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In general addition of filler materials will increase the modulus. The additions of calcium carbonate and talc will increase the elastic modulus, while the addition of elastic filler materials can reduce the value slightly. Filler materials increase the modulus due to their rigidity or stiffness and good adhesion with the polymeric matrix. [13]
Talc, or talcum, is a clay mineral composed of hydrated magnesium silicate, with the chemical formula Mg 3 Si 4 O 10 (OH) 2. Talc in powdered form, often combined with corn starch, is used as baby powder. This mineral is used as a thickening agent and lubricant. It is an ingredient in ceramics, paints, and roofing material.
Mineral fillers are used to lower the consumption of more expensive binder material or to improve some properties of the paper. [9] China clay , calcium carbonate, titanium dioxide , and talc are common mineral fillers used in paper production.
A grain filler (pore filler or paste wood filler) is a woodworking product that is used to achieve a smooth-textured wood finish by filling pores in the wood grain. It is used particularly on open grained woods such as oak , mahogany and walnut where building up multiple layers of standard wood finish is ineffective or impractical.
The plaster is not pure plaster of Paris, but rather has additives to improve green strength, dry strength, permeability, and castability.For instance, talc or magnesium oxide are added to prevent cracking and reduce setting time; lime and cement limit expansion during baking; glass fibers increase strength; sand can be used as a filler. [1]
Some talc products may also contain phthalates — chemicals that disrupt hormones in the body and have been linked to ovarian cancer. Plus, talc itself can be abrasive, she added, so it may cause ...
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