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.


For older papers not listed here, please send your request, including Meeting Year, Title, Author, and Paper # to: cbrady@rubber.org


View Your Rubber Division Account

Measuring Silica Dispersion Quality in Rubber Mixing

C31 dick measuring silica dispersion quality in rubber mixing

Event: 196th Technical Meeting - Fall 2019
Location: Cleveland, OH
Date: October 08, 2019
Author: John Dick
Paper Number: C31

Price: $20.00

  • Ever greater attention in the rubber industry is being applied to effectively measuring the degree of silica dispersion that has resulted from established factory mixing procedures. This process is particularly complicated because of the rubber phobic nature of silica (compared to carbon black), the required use of an organosilane and required mixing temperatures to be effective, and the need to establish differing degrees of total work history during the mixing process. Three years ago a new standard method for measuring the Payne Effect was developed as ASTM D8059 using the RPA. Also, in 2011 a standard method was developed using a reflected light microscope to measure state of mix under ASTM D7723. In this study, a PremierĀ® RPA Rubber Process Analyzer was used to measure the differences in rheological behavior by using SBR and TESPT with variation in the applied work history during mixing. Processability characteristics as seen in the Payne Effect were measured for these mixed stocks with varying work histories using the RPA with Extended Dynamic Range Technology. Comparisons were also made with the AlphaView DisperGrader, reflected light microscope under special conditions.

    Papers from 196th Technical Meeting - Fall 2019

    Items from 196th Technical Meeting - Fall 2019