Tetraphenylethane iniferters. II. Toluene diisocyanate-based polyurethane iniferter for “living” radical polymerization of acrylonitrile

✍ Scribed by K. Tharanikkarasu; Ganga Radhakrishnan

• Book ID: 102657588
• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 632 KB
• Volume: 34
• Category: Article
• ISSN: 0887-624X
• DOI: 10.1002/(sici)1099-0518(19960715)34:9<1723::aid-pola9>3.0.co;2-s

✦ Synopsis

A novel polyurethane iniferter, synthesized from equal moles of toluene diisocyanate and 1,1,2,2-tetraphenyl-1,2-ethanediol, was used to polymerize acrylonitrile to assess whether it proceeded via a "living" radical polymerization mechanism. From the kinetic results, the rate of polymerization could be expressed as R,LU[BPT]~.~~[AN]'.~~. The increase of numberaverage molecular weight with increase of both conversion and polymerization time, the bimodal molecular weight distribution in gel permeation chromatography and the increase of molecular weight in the post-polymerization of polyacrylonitrile confirm that the present tetraphenylethane-based polyurethane iniferter follows a "living" radical polymerization mechanism.