Influence of silica on shape memory effect and mechanical properties of polyurethane–silica hybrids

摘要: Abstract Polyurethane block copolymer (PU) was synthesized and followed by a sol–gel reaction with tetraethoxysilane (TEOS) to prepare high performance polyurethane–silica hybrids shape memory function. Their tensile properties were compared as function of TEOS content PU hard segment content. A test showed that the mechanical largely influenced content, maximum elongation-at-break well breaking stress modulus obtained when at 10 wt% used. Shape also from thermomechanical test, good retention recovery more than 80% for all samples. Consequently, silica hybridization, an improvement in force could be achieved without any decrease their effect.