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


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Influence of SSBR Microstructure on Silica Mixing & Compound Performance

Colvin  h.   douglas  judy

Event: 185th Technical Meeting
Location: Louisville, KY
Date: March 24, 2014
Author: Judy E. Douglas and Howard Colvin
Paper Number:

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  • Presentation Slides.
    Tire tread compounds can be adjusted to meet performance requirements by adjusting the weight average glass transition temperature (Tg) of the compound. This can be done by changing the ratio of SBR to BR or by changing the Tg of the SBR or a combination of the two.
    Compounders have varying opinions on the optimum SSBR microstructure for “best” performance at any given Tg, but there is little data where the performance of equivalent polymers, from a molecular weight and molecular weight distribution point of view, have been compared. This paper looks at the synthesis and performance of three pairs of solution SBRs, all with the same molecular weight and molecular weight distribution, at three different glass transition temperatures i.e. -16°C, -24 °C & -46 °C. Each pair consists of a high vinyl/low styrene and a high styrene/low vinyl SSBR. These polymers were mixed in a classic silica tread formulation, and tested using various laboratory predictors of tread performance and compound processability. The effect of styrene and vinyl content on performance and processability were determined across this range of polymer glass transition temperatures.

    Papers from 185th Technical Meeting

    Items from 185th Technical Meeting