The blocked copolymers of polydivinylbenzene block hyperbranched polyethylene were successfully synthesized via in situ copolymerization by Atom Transfer Radical Polymerization (ATRP) method, in which hyperbranched polyethylene capping reactive functional terminal groups were used as macro-comonomers. Hyperbranched polyethylene branches capping functional terminal groups are obtained by injecting divinylbenzene in ethylene "living" polymerization system via end-quenching reaction. The various macro-comonomers have terminal reactive groups on hyperbranched polyethylene branches obtained by varying temperature, pressure, co-monomer type or structure and feed processing duration in chain walking ethylene "living" polymerization processes. It may provide a new way for directly preparing polyolefin-based functionalized block copolymers by various polyolefin-based macro-comonomers. The resulting polydivinylbenzene block hyperbranched polyethylene copolymers have still relatively narrow distribution of molecular weights (around 1.18), predetermined molecular weights, and good compatibilities with polar and nopolar polymers.
Polyurethane - Dispersed Diazo Black GNN Polymer dye (PU-DDB GNN) was synthesized by incorporation of DDB GNN into polyurethane chains. The expected structure of polyurethane-dispersed diazo black GNN polymer dye was confirmed by FT-IR and UV-vis spectra. The photochromic phenomenon of polyurethane-dispersed diazo-black GNN dyes was investigated. And through the thermogravimetric analysis and differential calorimetry analysis, it is confirmed to be an amorphous structure with good thermal stability. Through the test of its mechanical properties, the results show that the elongation at break is quite high.
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