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首页> 外文期刊>Journal of Applied Polymer Science >INTERACTION OF SUPERCRITICAL CARBON DIOXIDE WITH POLYMERS .1. CRYSTALLINE POLYMERS
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INTERACTION OF SUPERCRITICAL CARBON DIOXIDE WITH POLYMERS .1. CRYSTALLINE POLYMERS

机译：超临界二氧化碳与聚合物的相互作用.1。结晶聚合物

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摘要

Supercritical fluid (SCF) technology involving carbon dioxide is recently receiving wide attention due to its vast potential application in various fields such as cleaning, extraction, synthesis, etc., in addition to its environmental benefits. To fully exploit the use of SCFs in new technologies, it is important to understand how SCFs interact with materials. To this end, we have undertaken a systematic study involving a wide pressure and temperature range to investigate the interaction of supercritical carbon dioxide (SC CO2) with nine different crystalline polymers, namely, substituted anti unsubstituted polyethylene (four varieties), polypropylene, nylon 66, poly(ethylene terephthalate), poly(oxymethylene), and poly(vinylidine fluoride). Critical factors such as changes in appearance and weight, temperature, pressure and time of the supercritical fluid treatment, and dimension of samples have been observed. The influence of SC CO2 on the thermal properties of treated polymers has been investigated through TGA analysis. Further, changes in the mechanical properties such as yield strength, ultimate elongation, and modulus of elasticity of the investigated crystalline polymers were also observed. A discussion has been included to show the possible implications of the observed changes in realizing various applications. (C) 1996 John Wiley & Sons, Inc. [References: 23]
机译：涉及二氧化碳的超临界流体（SCF）技术除了具有环境效益外，还因其在清洁，萃取，合成等各个领域的广泛应用而受到广泛关注。为了在新技术中充分利用SCF，重要的是要了解SCF如何与材料相互作用。为此，我们进行了系统的研究，涉及广泛的压力和温度范围，以研究超临界二氧化碳（SC CO2）与9种不同结晶聚合物的相互作用，即取代的抗未取代的聚乙烯（四种），聚丙烯，尼龙66 ，聚对苯二甲酸乙二醇酯，聚甲醛和聚偏二氟乙烯。已经观察到诸如超临界流体处理的外观和重量，温度，压力和时间的变化以及样品尺寸等关键因素。通过TGA分析已经研究了SC CO2对处理过的聚合物的热性能的影响。此外，还观察到了所研究的结晶聚合物的机械性能的变化，例如屈服强度，极限伸长率和弹性模量。已经进行了讨论，以显示观察到的更改在实现各种应用程序中可能产生的影响。 （C）1996 John Wiley＆Sons，Inc. [参考：23]

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