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In recent years, various polypropylene materials (PP) have been widely used in the automotive industry, construction industry and other fields due to their low density and corrosion resistance
Wollastonite is a chain metasilicate mineral with a needle-like structure with high aspect ratio and strong anisotropy.
There are hydrophilic groups on the surface of natural wollastonite, which has obvious hydrophilicity and oleophobicity.
Ran Xia et al.
(1) The composite modification of wollastonite by stearic acid and silane coupling agent KH-570, the optimal process conditions are: the total mass fraction of composite modifier is 2%, the mass ratio of stearic acid to KH-570 It is 1:1, the modification time is 1h, the temperature is 60°C, and the stirring speed is 300r/min
(2) When the filling amount is 45%, the flexural modulus of the modified wollastonite-filled polypropylene composite material is 1531.
(3) Compared with the unmodified wollastonite, the modified wollastonite and polypropylene have a better bonding interface, indicating that the modification is beneficial to improve the mechanical properties of the modified wollastonite/polypropylene composite