Haojie Yu
Zhejiang University, China
Title: Preparation of hyperbranched polyethylene-based copolymers and their applicaitons
Biography
Biography: Haojie Yu
Abstract
Hyperbranched polyethylene exhibits unique branched topology and properties. However, hyperbranched polyethylene lacks polar functionality, which limited its further application. Introduction of polar functionality into hyperbranched polyethylene via graft polymerization method can extend its application scope. Herein, a series of hyperbranched polyethylene-based polymethacrylates polymers were synthesized through a combination of coordination polymerization and atom transfer radical polymerization. The dispersibility of MWCNTs employing the obtained hyperbranched polyethylene-based polymethacrylates was evaluated via TGA, UV-vis, TEM and SEM technologys. These results indicated that MWCNTs were effectively dispersed by the hyperbranched copolymers. Then, hyperbranched polyethylene-based polymethacrylates/MWCNTs/PET composite film was fabricated and its conductivity was measured. The resultant film exhibited uniform MWCNTs networks and excellent conductivity. Moreover, the composite film showed good conductivity even it was bentand released for 1000 times. The mechanism of the dispersion of MWCNTs by hyperbranched polyethylene-based polymethacrylates was discussed. Existence of π-π stacking interactions between the hyperbranched polyethylene-based polymethacrylates and MWCNTs was proved by UV-vis results. The obtained conductive composite films might find its potential application in electronic devices.