| PET缩聚过程脱挥方式比较——抽真空及通氮气 |
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| 引用本文： | 赵玲,沈瀛坪.PET缩聚过程脱挥方式比较——抽真空及通氮气[J].聚酯工业,1999,12(3):17-20. |
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| 作者姓名： | 赵玲 沈瀛坪 |
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| 作者单位： | 华东理工大学联合化学反应工程研究所!上海200237 |
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| 摘 要： | 抽真空及通氮气是 Ｐ Ｅ Ｔ缩聚过程脱除小分子的两种方式， Ｐ Ｅ Ｔ 间歇缩聚实验研究表明：通氮气脱挥时聚合度一直上升，而抽真空脱挥时聚合度趋向某定值；脱挥速度与通氮位置有关；通氮气脱挥得到的聚合物比抽真空脱挥得到的色泽白。
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| 关 键 词： | PET 缩聚 真空 氮气 聚合度 |
Comparison of the way of removing small molecules in PET polycondensation process ——pumping vacuum and purging with nitrogen gas |
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| ZHAO Ling,SHEN Ying-ping,ZHU Zhong-nan,DAI Ying-chun.Comparison of the way of removing small molecules in PET polycondensation process ——pumping vacuum and purging with nitrogen gas[J].Polyester Industry,1999,12(3):17-20. |
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| Authors: | ZHAO Ling SHEN Ying-ping ZHU Zhong-nan DAI Ying-chun |
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| Abstract: | pumping vacuum and purging with nitrogen gas are two ways of removing small molecules from PET melts in PET polycondensation.Experiments of batch PET polycondensation show:The degree of polymerization is up continuously when small molecules is removed by purging with N 2,the degree of polymerization is up to a maximum value when small molecules is removed by pumping vacuum.The rate of removing small molecules is correlated to the position of leading N 2.The color of PET products obtained by purging with N 2 is better than by pumping vacuum. |
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| Keywords: | PET polycondensation vacuum nitrogen gas degree of polymerization |
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