What does talcum powder mean for the nucleation of polypropylene

The nucleation effect of talc on polypropylene refers to the fact that talc plays a role in strengthening and modifying polypropylene during the polymerization process.

The methyl group of polypropylene is arranged on the same side of the molecular backbone and is called isometric polypropylene, if the methyl group is arranged in an orderly manner on both sides of the molecular backbone, it is called random polypropylene, and when the methyl group is alternately arranged on both sides of the molecular backbone, it is called interdimensional polypropylene. In the polypropylene resin produced in general industry, the isometric structure content is about 95%, and the rest is random or inter-regular polypropylene. Industrial products are mainly composed of isometric substances.

Polypropylene also includes copolymers of propylene with a small amount of ethylene. It is usually a translucent colorless solid, odorless and non-toxic. Due to the regular structure and high crystallization, the melting point can be as high as 167.

Heat-resistant, corrosion-resistant, products can be sterilized by steam is its outstanding advantages. With its low density, it is the lightest general-purpose plastic. The disadvantage is that the low temperature impact resistance is poor and it is easy to age, but it can be overcome by modification.

The English name of talcum powder is pulvistalci, which is white or off-white, fine, non-sandy powder, and has a greasy feeling to the touch. Odorless, tasteless. This product is insoluble in water, dilute mineral acid or dilute hydroxide alkali solution. It can be used medicinally.

Talcum powder use: used in rubber, plastics, paints, and other chemical industries as a strengthening and modifying filler. Features:

Increase the stability of the product shape, increase the tensile strength, shear strength, flexural strength, compression strength, reduce deformation, elongation, thermal expansion coefficient, high whiteness, uniform particle size and strong dispersion.

It is said that the material, now plastic baby bottles are generally PP, which is said to be a relatively safe material.

One: adding 10% talcum powder will only reduce the toughness of the material, not improve the toughness, so polypropylene should not be added to talc if it wants to fuse quickly.

2: Polypropylene (polypropylene) is a thermoplastic resin prepared by the polymerization of propylene. According to the methyl arrangement, it can be divided into three types: isotaetic polypropylene, atactic polypropylene and syndiotatic polypropylene.

Polypropylene is a non-toxic, odorless, tasteless milky white highly crystalline polymer with a density of only 0 90--"0.At 91g RM, it is one of the lightest varieties of all plastics.

Three: talc (pulvistalci), belonging to the monoclinic crystal system. Colorless, transparent or white, but light green, light yellow, light brown or even light red due to a small amount of impurities; The cleavage surface is pearly luster.

Return to the bladder, lungs, and stomach meridians. Diuretic and drenching, clearing heat and relieving heat, dispelling dampness and sores. It is used for hot shower, stone shower, urinary heat and astringency pain, summer dampness and thirst, damp and hot water diarrhea; External treatment of eczema, eczema, prickly heat.

As far as I know, adding 10% talc will only reduce the toughness of the material, how can it improve the toughness, this is the most basic principle, where did you learn from the upstairs (you can bear high toughness, add 10% talcum powder to bear high toughness about 3 times). We should seek truth from facts when we do technology, and don't publish it casually if we don't understand it, so as not to mislead others. Adding talcum powder to the plastic for modification can improve the heat resistance, hardness and strength of the plastic.

However, the toughness of PP materials will be reduced, and their relationship is inversely proportional. Another point is that the addition of talcum powder also reduces the cost of materials.

Polypropylene is an organic polymer and therefore does not fuse with talc.

Talc, belonging to the monoclinic crystal system. It is a white or off-white, fine, non-sandy powder with a slippery feel to the touch. Slightly airy and odorless. It is insoluble in water, dilute hydrochloric acid or dilute sodium hydroxide solution.

Polypropylene is a thermoplastic resin made from the polymerization of propylene. According to the position of methyl arrangement, it is divided into three types: isometric polypropylene, random polypropylene and inter-conventional polypropylene. Polypropylene is a non-toxic, odorless, tasteless milky white highly crystalline polymer

Adding talcum powder to PP plastic for modification can improve the heat resistance, hardness and strength of the plastic. However, the toughness of PP materials will be reduced, and their relationship is inversely proportional. Another point is that the addition of talcum powder also reduces the cost of materials.

Polypropylene is a thermoplastic resin made from the polymerization of propylene. According to the position of methyl arrangement, it is divided into three types: isometric polypropylene, random polypropylene and inter-conventional polypropylene. Polypropylene is a non-toxic, odorless, tasteless milky white highly crystalline polymer with a density of only 0

90--"0.At 91g RM, it is one of the lightest varieties of all plastics.

1. Nucleation is the formation of crystal nucleus, which is a newly generated tiny particle in a supersaturated solution, and is an indispensable core in the process of crystal growth.

2. Nucleation is subdivided into: primary nucleation and secondary nucleation, of which primary nucleation is divided into primary homogeneous nucleation and primary heterogeneous nucleation, and secondary nucleation is divided into fluid shear stress nucleation and contact nucleation.