Calcium carbonate particle distribution characterization method of a calcium carbonate reinforced polymer

Abstract

The invention provides a calcium carbonate-reinforced polymer calcium carbonate particle distribution characterization method. The method comprises the following steps of preparing a calcium carbonate-containing polymer transparent film sample with calcium carbonate content of 2-15wt%, wherein compared with the calcium carbonate-reinforced polymer formula, the sample formula has the basically same components and content but calcium carbonate content or has completely same components and content, taking a sample from the calcium carbonate-containing polymer film sample, acquiring a sample appearance picture by an optical microscope, carrying out image processing, extracting calcium carbonate particle distribution information of the sample, and carrying out statistication to obtain the approximate distribution case of the calcium carbonate particles. The method solves the problem that the existing calcium carbonate particle distribution characterization method cannot accurately determine a microscopic particle distribution structure of the conventional calcium carbonate-reinforced composite material, and has an important meaning for calcium carbonate-reinforced composite material research.

Description

technical field [0001] The invention belongs to the fields of plastic industry and composite materials, and in particular relates to a method for characterizing the distribution of calcium carbonate particles of calcium carbonate reinforced polymers. Background technique [0002] Calcium carbonate is a general filler with low price, rich sources, non-toxic, non-irritating, good color, etc. It has been widely used in various industries such as rubber, plastics, automobiles, home appliances, papermaking, and printing. General-purpose plastic polymers such as polypropylene have limited their applications due to disadvantages such as low modulus, poor impact resistance, and high brittleness at low temperatures or high strain rates. Later, it was found that adding calcium carbonate particles to plastics can improve the rigidity, impact resistance, dimensional stability and heat resistance of polymers. In recent years, with the improvement of surface modification technology and t...

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Problems solved by technology

[0003] Due to the strong hydrophilicity and high surface energy of calcium carbonate, calcium carbonate particles tend to aggregate into groups, and these agglomerated calcium carbonate particles tend to form stress concentration points. When the composite material is stressed, cracks are easy to agglomerate along The rapid expansion of the particles greatly reduces the mechanical properties of the composite

However, these agglomerated particles are difficult to detect when using microscopic electron microscopy (such as SEM, TEM) detection because the detection area is too small

[0004] At present, since the real distribution state of calcium carbonate particles in the polymer cannot be accurately characterized by microscopic electron microscopy, there is a lack of feasible exploration rules in industrial production, so the formula can only be determined by trial and error, which is inefficient and extremely costly. Time

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