Metathesis polymerization of N-aryl norbornene dicarboximides. I

✍ Scribed by Rajni Madan; R. C. Anand; Indra K. Varma

• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 185 KB
• Volume: 35
• Category: Article
• ISSN: 0887-624X
• DOI: 10.1002/(sici)1099-0518(199710)35:14<2917::aid-pola12>3.0.co;2-m

✦ Synopsis

Metathesis polymerization of N-phenyl-exo-norbornene dicarboximide and ortho/meta/para methyl substituted phenyl nadimides was carried out using WCl 6 / tetramethyltin. Structural characterization was done by FTIR, 1 H-and 13 C-NMR. A mixture of cis and trans double bond structures were introduced in the backbone during polymerization. The cis content was higher (52 to 65%). In the DSC scan of poly( N-otolyl nadimide), two exotherms were observed at 240 and 270ЊC while in other samples only one exothermic transition was observed above 240ЊC. These exotherms disappeared in the second heating cycle. The T g of the polymers, as determined in the second heating cycle, was highest in poly( N-o-tolyl nadimide) and lowest in poly( N-m-tolyl nadimide). The polymers were stable up to 443 { 3ЊC and decomposed above this temperature in a single step.