| PET/HBA/TA/HQ四元共聚酯形态及相结构的研究 |
| |
| 引用本文： | 兰强,程丹,于瀛,卜海山.PET/HBA/TA/HQ四元共聚酯形态及相结构的研究[J].高等学校化学学报,2003,24(9):1712-1716. |
| |
| 作者姓名： | 兰强 程丹 于瀛 卜海山 |
| |
| 作者单位： | 复旦大学材料科学系, 上海 200433 |
| |
| 基金项目： | 国家自然科学基金(批准号:29774004) |
| |
| 摘 要： | 研制了一套蚀刻方法并对聚对苯二甲酸乙二醇酯/对羟基苯甲酸/对苯二甲酸/对苯二酚(PET/HBA/TA/HQ)体系的共聚酯液晶试样断面进行蚀刻,并用扫描电镜观察,发现此类共聚酯中存在两相结构.当PET摩尔分数小于50％时,分散相呈球状且富含PET,连续相富含全芳族链段;当PET摩尔分数等于或大于50％时,分散相和连续相结构发生颠倒,连续相富含PET,分散相球状粒子富含全芳族链段且为纤维状结构.因此可以断言,用熔融缩聚方法制备的PET/HBA/TA/HQ四元共聚酯不是无规共聚物,而是嵌段共聚物.
|
| 关 键 词： | 共聚酯液晶 蚀刻 两相结构 形态 |
| 文章编号： | 0251-0790(2003)09-1712-05 |
| 收稿时间： | 2002-07-16 |
Morphology and Phase Behavior of the PET/HBA/HQ/TA Copolyesters |
| |
| LAN Qiang,CHENG Dan,YU Ying,BU Hai-Shan.Morphology and Phase Behavior of the PET/HBA/HQ/TA Copolyesters[J].Chemical Research In Chinese Universities,2003,24(9):1712-1716. |
| |
| Authors: | LAN Qiang CHENG Dan YU Ying BU Hai-Shan |
| |
| Institution: | Department of Materials Science, Fudan University, Shanghai 200433, China |
| |
| Abstract: | A series of etching methods were developed for the morphology observation of liquid crystalline copolyester. Phase behavior of the PET/HBA/HQ/TA copolyester was investigated by SEM after etching. A two-phase structure of these copolyesters was found. When PET molar fraction is lower than 50%, HBA/HQ/TA-rich-phase is a continuous phase, while the dispersion particles are PET-rich-phase. When PET molar fraction is equal to or greater than 50% , PET-rich-phase constitutes continuous phase, while HBA/HQ/TA-rich-phase forms dispersion particles which are composed of fibers. Therefore this PET/HBA/HQ/TA copolyester is not a random copolymer but a block one with long PET blocks. |
| |
| Keywords: | Liquid crystalline copolyester Etching Two-phase structure Morphology |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
| 点击此处可从《高等学校化学学报》浏览原始摘要信息 |
| 点击此处可从《高等学校化学学报》下载免费的PDF全文 |
|
