Paper Title:
Effects of Particle Size and Size Distribution on the Mechanical Properties of EPDM/Silica Vulcanizates
  Abstract

In this work we present the influence of different particle size (surface areas: 120,150, 200 and 250 m2/g) and size distribution of precipitated silica on the mechanical properties of Ethylene- Propylene-Diene (EPDM) rubber. The vulcanization system employed was efficient. Compounds were prepared using a Banbury internal mixer. Tensile and tear properties of vulcanized blends were determined according to ASTM D412 and ASTM D624 procedures, respectively. Results show an increasing tendency on tensile properties when particle size decreases, due to the better dispersion of the filler and to a greater interaction with the rubber. Increases of up to 500% on tensile strength and 400% on tear strength were observed. However, there was an incoherent behavior for the silica with surface area of 200 m2/g (Si-200), so size distribution of the aggregates was experimentally determined by a microphotography study. Secondary aggregates size distribution was very different for each type of silica. Aggregates for Si-200 presented a bimodal distribution where the greater frequencies correspond to aggregates with surface area higher than the corresponding values for the Si-120. This fact could explain why the mechanical properties of the EPDM filled with Si-200 are not in between the values of the compounds filled with Si-150 and Si-250.

  Info
Periodical
Advanced Materials Research (Volumes 47-50)
Edited by
Alan K.T. Lau, J. Lu, Vijay K. Varadan, F.K. Chang, J.P. Tu and P.M. Lam
Pages
113-116
DOI
10.4028/www.scientific.net/AMR.47-50.113
Citation
M.N. Ichazo, C. Albano, M. Hernández, J. González, A. Carta, "Effects of Particle Size and Size Distribution on the Mechanical Properties of EPDM/Silica Vulcanizates", Advanced Materials Research, Vols. 47-50, pp. 113-116, 2008
Online since
June 2008
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Yuan Zheng Sun Tao, Shui Fu Chen, Le Sheng Hu
Abstract:This paper aims to study the influence of aggregate shape and size on the tensile strength, compressive strength and fracture energy in...
971
Authors: Yong Ye, Yi Zhou Cai
Abstract:The objective of this study is to investigate and evaluate the effect of fine aggregates (aggregate size smaller than or equal to 2.36 mm) on...
577
Authors: Tian Li
Chapter 1: Advanced Material Science and Technology
Abstract:In order to find out the influence of geometric characteristics, distribution and combination condition of mineral aggregates on mixture...
191
Authors: Onny Ujianto, Margaret Jollands, Nhol Kao
Chapter 1: Composites and Specialized Composites
Abstract:Polymer/clay nanocomposites have been explored extensively over the last two decades. Many studies report nanocomposite properties. However,...
46