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Wollastonites

Encyclopedia of Polymers and Composites

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Definitions

Wollastonite is a naturally occurring calcium silicate mineral with an acicular (needlelike) particle shape when carefully processed. The acicular shape allows it to give useful properties in many polymers, especially polypropylene, polyamides, and thermosets such as epoxies and phenolics.

Introduction

Wollastonite is named after William Hyde Wollaston (1766–1828), an English chemist and physicist who discovered the chemical elements rhodium and palladium. The mineral was named after Wollaston because he rendered outstanding services to crystallography and mineralogy.

Wollastonite is a metasilicate having an inosilicate (chain silicate) structure. It belongs to the pyroxenoid group of minerals. It is the only white acicular mineral and became famous and widely used in the industry in the 1970s–1980s as a nonhazardous replacement for asbestos fibers. The applications are widely spread reaching from additive in metallurgy (protective slag, welding electrodes) over ceramics,...

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Abbreviations

PA:

Polyamide

PP:

Polypropylene

PUR R-RIM:

Polyurethane for reinforced reaction injection molding

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Authors and Affiliations

  1. Head of R&D, Quarzwerke GmbH, Kaskadenweg 70-82, 50226, Frechen, Germany

    Joerg Ulrich Zilles

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  1. Joerg Ulrich Zilles
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Correspondence to Joerg Ulrich Zilles .

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Editors and Affiliations

  1. Indian Institute of Technology-Roorkee, Saharanpur, India

    Sanjay Palsule

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Zilles, J.U. (2013). Wollastonites. In: Palsule, S. (eds) Encyclopedia of Polymers and Composites. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-37179-0_4-5

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  • DOI: https://doi.org/10.1007/978-3-642-37179-0_4-5

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  • Online ISBN: 978-3-642-37179-0

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Chapter history

  1. Latest

    Wollastonites
    Published:
    22 April 2016

    DOI: https://doi.org/10.1007/978-3-642-37179-0_4-6

  2. Original

    Wollastonites
    Published:
    19 March 2014

    DOI: https://doi.org/10.1007/978-3-642-37179-0_4-5

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