A general method for the synthesis of hyperbranched functional polymers in monoterpenes is described. During the polymerization of dicyclopentadiene, metathesis reactions between the growing polymer chain and monoterpenes produced soluble well-defined polymers. The molecular weight, intrinsic viscosity , and glass transition temperature (Tg) values resulting from chain transfer to monoterpenes depended on the mode of monomer addition but generally decreased as follows: d-limonene limonene oxide -pinene. Calculation of the Mark Houwink Sakarada values by gel permeation chromatography suggested that, in solution, the branched poly(dicyclopentadiene) had a smaller hydrodynamic volume than polynorbornene. Characterization by NMR spectroscopy indicated the hyperbranched polymer had a complex structure composed of linear, terminal, semidendritic, and dendritic units.
All Science Journal Classification (ASJC) codes
- Organic Chemistry
- Polymers and Plastics
- Inorganic Chemistry
- Materials Chemistry