Technical Paper Archive

This site contains all papers presented at Rubber Division, ACS Technical Meetings from 2000-2018. Meetings prior to 2000 are incomplete and papers are added as they are digitized.

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Solvent Selection and Dilution Process to Distinguish Particle Size and Surface Treatment

C21 hwang

Event: 200th Technical Meeting - Fall 2021
Location: Pittsburgh, PA
Date: October 05, 2021
Author: Margaret Hwang
Paper Number: C21

Price: $20.00

  • Fumed silica provides mechanical reinforcement to the silicone matrix in silicone elastomers. Thus, the incorporation of fumed silica and its dispersion quality determines the product properties. This work highlights several considerations when characterizing fillers incorporated into a silicone matrix. When measuring particle size using laser diffraction, the solvent choice and dilution process are critical to ensure the preservation of particle size as-processed. Control of solvent viscosity and mixing intensity is necessary to avoid overshearing the particles, leading to smaller apparent particle size. On the other hand, the surface chemistry of the fillers across samples may also vary depending on the extent of surface treatment during processing. Thus, the solvent selection also determines the solvent-particle interaction, which, if unfavorable, can induce agglomeration and instead lead to bigger apparent particle size.

    Papers from 200th Technical Meeting - Fall 2021

    Items from 200th Technical Meeting - Fall 2021