폴리에틸렌 테레프탈레이트(PET)의 內部摩擦損 및 誘電損의 溫度特性에 關한 相關性 硏究 = A Comparative Study on Temperature Dependence of Internal Friction and Dielectric Loss of Polyethylene Terephtalate

다국어 초록 (Multilingual Abstract)

This paper investigated comparatively the temperature dependence of dielectric α relaxation process and dynamic mechanical α relaxation process.
Dynamic mechanical and dielectric loss data on a given polythylene terephthalate (PET) are generally viewed as being directly comparable.
This is based on the notion that, if each exhibits a loss peak at about the same temperature and frequency, they must be manifestations of the same process.
This supposes that the process couples in the exact same manner with both mechanical and electrical stress fields.
That this need be so may be seen from the fact that not only non polar process give rise to dynamic mechanical losses, but also dipolar losses.
The results obtained are as follows.
1) Dielectric α peak and dynamic mechanical α peck in PET are observed at almost same temperature correspondently.
2) The elongated sample exhibits the higher α peck at the almost same maximum temperature.
3) The magnitude, location and breadth of the α relaxation in PET are strong function of the degree of crystallinity and also the manner in which a particular degree of crystallinity is attained.
And the degree of crystallinity is changed with external conditions, that is, density, annealing. quenching, drawing, orientations and irradiation etc.
4) In the results of observation the absorption peak at 1,788 ?? on infrared spectra, the more bigger concentration of carbonyl dipole group was observed on the elongated sample.

목차 (Table of Contents)

• Ⅰ. 序 論
• Ⅱ. 關係理論
• Ⅱ-1. 內部摩擦損失
• Ⅱ-2. 誘電損失
• Ⅱ-3 誘電損失과 內部摩擦損失의 相應性
• Ⅱ-4. α 吸收와 β 吸收
• Ⅱ-5. α 吸收의 緩和機構
• Ⅲ. 實驗裝置, 實驗方法 및 使用試料
• Ⅲ-1. 實驗裝置
• Ⅲ-2. 實驗方法
• Ⅲ-2-1. 誘電特性測定
• Ⅲ-2-2. 內部摩擦損失測定
• Ⅲ-2-3. 赤外線 吸收스펙트럼測定
• Ⅲ-3. 試 料
• Ⅳ. 實驗結果
• Ⅳ-1. 誘電損失 溫度依存性
• Ⅳ-2. 內部摩擦損失 溫度依存性
• Ⅳ-3. 誘電損失과 內部摩擦 損失의 相觀性
• Ⅳ-4. 赤外線 吸收 스펙트럼의 變化
• Ⅴ. 實驗結果의 檢討
• Ⅴ-1. α피익의 對應性
• Ⅴ-2. 損失에 미치는 引張效果
• Ⅴ-3. 赤外線에 依한 카아보닐 基의 濃度
• Ⅵ. 結 論
• 附 錄
• 參考文獻