ANALYSIS OF TRIBOLOGY OF POLYMERIC MATERIALS BY ELECTRON MICROSCOPY

电子显微镜分析聚合物材料的摩擦学

• 批准号: 07455378
• 负责人: KOMOTO Tadashi
• 金额: $ 4.93万
• 依托单位: GUNMA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07455378/
• 关键词: TRIBOLOGY; TRANSMISSION ELECTRON MICROSCOPY; CARBON REPLICA METHOD; ULTRAMICROTOMY; ULTRAHIGH MOLECULAR WEIGHT POLYETHYLENE; FRICTION; WEAR; POLYETYLENE (TEREPHTHALATE); 超薄折片法; 高分子材料; 表面構造

Tribology of polymeric materials has long been studied in terms of friction coefficient and specific wear rate based on mechanical engineerings. We have studied transmission electron microscopy (TEM) of wear surface of polymers using carbon replica method which should clarify the mechanism of their tribology because friction is sort of deformation of polymers by shear force. This method has led to a detailed info, ation of tribology of polymers with special reference to the structure and properties of polymers. In order to investigate a more detailed analysis of tribology of polymeric materials, we have examined the were surface and were powders by means of micro FTIR,differential scanning calorimetry, density measurement, TEM examination using ultramicrotomy and so on.In relation to clarifying the mechanism of self-lubrication of ultrahigh molecular weight polyethylene (UHMWPE), we carried out a micro FTIR study of ribboni-like crystals formed on the wear surface and the matrix surfac … More e using the so-called polymer decoration method. It is revealed that the ribbon-like crystals are formed by an epitaxial crystallization on the matrix surface, the latter being also consisted of highly oriented crystals. The effect of branches and molecular weight on tribology of polethylene is studied with reference to specific wear rate and morphology. It is concluede that branch and molecular weight are important factors on intermolecular interaction and chain entanglement, respectively, both acting as strong interaction berween the ribbon-like crystals and the matrix surface. Ribbon-like crystals are also formed on poly (ethylene terephthalate) (PET) surface worn in air. It is found that they are formed by a cold crystallization of amorphous PET chains under shear, giving rise to an epitaxial crystallization of the ribbon-like crystals onto the matrix surface oriented by shear force.It is, therefore, concluded that our elctron microscopic study of tribology of polymeric materials is of a great importance and promising for the further progress and developmennt of polymeric tribomaterials. Less

长期以来，人们在机械工程的基础上从摩擦系数和比磨损率两个方面对聚合物材料的摩擦学进行了研究。我们用碳复制法研究了聚合物磨损表面的透射电子显微镜，这将有助于阐明它们的摩擦学机理，因为摩擦是聚合物在剪切力作用下的变形。这种方法使人们对聚合物的摩擦学有了详细的了解，特别是对聚合物的结构和性能进行了研究。为了对聚合物材料的摩擦学进行更详细的分析，我们用显微傅里叶变换红外光谱、差示扫描量热法、密度测量、透射电子显微镜超微结构观察等手段对超高相对分子质量聚乙烯(UHMWPE)的表面和粉末进行了分析。为了阐明超高相对分子质量聚乙烯(UHMWPE)的自润滑机理，我们对磨损表面和基体表面形成的带状晶体进行了微观傅里叶变换红外光谱研究更多的是使用所谓的聚合物装饰方法。结果表明，带状晶体是在基体表面外延结晶形成的，后者也是由高度取向的晶体组成。以比磨损率和磨损率为指标，研究了支链和相对分子质量对聚乙烯摩擦学性能的影响。结果表明，支链和分子质量分别是影响分子间相互作用和链纠缠的重要因素，两者都是带状晶体与基质表面之间的强相互作用。在空气中磨损的聚对苯二甲酸乙二酯(PET)表面也会形成带状晶体。发现它们是由非晶态PET链在剪切作用下的冷结晶形成的，在剪切力的作用下，带状晶体外延结晶到基体表面，因此，我们对聚合物材料摩擦学的电子显微镜研究具有重要意义，对聚合物摩擦材料的进一步发展具有重要意义。较少

项目成果

斎藤信宏: "精密洗浄に関する研究(第1報)" 日化誌. 742-746 (1996)

Nobuhiro Saito：“精密清洁研究（第一份报告）” Nikka Journal 742-746（1996）。

甲本 忠史: "TEMによるポリマーアロイ観察法" 日本ゴム協会誌. 68. 863-867 (1996)

Tadashi Komoto：“使用 TEM 的聚合物合金观察方法”日本橡胶协会杂志 68. 863-867 (1996)。

T.Komoto: "TEM Observations of Polymer Alloys" Nihon Gomu Kyoukaishi. 68. 863-867 (1996)

T.Komoto：“聚合物合金的 TEM 观察”Nihon Gomu Kyoukaishi。

甲本忠史: "高分子材料のTEM観察法" 電子顕微鏡. 32. 71-76 (1997)

小本正：《高分子材料的TEM观察方法》电子显微镜32. 71-76 (1997)。

甲本 忠史: "高分子材料のTEM観察法" 電子顕微鏡. 32. 71-76 (1997)

小本正：《高分子材料的TEM观察方法》电子显微镜32. 71-76 (1997)。