Filler fibrous silicate

Asbestos It is not the name of a distinct mineral species but is a commercial term applied to fibrous varieties of several silicate minerals such as amosite and crocido-lite. These extremely fine fibers are useful as fillers and/or reinforcements in plastics. Property performances include withstanding wear and high temperatures, chemical resistance, and strengths with high modulus of elasticity. When not properly handled or used, like other fibrous materials, they can be hazardous. 

Talc talk [MF talc mica, fr. ML tcdk, fr. Arabic fa/q] (1610) (steatite, talcum) n. Mg3Sl40io(OH)2. A natural hydrous magnesium sihcate, sometimes used as a filler. See magnesium silicate, non-fibrous. 

Ca2Mg5Sis022(OH, F)2. A silicate mineral similar to and sometimes sold as fibrous talc. It can be used in many appUcations in place of asbestos as a filler. 

Poly(vinyl alcohol) has also been shown to provide mechanically adaptive properties to composite films comprised of a PVOH electrospun mat and a PVAc or EO-EPI matrix. Films made from such composites exhibited controlled response to hydration that resulted in a two fold decrease of the storage modulus which, in the case of the PVAc composite, was fully reversible. Expanding on this concept and in a similar motif to the aforementioned CNC composites, Korley and coworkers have recently showcased the potential use of montmorillonite in mechanically adaptive composite materials. Montmorillonite is a layered silicate with high aspect ratio and surface area and is often used in polymer composites to mechanically reinforce the resulting material, while its dispersibility and tunable surface chemistiy make its use particularly attractive. In this case, the incorporation of montmorillonite in the PVOH fibrous filler resulted in enhanced moduli when the polymer matrix consisted of EO-EPI, as opposed to the limited enhancement observed in the case of a PVAc matrix. Nonetheless, both composites showed mechanically switching properties upon hydration, with the weight fraction of montmorillonite affecting the mechanical contrast as well as the response time. ... 

Asbestos - Fillers are made from fibrous mineral silicates, mostly chrysotile. Used in thermosetting resins and laminates in fibrous form as reinforcements... 

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