作者：Mitra S. Ganewatta,? Wenyue Ding,? Md Anisur Rahman,? Liang Yuan,? Zhongkai Wang,? Nasrollah Hamidi,
关键字：Rosin, plant oil, TPEs
论文来源：期刊
具体来源：Macromolecules
发表时间：2016年

Utilization of biomass for commodity polymers has gained tremendous interest. We report a method to prepare high molecular weight renewable homopolymers and block copolymers derived from natural rosin. Monomers with high renewable content (70 wt %) were prepared via a simple esterification reaction between dehydroabietic alcohol and 5-exo-norbornenecarboxylic acid. Living and controlled polymerization of these monomers were achieved by ring-opening metathesis polymerization to obtain polymers with molecular weight up to ～500 kg/mol. These homopolymers exhibit structure-dependent glass transition temperatures, excellent thermal stabilities, and thermoplastic properties. Chain entanglement molecular weight was determined via rheological assessments for such polymers with bulky side moieties. Using the living ROMP, dehydroabietic-based homopolymer was chainextended with a soybean oil-derived norbornene monomer to yield triblock copolymers, which showed behaviors ofthermoplastic elastomers.