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The e ects of functionality and molecular weight of polyurethane acrylate (PUA) oligomer and lm composition (LC/resin) on the morphology and di raction eciency of transmission-type holographic polymer dispersed liquid crystal (HPDLC) have been studied. Low-molecular-weight and high-functionality oligomer gave better LC-resin phase separation, due to high immiscibility and crosslink density. A maximum di raction eciency of over 85 % was obtained with trifunctional polyol, low-molecular -weight (PG500), with a lm composition of 35/65 (LC/resin).


The e ects of functionality and molecular weight of polyurethane acrylate (PUA) oligomer and lm composition (LC/resin) on the morphology and di raction eciency of transmission-type holographic polymer dispersed liquid crystal (HPDLC) have been studied. Low-molecular-weight and high-functionality oligomer gave better LC-resin phase separation, due to high immiscibility and crosslink density. A maximum di raction eciency of over 85 % was obtained with trifunctional polyol, low-molecular -weight (PG500), with a lm composition of 35/65 (LC/resin).