The polymerization of phenylacetylene using MoCl₅-HC≡CCH₂OH catalyst system was carried out at various reaction conditions. The effects of the mole ratio of HC≡CCH₂OH to MoCl₅, the activation and polymerization temperatures, etc. were studied. The best result(polymer yield=58%, Mw=7200) was obtained when the mole ratio of HC≡CCH₂OH to MoCl₅ was 5. In a wide temperature range(20∼90℃), the polymerizations were well proceeded to give a relatively good yield, regardless of the activation temperature of MoCl₅ by HC-CCH₂OH. It was concluded that the hydroxyl group of HC≡CCH₂OH substituted the chlorine atom of MoCl₅ to make an alkoxide derivative of molybdenum which plays a role as an active catalytic species. The polymer structure of posy(phenylacetylene) prepared by MoCl₅-HC≡CCH₂OH catalyst system was also characterized by various instrumental methods such as NMR( ¹H-, ¹³C-), IR, UV-visible spectroscopies. The thermal properties were also studied.

MoCl₅-HC≡CCH₂OH촉매 시스템을 사용한 페닐아세틸렌의 중합을 여러가지 반응조건하에서 시도하였다. MoCl₅에 대한 HC≡CCH₂OH의 몰비, 활성화 온도 및 중합온도의 영향을 연구하였다. MoCl₅에 대한 HC≡CCH₂OH몰비가 5일 경우 가장 좋은 길과(중합수율=58%, Mw=7,200)를 얻었다. HC≡CCH₂OH에 대한 MoCl₅ 의 활성화 온도에 관계없이 넓은 온도범위에서 중합이 잘 진행되어 비교적 높은 수율을 보였다. HC≡CCH₂OH가 MoCl₅의 염소원소를 치환시켜 중합시에 활성촉매종으로 작용하는 몰리브데늄의 알콕사이드를 만드는 것으로 판단되었다. MoCl₅-HC≡CCH₂OH 촉매 시트템에 의해 합성된 폴리페닐아세틸렌의 구조를 NMR(¹H-, ¹³C-), IR, UV-visible등과 같은 분석장비로 규명하였으며 합성한 폴리(페닐아세틸렌)의 열특성에 관해서도 연구하였다.

Keywords: