Cover Image, Volume 55, Issue 12. Issue 12 (15th June 2017)

• Record Type: Journal Article
• Is Part Of: Journal of polymer science. Volume 55:Issue 12(2017)
• Page Start: i
• Page End: ii
• Publication Date: 2017-06-15
• Subjects: 547
• DOI: 10.1002/pola.28638
• Languages: English
• ISSNs: 0887-624X

Abstract

Abstract : On page 1971 (DOI:10.1002/pola.28562 ), Wen‐Hua Sun and colleagues describe nickel catalysts that can promote the polymerization of ethylene to give high molecular weight polyethylenes at temperatures up to 100°C. Significant branching (including methyl, ethyl and longer chain branches) is a feature of the polymers which is further evidenced by their low melting temperatures. These thermally robust a‐diimine catalysts incorporating ortho‐substituted difluorobenzhydryl groups impart unsymmetrical protection to the active species limiting decomposition pathways whilst maintaining high activity. The figure shows a segment of branched polyethylene above a roof‐top image (from the Forbidden City) of a rooster leading out nine (infinite) animal figures before the immortal. (DOI:10.1002/pola.28562 )