Polyolefin/styrene series elastomer blending shape memory material and preparation method thereof
A technology of styrene-based and memory materials, which is applied in the field of shape memory polymer blend materials and its preparation, can solve the problems of high gel rate, material recycling and reprocessing difficulties, etc., achieve good mechanical properties, and be easy to popularize and apply , Excellent effect of memory performance
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Embodiment 1
[0061] First add 60 parts of SEBS, 20 parts of polyethylene wax, 0.2 parts of DCP, and 5 parts of maleic anhydride into an ordinary internal mixer, raise the temperature to a melt temperature of 200°C, and blend for 5 minutes; then blend the obtained SEBS Add 40 parts of HDPE with a melt flow rate of 2 to 4g / 10min, 0.2 parts of DCP, and 3 parts of maleic anhydride to the compound, and continue to blend in an ordinary internal mixer at a melt temperature of 200 ° C for 8 minutes. , that is, get the SMPM. The melt flow rate is 1.5~15g / 10min
[0062] The shape recovery rate of the SMPM is 85-87%, the fixation rate is 85-87%, the tensile strength is 18-20MPa, the recovery time is 2-3s, the recovery response temperature is 33-35°C, and the gel rate is 3-5%.
Embodiment 2
[0064] First add 30 parts of SIS, 9 parts of oxidized polyethylene wax, 0.3 parts of AD, and 4 parts of maleic anhydride into the ordinary internal mixer, heat up to the melt temperature of 180 ° C, blend for 5 minutes and pelletize; then pelletize The blend of SIS and 70 parts of LDPE with a melt flow rate of 5-7g / 10min, 1 part of oxidized polyethylene wax, and 0.3 part of AD, premixed in a high-speed mixer, and then added to the twin-screw extruder , Blended at a melt temperature of 185°C for 2 minutes to obtain SMPM.
[0065] The shape recovery rate of the SMPM is 88-90%, the fixation rate is 85-87%, the tensile strength is 14-16MPa, the recovery time is 3-5s, the recovery response temperature is 63-65°C, and the gel rate is 5-7%.
Embodiment 3
[0067] Add 70 parts of SEBS, 30 parts of PP with a melt flow rate of 9-10g / 10min, 30 parts of polypropylene wax, 0.2 parts of DCP, and 3 parts of silane coupling agent into a high-speed mixer and pre-mix evenly, then add the twin-screw In the extruder, blend for 6 minutes at a melt temperature of 165° C. to obtain SMPM.
[0068] The shape recovery rate of the SMPM is 85-90%, the fixation rate is 88-89%, the tensile strength is 18-20MPa, the recovery time is 2-4s, the recovery response temperature is 33-35°C, and the gel rate is 1-3%.
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