Aliphatic Long-Chain C-20 Polyesters from Olefin Metathesis

作者：Trzaskowski Justyna; Quinzler Dorothee; Baehrle Christian; Mecking Stefan^*

来源：Macromolecular Rapid Communications, 2011, 32(17): 1352-1356.

DOI：10.1002/marc.201100319

• dispersions
• metathesis
• polyesters
• thermal properties
• thermoplastics

Self-metathesis of undecenoic acid with [(PCy3)(2)Cl2Ru=CHPh] (2), followed by exhaustive hydrogenation yielded pure 1,20-eicosanedioic acid (5) (>99%) free of side-products from isomerization. Polycondensation with eicosane-1,20-diol (6), formed by reduction of the diol, yielded polyester 20,20 (T-m=108 degrees C). By comparison, the known ADMET polymerization of undec-10-enyl undec-10-enoate (7), and subsequent exhaustive polymer-analogous hydrogenation yielded a polyester (poly-8) with irregular structure of the ester groups in the polymer chain (-O(C=O)- vs. -C(=O)O-) (T-m=103 degrees C). Hydrogenation of secondary dispersions of poly-7 yielded aqueous dispersions of the long-chain aliphatic polyester poly-8.

• 出版日期2011-9-1