| 苯与DOP在LDPE与PEMA基体中无限稀释扩散系数的测定及研究 |
| |
| 引用本文： | 刘萌戈,周持兴. 苯与DOP在LDPE与PEMA基体中无限稀释扩散系数的测定及研究[J]. 功能高分子学报, 2004, 17(2): 290-292 |
| |
| 作者姓名： | 刘萌戈 周持兴 |
| |
| 作者单位： | 上海交通大学化学化工学院,上海,200240;上海交通大学化学化工学院,上海,200240 |
| |
| 基金项目： | 国家自然科学基金(50390095) |
| |
| 摘 要： | 用逆流气相色谱法测定了苯、邻苯二甲酸二辛酯(DOP)在293～373K间在低密度聚乙烯(LDPE)、聚甲基丙烯酸乙酯(PEMA)基体中的无限稀释扩散系数，拟合了扩散系数与温度倒数的对数线性关系，并求得扩散活化能，发现它在玻璃化温度附近出现转折，且两者之间存在0．6倍关系。通过检验Vrentas-Duda自由体积扩散模型，发现在小分子无相变情况下该模型比较准确。
|
| 关 键 词： | 无限稀释 扩散系数 低密度聚乙烯 聚甲基丙烯酸乙酯 |
| 文章编号： | 1008-9357(2004)02-0290-03 |
| 修稿时间： | 2003-09-16 |
Infinite Dilute Diffusion Coefficients of Benzene and DOP in Polymers |
| |
| LIU Meng-ge,ZHOU Chi-xing. Infinite Dilute Diffusion Coefficients of Benzene and DOP in Polymers[J]. Journal of Functional Polymers, 2004, 17(2): 290-292 |
| |
| Authors: | LIU Meng-ge ZHOU Chi-xing |
| |
| Abstract: | The infinite dilute diffusion coefficients(D) of benzene and DOP in LDPE and PEMA between 293-373 K were measured by inverse gas chromatographic method, and a linear relation between lnD and the inverse of T was fitted. It is found that the diffusion activation energy above T_g was about 60% of that below T_g. The data is used to identify the Vrentas-Duda model, which is found to be precise when the small molecules does not pedorm phase change. |
| |
| Keywords: | infinite dilute diffusion coefficient LDPE PEMA |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
