The synthesis and properties of triethyleneoxy-methylether and crown-ether functionalized metathesis polymers

✍ Scribed by Elisabeth Eder; Peter Preishuber-Pflügl; Franz Stelzer

• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 151 KB
• Volume: 160
• Category: Article
• ISSN: 1381-1169
• DOI: 10.1016/s1381-1169(00)00233-8

✦ Synopsis

The synthesis and characterization of metathesis polymers functionalized with triethyleneoxy-methylether and crown-ether side groups is reported. The triethyleneoxy-methylether substituted norbornene and acetylene derivatives and the 14-crown-4 functionalized norbornene were synthesized and metathesis polymerization with carbene complexes of molybdenum or ruthenium provided the substituted polynorbornene or polyacetylene backbone. The polymers were characterized with NMR, GPC, FT-IR and DSC. Addition of lithium ions to these amorphous polymers results in increasing of the glass transition temperature, T , because the oxygen-metal coordination leads to an enhanced order. The triethyleneoxy-methylether-bearing g polymers show a low T even at high O:Li ratios. This is in contrast to the crown-ether-modified polynorbornene where the g crown-ether ring stiffens the main chain and leads to higher T .