚度依赖或成核效应）。(3)聚[双（对甲基苯氧基）磷腈]和聚[双（对甲基苯氧基）磷腈单晶的制备，并用电子衍射技术测定了它们的晶格常数。(4)用超声波吸收法检测聚磷的相变。在170℃T(1)范围内，声速变化和吸收强度变化已被清楚地检测到。其中(2)及(4)两项合作研究的课题将于明年继续进行。在这种合作中，日美两国之间经历了各种各样的相互理解。我们非常感谢教育部给了我们执行国际研究项目的机会。

项目成果

Toru Masuko: "“Thermal behaviour of poly[bis(phenoxy)phosphazene]"" Polymer. 31. (1990)

Toru Masuko：“聚[双（苯氧基）磷腈]的热行为”聚合物。31。（1990）

Toru Masuko: "“Single Crystal of Poly[bis(pーfluorophenoxy)phosphazene]"" Journal Materials Science Letters. 7. 1023-1025 (1988)

Toru Masuko：“聚[双（对氟苯氧基）磷腈]单晶””《材料科学快报》杂志 7. 1023-1025 (1988)。

Hiroki Sekiya: "“Temperature Dependence of Ultrasonic Velocity and Attenuation in Polyphosphazene"" Reports on Progress in Polymer Physics in Japan. 33. (1990)

Hiroki Sekiya：“聚磷腈中超声波速度和衰减的温度依赖性”，日本高分子物理学进展报告 33。（1990 年）

Toru Masuko: "“Drawing effects observerd in the mesophase of poly[bis(phenoxy)phosphazene"" Polymer. 31. (1990)

Toru Masuko：“在聚[双（苯氧基）磷腈中间相中观察到的拉伸效应”] 聚合物 31。（1990）

Toru Masuko: ""Phase Transformations in Polyphosphazenes by the Depolarized Light Intensity Method. 2. Transformation Rate Dependence on Sample Thickness in Poly[bis(phenoxy)phosphazene]"" Macromolecules. 24. (1991)

Toru Masuko：“通过去偏光强度法进行聚磷腈的相变。