{"title":"等离子体-化学改性聚碳酸酯在氩-氧混合等离子体中的动力学特征","authors":"T. Shikova, S. Smirnov, Alexey I. Artyuhov","doi":"10.6060/ivkkt.20206311.6245","DOIUrl":null,"url":null,"abstract":"This paper presents the results of experimental study of the processes of destruction and changes in the composition of the surface layer of a Lexan 8010 polycarbonate (PC) film during treatment in a positive column of a DC glow discharge in argon, oxygen, and their mixtures. The mass loss rates of the polymer samples were measured depending on the parameters of the discharge and the composition of the plasma-forming gas. The IR spectra of the polymer films after plasma exposure were analyzed. It was shown that the most noticeable changes in the sample destruction rate and the chemical composition of the surface layer occur when the oxygen content in the mixture is up to 20%. With a further increase in the O2 content in the plasma-forming mixture, the changes are insignificant. The main gaseous products of PC destruction in the plasma of an argon-oxygen mixture are H2, CO, and H2O molecules. In the first second after the discharge is turned on, H2 molecules are released at maximum rate and at a lower CO rate. The formation of carbon monoxide and hydrogen molecules occurs without the direct participation of oxygen under the action of active particles of argon plasma without the participation of active oxygen. Exposure to argon plasma leads to an increase in the oxygen content on the sample surface. In this case, the destruction of С – О, О–С(=О)–О bonds, which are part of the structure of the polycarbonate elementary unit, and the formation of new oxygen-containing bonds are observed. Etching of the polymer with active plasma particles leads to a change in the micro relief of the sample surface. A change in roughness and an increase in the concentration of polar functional groups increases the wettability of the PC film surface. A discussion of the possible mechanisms of the processes is made, which allows us to describe the observed results.","PeriodicalId":14640,"journal":{"name":"IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENII KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA","volume":"6 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2020-10-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"KINETIC FEATURES OF PLASMA-CHEMICAL MODIFICATION OF POLYCARBONATE IN PLASMA IN ARGON - OXYGEN MIXTURE\",\"authors\":\"T. Shikova, S. Smirnov, Alexey I. Artyuhov\",\"doi\":\"10.6060/ivkkt.20206311.6245\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"This paper presents the results of experimental study of the processes of destruction and changes in the composition of the surface layer of a Lexan 8010 polycarbonate (PC) film during treatment in a positive column of a DC glow discharge in argon, oxygen, and their mixtures. The mass loss rates of the polymer samples were measured depending on the parameters of the discharge and the composition of the plasma-forming gas. The IR spectra of the polymer films after plasma exposure were analyzed. It was shown that the most noticeable changes in the sample destruction rate and the chemical composition of the surface layer occur when the oxygen content in the mixture is up to 20%. With a further increase in the O2 content in the plasma-forming mixture, the changes are insignificant. The main gaseous products of PC destruction in the plasma of an argon-oxygen mixture are H2, CO, and H2O molecules. In the first second after the discharge is turned on, H2 molecules are released at maximum rate and at a lower CO rate. The formation of carbon monoxide and hydrogen molecules occurs without the direct participation of oxygen under the action of active particles of argon plasma without the participation of active oxygen. Exposure to argon plasma leads to an increase in the oxygen content on the sample surface. In this case, the destruction of С – О, О–С(=О)–О bonds, which are part of the structure of the polycarbonate elementary unit, and the formation of new oxygen-containing bonds are observed. Etching of the polymer with active plasma particles leads to a change in the micro relief of the sample surface. A change in roughness and an increase in the concentration of polar functional groups increases the wettability of the PC film surface. 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引用次数: 0
摘要
本文研究了聚碳酸酯(PC)薄膜在氩气、氧气及其混合物的直流辉光放电正极柱下的破坏过程和表层成分的变化。根据放电参数和等离子体形成气体的组成,测量了聚合物样品的质量损失率。对等离子体辐照后聚合物薄膜的红外光谱进行了分析。结果表明,当氧含量达到20%时,试样破坏率和表层化学成分的变化最为显著。随着等离子体形成混合物中氧含量的进一步增加,这种变化是微不足道的。在氩氧混合物的等离子体中,PC破坏的主要气体产物是H2、CO和H2O分子。在开启放电后的第一秒,H2分子以最大速率和较低的CO速率释放。在没有活性氧参与的氩等离子体活性粒子的作用下,一氧化碳和氢分子的形成是在没有氧直接参与的情况下发生的。暴露在氩等离子体中会导致样品表面氧含量的增加。在这种情况下,观察到作为聚碳酸酯基本单元结构的一部分的С - О, О -С (=О) -О键的破坏,并形成新的含氧键。用活性等离子体粒子蚀刻聚合物会导致样品表面的微观起伏变化。粗糙度的变化和极性官能团浓度的增加增加了PC膜表面的润湿性。讨论了这些过程的可能机制,这使我们能够描述观察到的结果。
KINETIC FEATURES OF PLASMA-CHEMICAL MODIFICATION OF POLYCARBONATE IN PLASMA IN ARGON - OXYGEN MIXTURE
This paper presents the results of experimental study of the processes of destruction and changes in the composition of the surface layer of a Lexan 8010 polycarbonate (PC) film during treatment in a positive column of a DC glow discharge in argon, oxygen, and their mixtures. The mass loss rates of the polymer samples were measured depending on the parameters of the discharge and the composition of the plasma-forming gas. The IR spectra of the polymer films after plasma exposure were analyzed. It was shown that the most noticeable changes in the sample destruction rate and the chemical composition of the surface layer occur when the oxygen content in the mixture is up to 20%. With a further increase in the O2 content in the plasma-forming mixture, the changes are insignificant. The main gaseous products of PC destruction in the plasma of an argon-oxygen mixture are H2, CO, and H2O molecules. In the first second after the discharge is turned on, H2 molecules are released at maximum rate and at a lower CO rate. The formation of carbon monoxide and hydrogen molecules occurs without the direct participation of oxygen under the action of active particles of argon plasma without the participation of active oxygen. Exposure to argon plasma leads to an increase in the oxygen content on the sample surface. In this case, the destruction of С – О, О–С(=О)–О bonds, which are part of the structure of the polycarbonate elementary unit, and the formation of new oxygen-containing bonds are observed. Etching of the polymer with active plasma particles leads to a change in the micro relief of the sample surface. A change in roughness and an increase in the concentration of polar functional groups increases the wettability of the PC film surface. A discussion of the possible mechanisms of the processes is made, which allows us to describe the observed results.