English Abstract

Study on the Effect of Filler Distribution and Polymer Phase Structure on Youngfs Modulus in SBR/IR Rubber Blends using Finite Element Method Simulation

Ryota YAMAMOTO *1 *2
Ken ITOMI *1 *2
Sho KUBOUCHI *1 *2
Jun MORITA *1 *2
Takumi ADACHI *1 *2
Junji KAWAI *2
Tetsuo TOMINAGA *2
Lingyun LYU *3
Hiroshi MORITA *4
*1:Research Association of High-Throughput Design and Development for Advanced Functional Materials (ADMAT), Tsukuba, Ibaraki, Japan
*2:JSR Corporation, Yokkaichi, Mie, Japan
*3:Nanomaterials Research Institute, Tsukuba, Ibaraki, Japan
*4:Research Center for Computational Design of Advanced Functional Materials, Tsukuba, Ibaraki, Japan
Nippon Gomu Kyokaishi,(2022),95(4),111-117 Original Paper in Japanese

In this paper, we report the results of a study using finite element method (FEM) simulation on the relationship between the morphology and physical properties of a filler-filled blended rubber. In the blended rubber of styrene-butadiene rubber (SBR) and isoprene rubber (IR), the distributability of the silica fillers of both phases is different. As a result,when the blend ratio is changed, the effective filling amount of the filler in each rubber phase fluctuates, a difference in the reinforcing effect occurs, and the mechanical property value of the blended rubber changes discontinuously.
Furthermore, the phase separation structure of rubber changes in a complicated manner depending on the blend ratio. We expressed the input physical property value as a function of the distribution ratio of the filler, and devised a simulation model using a typical phase-separated structure model of the polymer blend. Using this model, we report the results of considering the relationship between filler dispersibility, phase structure, and Youngfs modulus in blended rubber.

Keywords: Rubber Blends, Silica Filled Rubber, Filler Distribution, Finite Element Method Simulation, Youngfs Modulus, Scanning Transmission Electron Microscopy Tomography, EDX Mapping