Synthesis of vinyl-terminated isotactic poly(propylene) using the coupling reaction between Zn-terminated polymer and allyl halides

✍ Scribed by Hiroki Kurosawa; Takeshi Shiono; Kazuo Soga

• Publisher: John Wiley and Sons
• Year: 1994
• Tongue: English
• Weight: 361 KB
• Volume: 195
• Category: Article
• ISSN: 1022-1352
• DOI: 10.1002/macp.1994.021950421

✦ Synopsis

Abstract

Propene was polymerized with the TiCl~3~/Al(C~2~H~5~)~2~Cl catalyst system using Zn(C~2~H~5~)~2~ as a chain transfer reagent. The resulting Zn‐terminated poly(propylene) (PP) was then brought into contact with allyl halides (chloride, bromide and iodide) in the presence of N‐methylimidazole to obtain vinyl‐terminated PP. Allyl bromide gave the highest conversion among these allyl halides. When the coupling reaction was conducted with allyl bromide at 40°C for 24 h, the conversion to the terminal vinyl groups was over 90% for atactic PP and approximately 60% for isotactic PP. The Zn‐polymer bonds of both atactic and isotactic PP were almost quantitatively converted into terminal vinyl groups at 130°C for 3 h.