STEREOSPECIFIC POLYMERIZATION OF ACETYLENE BY RARE-EARTH COORDINATION CATALYSTS

• 作 者: 沈之荃 杨慕杰 蔡一平 石明孝
• 机 构: Department of Chemistry, Zhejiang University, Hangzhourrrrrrrrn,Department of Chemistry, Zh
• 出 处: Science in China,Ser.B
• 发表日期: 1983年08期
• 关键词: calorimetry resultant hexyl polymerization acetylene appearance metallic molar l

This paper is the first study on the stereospecific polymcrization of acetylene by coordination catalysts based on rare-earth compounds. High cis (80-100%) polyacetylene films with silvery metallic appearance were obtained at 30℃ or 0℃ in the presence of rare-earth catalysts composed of two or three components: naphthenates or 2-ethyl hexyl phosphonates of all fifteen rare-earth elements, trialkyl aluminum and/or a third component. The resultant polyacetylene has been characterized using techniques of infrared spectrophotometry, differential scanning calorimetry, electron spin resonance, X-ray diffraction, scanning electron micrography and electrical resistivity measurements.

This paper is the first study on the stereospecific polymcrization of acetylene by coordination catalysts based on rare-earth compounds. High cis (80-100%) polyacetylene films with silvery metallic appearance were obtained at 30 ° C or 0 ° C in the presence of rare- earth catalysts composed of two or three components: naphthenates or 2-ethyl hexyl phosphonates of all fifteen rare-earth elements, trialkyl aluminum and / or third components. The resultant polyacetylene has been characterized using techniques of infrared spectrophotometry, differential scanning calorimetry, electron spin resonance, X-ray diffraction, scanning electron micrography and electrical resistivity measurements.