Publication date: 8th January 2019
Polymers are an attractive alternative to inorganic thermoelectric materials as they are lightweight, generally of low cost to manufacture, offer freedom-of-design as well as having low thermal conductivity. However, our fundamental understanding of thermal transport in polymeric systems needs to be drastically improved to gain the capability to design systems for thermal applications from the outset. The abundance of variety of polymers systems renders this task highly challenging. For instance, while blending is a well-known route for the manipulation of polymer properties, little is known how various blending options affect the thermal conductivity of the blend components and the overall blend. Here, we use polymers with model functional groups and discuss the effect of blending on chain conformation and how, in turn, this changes the thermal transport of the overall material. We draw comparisons to other multicomponent systems such as organic/inorganic hybrid materials and present data that start allowing us to establish design rules and how structural features―both in blends and inorganic/organic hybrids―affect thermal conductivity. Ultimate goal is to provide a general understanding on a broad range of systems that can be used to tune the thermal conductivity of polymers to the final required properties.
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