New coordination catalysts based on rare-earth compounds for the stereospecific polymerization of acetylene

Journal Article · Sun Aug 01 00:00:00 EDT 1982 · J. Polym. Sci., Polym. Lett. Ed.; (United States)

DOI:https://doi.org/10.1002/pol.1982.130200802· OSTI ID:6431839

Zhiquan, S; Mujie, Y; Mingxiao, S; Yiping, C

The stereospecific polymerization of acetylene by using rare-earth compounds as catalysts was studied. Thus a new ''family'' of coordination catalysts consisting of a rare-earth compound plus a trialkyl aluminum for the polymerization of acetylene has been developed. Rare-earth coordination catalysts work under wide variations in composition and condition, although certain combinations appear to work better than others. Grey-black polyacetylene films with metallic sheen were obtained by the use of rare-earth coordination catalysts consisting of naphthenates or 2-ethyl hexyl phosphonates or isopropoxides of following rare-earth elements: yttrium, lanthanum, praseodymium, neodymium, gadolinium, terbium, and dysprosium combined with triethyl aluminum. The resulting polyacetylenes were confirmed to be organic semiconductors with many similarities to the polyacetylene obtained by Ti(OBu)/sub 4/-Al(C/sub 2/H/sub 5/)/sub 3/ catalyst by their infrared (IR) spectra, electron spin resonances, x-ray diffractions, and electric conductivities. The development of rare-earth coordination catalysts for the polymerization of acetylene not only offers new routes to prepare polyacetylene but also opens a new application of rare-earth coordination catalysts. This article describes some characteristics of the polymerization of acetylene by rare-earth coordination catalysts.

• Research Organization: Zhejiang Univ., China
• OSTI ID: 6431839
• Journal Information: J. Polym. Sci., Polym. Lett. Ed.; (United States), Vol. 20:8
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ACETYLENE
POLYMERIZATION
RARE EARTHS
CATALYTIC EFFECTS
CONFIGURATION
ISOMERIZATION
ALKYNES
CHEMICAL REACTIONS
ELEMENTS
HYDROCARBONS
METALS
ORGANIC COMPOUNDS
400301* - Organic Chemistry- Chemical & Physicochemical Properties- (-1987)
400201 - Chemical & Physicochemical Properties