| 固定床中PET固相聚合的研究 |
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| 引用本文： | 邱高,施伟辰,陆元德,黄南薰,唐志廉,杨金魁,蔡裕中,汪为明.固定床中PET固相聚合的研究[J].东华大学学报(自然科学版),1995(1). |
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| 作者姓名： | 邱高 施伟辰 陆元德 黄南薰 唐志廉 杨金魁 蔡裕中 汪为明 |
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| 作者单位： | 中国纺织大学基础部，中国纺织大学基础部，中国纺织大学基础部，中国纺织大学基础部，中国纺织大学基础部，上海第十四化纤厂，上海第十四化纤厂，上海第十四化纤厂 滤材厂，纺化系，滤材厂，纺化系，滤材厂，纺化系，滤材厂，纺化系，滤材厂，纺化系 |
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| 摘 要： | 本文利用固定床反应器对N_2保护下的PET固相聚合反应进行研究,在低于粘结点温度下预聚合之后再实施高温聚合,可消除切片粘结,提高反应速率及产品质量。建立了化学反应和扩散过程共同控制下的动力学模型,其计算结果表明从粒子中心到表面,固相聚合表现反应速率和分子量随副产物小分子(乙二醇和水)的浓度减小而增大,并且描述了反应温度、载气中小分子含量和预聚体切片粒径对反应的影响,为优化工艺操作,提高产品质量提供了理论依据。
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| 关 键 词： | 固相聚合 聚对苯二甲酸乙二酯 固定床反应器 |
SOLID STATE POLYMERIZATION OF PET IN FIXED BED REACTOR |
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| Qiu Gao,Shi Weizhen,Lu Yuande,Huang Nanxun,Tang Zhilian.SOLID STATE POLYMERIZATION OF PET IN FIXED BED REACTOR[J].Journal of Donghua University,1995(1). |
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| Authors: | Qiu Gao Shi Weizhen Lu Yuande Huang Nanxun Tang Zhilian |
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| Abstract: | The PET Solid State Polymerization was studied in a fixed bed reactor with nitrogen, as carrying gas, flowing through it. In order to avoid sticking between chips, prepolymerization had been done at a temperature below the sticking point for certain time before the SSP happened at high temperature. The kinetics of PET SSP in a single chip was appropriately simulated with a model combining diffusion rate with reaction rate. The model indicates that the SSP reaction rate from the core to the surface of the chip increases steadily. This is due to gradual reduction of the concentrations of byproducts such as ethylene glycol and water.The effects of the reaction temperature, the concentration of byproducts in the inert carrying gas stream and the particle size on the SSP reaction can also be explained by using this model. |
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| Keywords: | solid phase polymerization polyethylene terephthalate fixed bed reac-tors |
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