The present invention discloses a microwave-modified calcite powder specifically for polypropylene, comprising the following raw material components by weight: calcite powder 120–180 parts, graphene liquid 40–60 parts, hexadecyl sulfate 3–5 parts, coupling agent 1–3 parts; wherein the coupling agent is either a silane coupling agent or a titanate.
The preparation method for the modified calcite powder involves weighing the raw materials proportionally.
Calcite powder, graphene liquid, hexadecyl sulfate, and coupling agent are then mixed under high-speed stirring at 90–120°C with microwave irradiation for 15–25 minutes.
Following this, low-speed stirring is applied for 3–5 minutes before cooling and discharging the mixture.
The modified calcite powder and polypropylene are dried, mixed in proportion, and uniformly blended before being fed into a twin-screw extruder for pelletization.
The pellets are then injection molded to produce the composite material.
This invention addresses the technical challenge of poor compatibility between calcite surfaces and polymers.
Mixing modified calcite powder with polypropylene significantly enhances the mechanical properties of the composite material.
Country Code: CN
Application Number: CN202211356196.9
