Flow Orlentation and Structure Control of Polymeric Materials

高分子材料的流动取向和结构控制

• 批准号: 10450367
• 负责人: TAKIGAWA Toshikazu
• 金额: $ 7.55万
• 依托单位: KYOTO UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 1999
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-10450367/
• 关键词: Biaxial deformation; Uniaxial deformation; Polymer gel; Polymer glass; Blend; Polymer alloy; ポアソン比; ポリマーアロイ; ポリビニルアルコール; ゲル

Biaxial deformation was applied to tubular specimens of poly (vinyl alcohol) (PVA) gels and poly (N-isopropylacrylamide) (PNIPA) gels. The volume of the specimens increased with increasing applied pressure. When the pressure was applied by using a non-solvent, liquid paraffin, the volume change was very small. It was found that the change is determined by Poisson's ratio of the gel materials. On the other hand, the volume change was rather large when water was used as a parresure transmitting material. In this case, the volume change of the gels was caused chiefly by increasing solvent pressure inside the gels. The solvent pressure increased by the startup of the solvent flow inside the gels. This is because the water is a solvent for the gels and so can penetrate the gel specimens. The observed swelling behavior was common both for PVA nad PNIPA gels, indicating that the swelling by the solvent flow is universal phenomenon for physical as well as chemical gels.Uniaxail deformation and dynamic viscoelastic behavior was examined for glassy poly (methyl methacrylate) s (PMMA) as well as α-methylstyrene-co-acrylonitrile (αMSAN) copolymers. The effects of physical aging and heat treatment were also investigated for the specimens. Physical properties of the glassy specimens were found to be strongly affected by the thermal histories. The blends composed of PMMA and αMSAN showed the LCST type phase behavior. The mechanical properties of the belnds prepared at temperatures higher than the phase separation temperature were closely related to the phase structure. The samples in the single phase state also differed in the mechanical properties from the component polymers.

对聚乙烯醇（PVA）和聚（N-异丙基丙烯酰胺）（PNIPA）凝胶的管状试样施加双轴变形。试样的体积随着施加压力的增加而增加。当通过使用非溶剂液体石蜡施加压力时，体积变化非常小。结果发现，这种变化是由凝胶材料的泊松比。另一方面，当用水作为副透射材料时，体积变化相当大。在这种情况下，凝胶的体积变化主要是由增加凝胶内部的溶剂压力引起的。溶剂压力通过凝胶内部的溶剂流动的启动而增加。这是因为水是凝胶的溶剂，因此可以渗透凝胶样品。研究了玻璃态聚甲基丙烯酸甲酯（PMMA）和α-甲基苯乙烯-丙烯腈共聚物（α-MSAN）的单轴形变和动态粘弹行为。研究了物理时效和热处理对试样性能的影响。玻璃试样的物理性质被发现强烈的热历史的影响。PMMA/αMSAN共混体系表现出LCST型相行为。在高于相分离温度下制备的带的力学性能与相结构密切相关。处于单相状态的样品的机械性能也不同于组分聚合物。

项目成果

Toshikazu Takigawa et al.: "Deswelling Kinetics of Poly (N-isopropylacrylamide) Gels at Volume-phase Transition"Polymer Journal. 31-7. 595-598 (1999)

Toshikazu Takikawa 等人：“聚（N-异丙基丙烯酰胺）凝胶在体积相变时的消溶胀动力学”聚合物杂志。

Kenzo Okamoto: "Measurment of Interfacial Tension between Polymer Melts: Improved Imbedded Fiber Retraction, Breaking Thread and Dynamic Viscoelasticity Methods"日本レオロジー学会誌. 27・2. 109-115 (1999)

Kenzo Okamoto：“聚合物熔体之间的界面张力的测量：改进的嵌入纤维回缩、断裂线和动态粘弹性方法”日本流变学会杂志27・2（1999）。

Takigawa,Toshikazu: "Deswelling Kinetics of Poly(N-isopropylacrylamide) Gels at Volume-Phase Transition"Polymer Journal. 31. 595-598 (1999)

Takikawa，Toshikazu：“聚（N-异丙基丙烯酰胺）凝胶在体积相转变时的消溶胀动力学”聚合物杂志。

Kenzo Okamoto et al.: "Measurement of Interfacial Tension between Polymer Melts : Improved Imbedded Fiber Retraction, Breaking Thread and Dynamic Viscoelasticity Methods"J. Soc. Rheol. Jpn.. 27-2. 109-115 (1999)

Kenzo Okamoto 等人：“聚合物熔体之间界面张力的测量：改进的嵌入纤维回缩、断裂线和动态粘弹性方法”J。

Michiaki Mabuchi: "Structural Relaxation of Ultrathin Polymer Films Prepared by the Langmuir-Blodgett Technique: Characteristics of the Two-Dimensional System" Macromolecules. 31・18. 6083-6088 (1998)

Michiaki Mabuchi：“Langmuir-Blodgett 技术制备的超薄聚合物薄膜的结构松弛：二维系统的特征”31・18（1998）。