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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New Ultra-High Mooney Branched EPDM: Easy to Process High Filler Loading Compounds

B02 wu paper

Event: 198th Technical Meeting - Fall 2020
Location: Virtual
Date: October 19, 2020
Author: Xiaosong Wu
Paper Number: B02

Price: $20.00

  • Designing EPDM compounds with balanced properties and processability for various applications is of key interest and poses many fundamental challenges to rubber chemists. An ultrahigh Mooney Viscosity EPDM combined with long chain branching (LCB) allows favorable engineering properties such as improved shear thinning, higher collapse resistance and increased melt elasticity in response to extensional flow. Dow’s new advances in catalyst and polymerization process technology expands the molecular structure design capability to produce EPDMs with higher molecular weight and higher LCB structure. This paper introduces a new EPDM ultra-high Mooney viscosity EPDM with tailored LCB levels to not only improve the processability of the EPDM, but also to improve the EPDM compound physical properties to meet the industry need for higher filler and oil loading. The polymer structure, compound formulation, compound rheology, vulcanization characteristics, and cured compound mechanical property improvements of the new developmental EPDM grade are discussed.

    Papers from 198th Technical Meeting - Fall 2020

    Items from 198th Technical Meeting - Fall 2020