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Synthesis and Characterization of UV-curable Hyperbranched Polyurethane Acrylate

Shi Hong-ju

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Abstract

The UV-curable hyperbranched polyurethane acrylate(HBUA)with a multi-hydroxyl functional hyperbranched polyester was synthesized via a two-step procedure.The products were characterized by SEC,FT-IR,1H-NMR and TG.The mechanical properties of UV-curing HBUA films were also investigated.It is found that the polydispersity index of HBUA is 2.31 and the endcapped degree of acrylation is 79.8%.The viscosity of HBUA is relatively low in favor of mixing and spreading.The UV-curing films exhibit high hardness and good flexibility.

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The UV-curable hyperbranched polyurethane acrylate(HBUA)with a multi-hydroxyl functional hyperbranched polyester was synthesized via a two-step procedure.The products were characterized by SEC,FT-IR,1H-NMR and TG.The mechanical properties of UV-curing HBUA films were also investigated.It is found that the polydispersity index of HBUA is 2.31 and the endcapped degree of acrylation is 79.8%.The viscosity of HBUA is relatively low in favor of mixing and spreading.The UV-curing films exhibit high hardness and good flexibility.

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Available abstract

The UV-curable hyperbranched polyurethane acrylate(HBUA)with a multi-hydroxyl functional hyperbranched polyester was synthesized via a two-step procedure.The products were characterized by SEC,FT-IR,1H-NMR and TG.The mechanical properties of UV-curing HBUA films were also investigated.It is found that the polydispersity index of HBUA is 2.31 and the endcapped degree of acrylation is 79.8%.The viscosity of HBUA is relatively low in favor of mixing and spreading.The UV-curing films exhibit high hardness and good flexibility.

Key concepts: Materials science, Polyurethane, Acrylate, Dispersity, Curing (chemistry), UV curing, Polymer chemistry, Polyester

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