Supercritical fluid assisted mass transport in polyester films

JIANG Chunyue; CHENG Rong; GAO Jianrong; PAN Qinmin

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Supercritical fluid assisted mass transport in polyester films

更新时间：2025-12-10

- Supercritical fluid assisted mass transport in polyester films
- CIESC Journal Issue 7, Pages: 1187-1191(2005)
- 作者机构：
  
  1. 浙江工业大学化工与材料学院,浙江,杭州,310014
  2. Department of Chemical Engineering, University of Waterloo, Waterloo, Ontario,Canada,N2L 3G1
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：25 July 2005，
  
  Published：25 July 2005
- 稿件说明：
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JIANG Chunyue, CHENG Rong, GAO Jianrong, et al. Supercritical fluid assisted mass transport in polyester films[J]. CIESC Journal, 2005, (7): 1187-1191.
DOI：

JIANG Chunyue, CHENG Rong, GAO Jianrong, et al. Supercritical fluid assisted mass transport in polyester films[J]. CIESC Journal, 2005, (7): 1187-1191. DOI：

摘要

聚合物中杂质/挥分的存在对聚合物的终端使用将产生负面影响，因此必须将其除去.传统的脱挥方法效率有限，使用超临界流体技术可增强脱挥效率.测定了温度为343 K、压力为30 MPa、CO2流量为4.0 L8226;min-1条件下，PET聚酯薄膜中的乙二醇单体挥分含量与时间的关系，以研究聚合物系超临界流体脱挥过程中的质量传递规律;根据传质理论建立了一个理想的超临界流体脱挥过程的质量传递模型，并用该模型分析处理实验数据，结果表明该模型较好地反映了聚合物系超临界流体脱挥过程的基本特征.

Abstract

Most of residual volatiles in polymers

which normally result from synthesis processes of the polymers

have negative impacts on the end-use properties of the polymer materials. These volatiles should be minimized or at least be reduced to a level below the permissible limit. Conventional techniques for polymer devolatilization have shown limited effectiveness when the volatile concentration is at a low level. With the assistance of supercritical fluids

however

the operation for the removal of the volatiles from polymers can be enhanced. The quantities of the volatile

ethylene glycol (EG)

in polyethylene terephthalate (PET) films at different times were determined in the presence of supercritical carbon dioxide (SC-CO2) at a temperature of 343 K

pressure of 30 MPa and CO2 flow rate of 4.0 L8226;min-1

based on which the SC-CO2-assisted removal of EG from PET film matrix was investigated. A mass transport model was derived by means of the mass transport theory.Comparison of the model predictions with experimental results showed that the model reflected the essential features of supercritical fluid devolatilization of polymers.

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